Updated on 2023/03/27

写真a

 
FUNAZUKURI Toshitaka
 
Organization
Faculty of Science and Engineering Professor
Other responsible organization
Applied Chemistry Course of Graduate School of Science and Engineering, Master's Program
Applied Chemistry Course of Graduate School of Science and Engineering, Doctoral Program
Contact information
The inquiry by e-mail is 《here
External link

Degree

  • Doctor of Philosophy ( University of Waterloo, Graduate School )

Research History

  • 2000.4 -  

    中央大学理工学部教授

  • 2000.4 -  

    ~ 中央大学理工学部教授

  • 1997.4 - 2000.3

    中央大学理工学部助教授   Faculty of Science and Engineering

  • 1983.4 - 1997.3

    横浜国立大学工学部助手

Professional Memberships

  • 化学工学会

  • 日本木材学会

  • 廃棄物資源循環学会

  • 日本高圧力学会

  • 分離技術会

  • 環境科学会

  • アメリカ化学工学会

  • プラスチック化学リサイクル研究会

  • アメリカ化学会

  • American Institute of Chemical Engineers

  • American Chemical Soceity

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Research Interests

  • Supercritical

  • chemical recycling

  • polymer

  • 拡散

  • 超臨界流体

  • ケミカルリサイクル

  • ポリマー

  • "Diffusion, Supercritical"

  • "chemical recycling, polymer"

  • Diffusion

Research Areas

  • Environmental Science/Agriculture Science / Environmental materials and recycle technology

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Transport phenomena and unit operations  / 化工物性・移動操作・単位操作

Papers

  • Measurements and correlation of infinite dilution binary diffusion coefficients for Cr(acac)3 in high temperature supercritical carbon dioxide Reviewed

    M. Yamamoto, N. Onodera, J. Sakabe, C. Y. Kong, T. Funazukuri

    Fluid Phase Equilibria   560   113502 - 113502   2022.9

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  • Measurements of binary diffusion coefficient for platinum(II) acetylacetonate in high temperature supercritical carbon dioxide by the chromatographic impulse response method Reviewed

    E. Iwata, N. Onodera, J. Sakabe, C. Y. Kong, T. Funazukuri

    Journal of Supercritical Fluids   190   105736   2022.9

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    Infinite dilution binary diffusion coefficients D12 and retention factors k for platinum(II) acetylacetonate in high temperature supercritical carbon dioxide (scCO2 were measured by the chromatographic impulse response method. All the present D12 data and those previously measured below 343 K over the entire region from gas-like to liquid-like scCO2 were well represented by the Schmidt number correlation over the temperature range from 308.2 K to 454.2 K with an average relative deviation (ARD) of 6.5 % for 109 measurement conditions.

    DOI: 10.1016/j.supflu.2022.105736

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  • Determination of diffusivities of triolein in pressurized liquids and in supercritical CO2 Invited Reviewed

    G. Cai, W. Katsumata, I. Okajima, T. Sako, T. Funazukuri, C. Y. Kong

    Journal of Molecular Liquids   354   118860 - 118860   2022.5

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    DOI: 10.1016/j.molliq.2022.118860

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  • Measurements of infinite dilution binary diffusion coefficients of acetylferrocene and 1,1’-diacetylferrocene in supercritical carbon dioxide and in liquid organic solvents Reviewed

    Y. Okubo, C. Y. Kong, J. Sakabe, T. Funazukuri

    Journal of Supercritical Fluids   177   105321 - 105321   2021.7

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    DOI: 10.1016/j.supflu.2021.105345

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  • Argon Gas Solubility in Styrene and Nitrogen, Oxygen and Argon Gas Solubilities in Methyl Methacrylate at (293 to 313) K and at Pressures up to 3.8 MPa Reviewed

    A. J, X. Lai, T. Tsuji, L. S. Tan, R. Bharath, T. Hoshina, T. Funazukuri

    50 ( 7 )   1008 - 1026   2021.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer  

    DOI: 10.1007/s10953-021-01101-7

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  • Evaluation of Henry constant for gas / gas mixture in pure and solvent mixture using simple functional mixing rule Reviewed

    A. J, X. Lai, A. N. Basha, L. S. Tan, T. Tsuji, T. Hoshina, T. Funazukuri, R. Bharath

    Materials Science and Engineering   1051   012086 - 012086   2021.3

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    DOI: 10.1088/1757-899x/1051/1/012086

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  • Debromination of tetrabromobisphenol A in aqueous amine solutions under hydrothermal conditions Reviewed

    J. Sakabe, Y. Kimura, J. Endo, T. Funazukuri

    Journal of Water Process Engineering   38   101553 - 101553   2020.12

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    DOI: 10.1016/j.wpe.2020.101553

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  • Measurements and correlation of diffusion coefficients of ibuprofen in both liquid and supercritical fluids Reviewed

    C. Y. Kong, K. Sugiura, S. Natsume, J. Sakabe, T. Funazukuri, K. Miyake, I. Okajima, S. Badhulika, T. Sako

    The Journal of Supercritical Fluids   159   104776   2020.5

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    The diffusion coefficients of ibuprofen in both liquid and supercritical fluids are presented for the first time. The diffusion values in liquid ethanol were measured by the Taylor dispersion method at temperatures from 298.15 K to 333.15 K and pressures from 0.10 MPa to 30.00 MPa. Those in supercritical CO were carried out by the chromatographic impulse response method at 308.15 K–353.15 K and up to 40.00 MPa. The determined diffusion activation energies in supercritical CO were E =18.6 kJ/mol to 11.0 kJ/mol at P = 15.00 MPa to 35.00 MPa, and those in liquid ethanol were E =16.3 kJ/mol to 15.1 kJ/mol at P = 0.10 MPa to 30.00 MPa, respectively. All the diffusion data of ibuprofen in liquid ethanol and in supercritical CO were well correlated by the hydrodynamic equation proposed in this study, with an average absolute relative deviation of 2.2 % for 115 data points. 2 2 a a 2

    DOI: 10.1016/j.supflu.2020.104776

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  • The retention factors and partial molar volumes of ibuprofen at infinite dilution in supercritical carbon dioxide at T= (308.15, 313.15, 323.15, 333.15, 343.15 and 353.15) K Reviewed

    C. Y. Kong, K. Sugiura, T. Funazukuri, K. Miyake, I. Okajima, S. Badhulika, T. Sako, Takeshi

    Journal of Molecular Liquids   296   111849   2019.12

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  • Development of small-scale experiments for the education of chemical engineering and its practice for undergraduates Reviewed

    K. Katayama, R. Ichinose, Y. Konno, W. Y. Sohn, S. Kuwahara, T. Funazukuri

    ChemRxiv   1 - 27   2019.10

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  • Estimation of kinematic viscosities at high pressures for binary mixtures CO2 + solvent using modified Eyring-Wilson and McAllister models Reviewed

    H. Matsuda, K. Tochigi, K. Kurihara, T. Funazukuri, V. K. Rattan

    Molecular Physics   117 ( 23-24 )   3913 - 3921   2019.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Taylor & Francis  

    DOI: 10.1080/00268976.2019.1671618

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  • Estimation of kinematic viscosities for multi-component systems using modified Eyring and activity coefficient model Reviewed

    H. Matsuda, K. Tochigi, K. Kurihara, T. Funazukuri, V. K. Rattan

    Fluid Phase Equilibria   492   137 - 144   2019.7

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    DOI: 10.1016/j.fluid.2019.03.017

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  • Effect of mobile phase composition on retention factor in supercritical fluid chromatography Reviewed

    Tomohito Sugihara, Shohei Wakamiya, Yuna Ono, Chang Yi Kong, Junichi Sakabe, Toshitaka Funazukuri

    Journal of the Institute of Science and Engineering , Chuo University   ( 24 )   37 - 46   2019.3

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  • Estimation of kinematic viscosities at high pressures for binary mixtures CO2 + solvent using modified Eyring-Wilson and McAllister models Invited Reviewed

    H. Matsuda, K. Tochigi, K. Kurihara, T. Funazukuri, V. K. Rattan

    Molecular Physics   117 ( 23-24 )   3913 - 3921   2019

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  • Effects of pretreatment with ionic liquids on cellulose hydrolysis under hydrothermal conditions Reviewed

    T. Funazukuri, S. Ozawa

    Molecules   24 ( 19 )   3572 - 3572   2019

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:MDPI publishers  

    DOI: 10.3390/molecules24193572

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  • The retention factors and partial molar volumes of ibuprofen at infinite dilution in supercritical carbon dioxide at T= (308.15, 313.15, 323.15, 333.15, 343.15 and 353.15) K Reviewed

    C. Y. Kong, K. Sugiura, T. Funazukuri, K. Miyake, I. Okajima, S. Badhulika, T. Sako

    Journal of Molecular Liquids   296   111849   2019

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    Here is presented the first experimental data for the infinite dilution partial molar volumes of ibuprofen in supercritical carbon dioxide. The measurements were carried out by supercritical fluid chromatography using chemically bonded polyethylene glycol and carbon dioxide as stationary and mobile phases, respectively. The chromatographic retentions of ibuprofen at infinite dilution in supercritical carbon dioxide were measured at six supercritical isotherms of 308.15, 313.15, 323.15, 333.15, 343.15 and 353.15 K and at a pressure range of 8.50–40.00 MPa. The partial molar volumes were determined from the partial derivatives of the retention factors with respect to the densities and were in the range of −2.364 × 10 to 1.680 × 10 m /mol. A reverse behaviour was observed, where the partial molar volumes decreased monotonically with decreasing pressure from positive to negative values in all temperature regions investigated. It was also found that the infinite dilution partial molar volumes showed a sharp decrease near the critical point of carbon dioxide. The experimental partial molar volumes were correlated with isothermal compressibilities and densities of carbon dioxide. The correlation proposed in this study could predict the experimental data with an average absolute relative deviation of 4.6% for 80 data points, which is better than that previously reported in the literature. −3 −4 3

    DOI: 10.1016/j.molliq.2019.111849

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  • Estimation of kinematic viscosities for multi-component systems using modified Eyring and activity coefficient model Reviewed

    H. Matsuda, K. Tochigi, K. Kurihara, T. Funazukuri, V. K. Rattan

    Fluid Phase Equilibria   492   137 - 144   2019

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  • Development of small-scale experiments for the education of chemical engineering and its practice for undergraduates Reviewed

    K. Katayama, R. Ichinose, Y. Konno, W. Y. Sohn, S. Kuwahara, T. Funazukuri

    ChemRxiv   2019   1 - 27   2019

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society  

    DOI: 10.1080/00268976.2019.1671618

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  • Effects of pretreatment with ionic liquids on cellulose hydrolysis under hydrothermal conditions Reviewed

    T. Funazukuri, S. Ozawa

    Molecules   24 ( 19 )   3572   2019

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Books

  • 超臨界流体を用いる合成と加工

    化学工学会, 超臨界流体部会( Role: Joint author)

    シーエムシー出版  2017.10 

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    Total pages:252   Responsible for pages:6-14   Language:Japanese   Book type:Scholarly book

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  • 物性推算とその応用(最近の化学工学65)

    ( Role: Joint author)

    化学工学会  2016.1 

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    Total pages:10   Responsible for pages:200   Language:Japanese   Book type:Scholarly book

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  • 化学工学物性測定マニュアル

    岩井芳夫, 滝嶌繁樹, 辻智也, 栃木勝己編著( Role: Joint author)

    分離技術会  2015.10 

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    Total pages:196   Responsible for pages:6   Language:Japanese   Book type:Scholarly book

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  • Recycling Materials Based on Environmentally Friendly Techniques

    InTech  2015.7 

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  • Recycling Materials Based on Environmentally Friendly Techniques

    ( Role: Joint author)

    InTech  2015.7 

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    Total pages:124   Responsible for pages:16   Language:English   Book type:Scholarly book

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  • ナノスケール・ミクロスケールから見えるビックな世界

    新藤斎( Role: Joint author)

    中央大学出版部  2013.10 

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    Total pages:359   Responsible for pages:141-157   Language:Japanese   Book type:Scholarly book

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  • 化学技術者のための実用熱力学演習

    栃木勝己, 宮野善盛, 船造俊孝, 鈴木潔光, 辻智也, 児玉大輔, 松田弘幸( Role: Joint author)

    化学工業社  2013.9 

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    Total pages:170   Language:Japanese   Book type:Scholarly book

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  • Hydrothermal Conversion of Cellulose to Glucose and Oligomers in Dilute Aqueous Formic Acid Solution

    InTech  2013.8 

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  • Cellulose - Biomass Conversion

    ( Role: Joint author)

    InTech  2013.8 

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    Total pages:226   Responsible for pages:20   Language:English   Book type:Scholarly book

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  • Hydrothermal Conversion of Cellulose to Glucose and Oligomers in Dilute Aqueous Formic Acid Solution

    Funazukuri, Toshitaka( Role: Sole author)

    InTech  2013.8 

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    Total pages:226   Language:English   Book type:Scholarly book

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  • Cellulose - Biomass Conversion

    InTech  2013.8 

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  • Hydrothermal Depolymerization of Carbohydrates

    Nova Science Publishers, Inc.  2010.10 

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  • Hydrothermal Depolymerization of Carbohydrates

    Ashutosh Tiwari( Role: Joint author)

    Nova Science Publishers, Inc.  2010.10 

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    Responsible for pages:423-448   Language:English   Book type:Scholarly book

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  • 超臨界流体入門

    ( Role: Sole author)

    丸善株式会社  2008.12 

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    Total pages:237   Responsible for pages:12   Language:Japanese   Book type:Scholarly book

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  • 超臨界流体中における拡散係数と物質移動に関する装置定数

    船造俊孝( Role: Sole author)

    化学工業社  2007.12 

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    Total pages:175   Responsible for pages:145-151   Language:Japanese   Book type:Scholarly book

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  • Production of mono- and oligo-saccharides from hydrothermal degradation of polygalacturonic acid

    World Scientific  2003.12 

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  • Production of mono- and oligo-saccharides from hydrothermal degradation of polygalacturonic acid

    T. Miyazawa, T. Funazukuri( Role: Sole author)

    World Scientific  2003.12 

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    Total pages:537   Responsible for pages:75-81   Language:English   Book type:Scholarly book

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  • 超臨界流体中における低揮発性有機化合物の無限希釈相互拡散係数の測定,

    船造俊孝, 共著( Role: Sole author)

    日本分光  2001.10 

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    Responsible for pages:38-43   Language:Japanese   Book type:Scholarly book

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  • Ress法

    柳田博明監修, 名分担執筆( Role: Sole author)

    フジテクノシステム  2001.10 

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    Responsible for pages:676-680   Language:Japanese   Book type:Scholarly book

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  • 用語解説 超臨界流体技術

    船造俊孝( Role: Sole author)

    日本芳香族工業会  1999.7 

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    Responsible for pages:286-291   Language:Japanese   Book type:Scholarly book

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  • 超臨界流体の科学と技術(355p.)のうち3章6節

    斎藤正三郎監修( Role: Sole author)

    三共ビジネス  1996.2 

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    Responsible for pages:139-158   Language:Japanese   Book type:Scholarly book

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MISC

  • Estimation of kinematic viscosities for CO2 expanded liquids by ASOG-VISCO model

    Hiroyuki Matsuda, Kiyofumi Kurihara, Katsumi Tochigi, Toshitaka Funazukuri, V. K. Rattan

    Fluid Phase Equilibria   470   188 - 192   2018.8

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    This study aims for an estimation of kinematic viscosities for CO2 expanded liquids by the ASOG-VISCO model. The ASOG-VISCO group pair parameters were determined from literature kinematic viscosities of binary mixtures CO2 + paraffin, alcohols, or ketone for group pairs of CO2, CH2, OH, and CO at the temperature range of 298–373 K. The ASOG-VISCO model showed good estimation accuracies in the kinematic viscosities for four mixtures CO2 + organic solvent, giving 5.97% of the average absolute relative deviation. The McAllister model was also used for the estimation of the kinematic viscosities studied, and the estimated results were compared with those by the ASOG-VISCO model.

    DOI: 10.1016/j.fluid.2018.01.033

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  • Estimation of kinematic viscosities for CO2 expanded liquids by ASOG-VISCO model

    Hiroyuki Matsuda, Kiyofumi Kurihara, Katsumi Tochigi, Toshitaka Funazukuri, V. K. Rattan

    Fluid Phase Equilibria   470   188 - 192   2018.8

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    Language:English   Publisher:Elsevier B.V.  

    This study aims for an estimation of kinematic viscosities for CO2 expanded liquids by the ASOG-VISCO model. The ASOG-VISCO group pair parameters were determined from literature kinematic viscosities of binary mixtures CO2 + paraffin, alcohols, or ketone for group pairs of CO2, CH2, OH, and CO at the temperature range of 298–373 K. The ASOG-VISCO model showed good estimation accuracies in the kinematic viscosities for four mixtures CO2 + organic solvent, giving 5.97% of the average absolute relative deviation. The McAllister model was also used for the estimation of the kinematic viscosities studied, and the estimated results were compared with those by the ASOG-VISCO model.

    DOI: 10.1016/j.fluid.2018.01.033

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  • Concerning the determination and predictive correlation of diffusion coefficients in supercritical fluids and their mixtures

    Toshitaka Funazukuri

    Journal of Supercritical Fluids   134   28 - 32   2018.4

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    Although a large quantity of diffusion coefficient data exist for sub- and supercritical (sc) fluids, these values are not applicable to the conditions associated with new applications such as material processing. The hydrodynamic equation D/T=αηβ, where D is the infinite dilution binary or self-diffusion coefficient, T is the temperature and η is the solvent viscosity, is useful for predicting diffusion coefficients in liquid and liquid-like sc states. This equation is also valid in dense solvent mixtures, but generates less accurate predictions in solvent mixtures. This deviation between experimental value for the mixture solvent and the background value based on a single component solvent was found to be correlated with the excess solvent viscosity value. New experimental diffusion coefficient data and a predictive correlation including the gas-like sc region (that is, at high temperatures and/or low densities) will be required to make accurate predictions when applying sc technology to material processing.

    DOI: 10.1016/j.supflu.2017.11.035

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  • Concerning the determination and predictive correlation of diffusion coefficients in supercritical fluids and their mixtures

    T. Funazukuri

    Journal of Supercritical Fluids   28 - 32   2018.4

  • Density dependence of retention factors of trans-stilbene oxide for chiral separation by supercritical, fluid chromatography

    Toshitaka Funazukuri, Yuna Ono, Junichi Sakabe, Chang Yi Kong

    JOURNAL OF CHROMATOGRAPHY A   1527   91 - 96   2017.12

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    Language:English   Publisher:ELSEVIER SCIENCE BV  

    Retention factors for two enantiomers of trans-stilbene oxide, k(1) and k(2), were measured with a chiral AD-H column using two syringe pumps to feed CO2 and methanol as a co-solvent at various temperatures, pressures and co-solvent mole fractions to determine the effects of these operating conditions on the retention factors. The retention factors k(1) and k(2) are for the (R,R)- and (S,S)-forms, respectively. When the isothermal compressibilities of a mixture of CO2 and MeOH were lower than 0.01, far from the critical locus of the CO2 and methanol mixture, both retention factors were well expressed with the solvent density and temperature with an average absolute relative deviation of 1-2%. In the vicinity of the critical locus, however, where the isothermal compressibilities were much larger than 0.01, the relationship between retention factor and density was complicated. Both retention factors were proportional to the isothermal compressibility, irrespective of methanol mole fraction at each temperature. (c) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.chroma.2017.10.029

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  • Density dependence of retention factors of trans-stilbene oxide for chiral separation by supercritical, fluid chromatography

    Toshitaka Funazukuri, Yuna Ono, Junichi Sakabe, Chang Yi Kong

    JOURNAL OF CHROMATOGRAPHY A   1527   91 - 96   2017.12

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    Language:English   Publisher:ELSEVIER SCIENCE BV  

    Retention factors for two enantiomers of trans-stilbene oxide, k(1) and k(2), were measured with a chiral AD-H column using two syringe pumps to feed CO2 and methanol as a co-solvent at various temperatures, pressures and co-solvent mole fractions to determine the effects of these operating conditions on the retention factors. The retention factors k(1) and k(2) are for the (R,R)- and (S,S)-forms, respectively. When the isothermal compressibilities of a mixture of CO2 and MeOH were lower than 0.01, far from the critical locus of the CO2 and methanol mixture, both retention factors were well expressed with the solvent density and temperature with an average absolute relative deviation of 1-2%. In the vicinity of the critical locus, however, where the isothermal compressibilities were much larger than 0.01, the relationship between retention factor and density was complicated. Both retention factors were proportional to the isothermal compressibility, irrespective of methanol mole fraction at each temperature. (c) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.chroma.2017.10.029

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  • CO2 solubility in water containing monosaccharides, and the prediction of pH using Peng-Robinson equation of state

    Tomoya Tsuji, Marina Shigeru, Taka-aki Hoshina, Kenichi Yoneda, Toshitaka Funazukuri, Noor Azian Morad

    FLUID PHASE EQUILIBRIA   441   9 - 16   2017.6

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    Language:English   Publisher:ELSEVIER SCIENCE BV  

    Carbon dioxide (CO2) solubility was measured in aqueous solutions containing 0.6 wt% D(+)-galacturonic acid (GalH) or sodium D(+)-galacturonate (GalNa) by use of a recirculating apparatus at 313.4 K and at pressures up to 9.29 MPa. The solubilities of CO2 in the two solutions containing Gales or GalNa were similar to those in pure water. The experimental data were correlated with the Peng-Robinson-Stryjek-Vera (PRSV) equation of state. A new method was developed to estimate pH by use of the molar volume from the PRSV equation and compared with measured pH values. It gives some idea of the quantitative agreement between the equation of states and the measured pH values over the same range of conditions. (C) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.fluid.2017.03.005

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  • CO2 solubility in water containing monosaccharides, and the prediction of pH using Peng-Robinson equation of state

    Tomoya Tsuji, Marina Shigeru, Taka-aki Hoshina, Kenichi Yoneda, Toshitaka Funazukuri, Noor Azian Morad

    FLUID PHASE EQUILIBRIA   441   9 - 16   2017.6

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    Language:English   Publisher:ELSEVIER SCIENCE BV  

    Carbon dioxide (CO2) solubility was measured in aqueous solutions containing 0.6 wt% D(+)-galacturonic acid (GalH) or sodium D(+)-galacturonate (GalNa) by use of a recirculating apparatus at 313.4 K and at pressures up to 9.29 MPa. The solubilities of CO2 in the two solutions containing Gales or GalNa were similar to those in pure water. The experimental data were correlated with the Peng-Robinson-Stryjek-Vera (PRSV) equation of state. A new method was developed to estimate pH by use of the molar volume from the PRSV equation and compared with measured pH values. It gives some idea of the quantitative agreement between the equation of states and the measured pH values over the same range of conditions. (C) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.fluid.2017.03.005

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  • Measurement and correlation of the diffusion coefficients of chromium (III) acetylacetonate at infinite dilution in supercritical carbon dioxide and in liquid ethanol

    Chang Yi Kong, Kou Watanabe, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL THERMODYNAMICS   105   86 - 93   2017.2

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    Language:English   Publisher:ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD  

    The diffusion coefficients of chromium(III) acetylacetonate (Cr(acac)(3)) were measured at infinite dilution in supercritical carbon dioxide and in liquid ethanol. The diffusion measurements in supercritical carbon dioxide were carried out at five different temperatures varying from T= (308.15 to 343.15) K and at pressures up to 40.00 MPa by using the chromatographic impulse response (CIR) method. And the measurements in liquid ethanol were also made by the Taylor dispersion method at five temperatures in the range from T= (299.15 to 333.15) K and 0.10 MPa. The determined diffusion activation energies in supercritical carbon dioxide were E-a = (22.9-11.2) kJ.mol(-1) at p = (13.00-35.00) MPa, respectively, and that in liquid ethanol was 15.9 kJ.mol(-1) at 0.10 MPa. All the diffusion coefficients of Cr(acac)(3) in supercritical and in liquid states can be correlated by the hydrodynamic equation as a function of temperature and fluid viscosity with average absolute relative deviation (AARD) of 4.6% over a wide viscosity range from eta = (3.036.10(-5) to 1.113.10(-3)) Pa.s for 85 data points. (C) 2016 Elsevier Ltd.

    DOI: 10.1016/j.jct.2016.10.012

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  • Measurement and correlation of the diffusion coefficients of chromium (III) acetylacetonate at infinite dilution in supercritical carbon dioxide and in liquid ethanol

    Chang Yi Kong, Kou Watanabe, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL THERMODYNAMICS   105   86 - 93   2017.2

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    The diffusion coefficients of chromium(III) acetylacetonate (Cr(acac)(3)) were measured at infinite dilution in supercritical carbon dioxide and in liquid ethanol. The diffusion measurements in supercritical carbon dioxide were carried out at five different temperatures varying from T= (308.15 to 343.15) K and at pressures up to 40.00 MPa by using the chromatographic impulse response (CIR) method. And the measurements in liquid ethanol were also made by the Taylor dispersion method at five temperatures in the range from T= (299.15 to 333.15) K and 0.10 MPa. The determined diffusion activation energies in supercritical carbon dioxide were E-a = (22.9-11.2) kJ.mol(-1) at p = (13.00-35.00) MPa, respectively, and that in liquid ethanol was 15.9 kJ.mol(-1) at 0.10 MPa. All the diffusion coefficients of Cr(acac)(3) in supercritical and in liquid states can be correlated by the hydrodynamic equation as a function of temperature and fluid viscosity with average absolute relative deviation (AARD) of 4.6% over a wide viscosity range from eta = (3.036.10(-5) to 1.113.10(-3)) Pa.s for 85 data points. (C) 2016 Elsevier Ltd.

    DOI: 10.1016/j.jct.2016.10.012

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  • Measurement and correlation of the diffusion coefficients of chromium (III) acetylacetonate at infinite dilution in supercritical carbon dioxide and in liquid ethanol

    Chang Yi Kong, Kou Watanabe, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL THERMODYNAMICS   105   86 - 93   2017.2

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    Language:English   Publisher:ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD  

    The diffusion coefficients of chromium(III) acetylacetonate (Cr(acac)(3)) were measured at infinite dilution in supercritical carbon dioxide and in liquid ethanol. The diffusion measurements in supercritical carbon dioxide were carried out at five different temperatures varying from T= (308.15 to 343.15) K and at pressures up to 40.00 MPa by using the chromatographic impulse response (CIR) method. And the measurements in liquid ethanol were also made by the Taylor dispersion method at five temperatures in the range from T= (299.15 to 333.15) K and 0.10 MPa. The determined diffusion activation energies in supercritical carbon dioxide were E-a = (22.9-11.2) kJ.mol(-1) at p = (13.00-35.00) MPa, respectively, and that in liquid ethanol was 15.9 kJ.mol(-1) at 0.10 MPa. All the diffusion coefficients of Cr(acac)(3) in supercritical and in liquid states can be correlated by the hydrodynamic equation as a function of temperature and fluid viscosity with average absolute relative deviation (AARD) of 4.6% over a wide viscosity range from eta = (3.036.10(-5) to 1.113.10(-3)) Pa.s for 85 data points. (C) 2016 Elsevier Ltd.

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  • Measurement and correlation of the diffusion coefficients of chromium (III) acetylacetonate at infinite dilution in supercritical carbon dioxide and in liquid ethanol Reviewed

    Changi Yi Kong, Kou Watanabe, Toshitaka Funazukuri

    Journal of Chemical Thermodynamics   105   86 - 93   2016.10

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    DOI: 10.1016/j.jct.2016.10.012

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  • Correlation of the Product Yield with the Total Organic Carbon Yield in the Hydrothermal Conversion of Pure Celluloses in the Absence of Additives

    Toshitaka Funazukuri, Yuki Asaoka, Kengo Hirajima, Minori Taguchi

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   55 ( 35 )   9372 - 9377   2016.9

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    Three cellulosic samples (CP, cellulose powder; CC, cotton cellulose; FP, filter paper) were subjected to liquid water at 493 to 553 K and 10 MPa in a semibatch reactor. The solubilization rates based on the total organic carbon (TOC) yield were determined as first order reaction kinetics, and the rates for CP were 2-4 times higher than those for CC and FP. The yields of the products, such as glucose, cellooligosaccharides with degrees of polymerization (DP) from 2 to 9, fructose, 5-(hydroxymethyl)furfural, and levoglucosan, were proportional to the TOC of the products over nearly the entire range of conversion, irrespective of the reaction temperature. The slopes in the plots of the product yield versus TOC yield were correlated with DP of up to 9, and the correlations for CP, CC, and FP were consistent and independent of the temperature and cellulose species.

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  • CeO2 nanocatalysts for the chemical recycling of polycarbonate

    Minori Taguchi, Yuki Ishikawa, Shiho Kataoka, Takashi Naka, Toshitaka Funazukuri

    CATALYSIS COMMUNICATIONS   84   93 - 97   2016.9

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    A novel catalytic property of CeO2 and its nanocrystals is discovered, and a simple chemical recycling technique for the conversion of poly(bisphenol A) carbonate (PC) to the contexture monomer (bisphenol A) under hydro thermal conditions in the presence of heterogeneous CeO2 catalyst using a batch reactor is proposed. The PC is completely depolymerized under these conditions in the presence of large CeO2 crystal with 75 nm crystallite size at 200 degrees C for 5 h. When CeO2 nanocrystals approximately 7.4 nm crystallite size are used, the catalyst amount, reaction temperature, and time required to completely depolymerize the PC are reduced compared with the experimental conditions using large crystal; the maximum monomer (bisphenol A) yield is approximately 90%. The depolymerization reaction of PC correlates directly with the surface-to-volume ratio. Further decomposition of the monomer is inhibited by reducing and/or controlling the amount of the catalyst, reaction temperature, and time. (C) 2016 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.catcom.2016.06.009

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  • CeO2 nanocatalysts for the chemical recycling of polycarbonate

    Minori Taguchi, Yuki Ishikawa, Shiho Kataoka, Takashi Naka, Toshitaka Funazukuri

    CATALYSIS COMMUNICATIONS   84   93 - 97   2016.9

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    A novel catalytic property of CeO2 and its nanocrystals is discovered, and a simple chemical recycling technique for the conversion of poly(bisphenol A) carbonate (PC) to the contexture monomer (bisphenol A) under hydro thermal conditions in the presence of heterogeneous CeO2 catalyst using a batch reactor is proposed. The PC is completely depolymerized under these conditions in the presence of large CeO2 crystal with 75 nm crystallite size at 200 degrees C for 5 h. When CeO2 nanocrystals approximately 7.4 nm crystallite size are used, the catalyst amount, reaction temperature, and time required to completely depolymerize the PC are reduced compared with the experimental conditions using large crystal; the maximum monomer (bisphenol A) yield is approximately 90%. The depolymerization reaction of PC correlates directly with the surface-to-volume ratio. Further decomposition of the monomer is inhibited by reducing and/or controlling the amount of the catalyst, reaction temperature, and time. (C) 2016 Elsevier B.V. All rights reserved.

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  • Correlation of the Product Yield with the Total Organic Carbon Yield in the Hydrothermal Conversion of Pure Celluloses in the Absence of Additives

    Toshitaka Funazukuri, Yuki Asaoka, Kengo Hirajima, Minori Taguchi

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   55 ( 35 )   9372 - 9377   2016.9

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    Three cellulosic samples (CP, cellulose powder; CC, cotton cellulose; FP, filter paper) were subjected to liquid water at 493 to 553 K and 10 MPa in a semibatch reactor. The solubilization rates based on the total organic carbon (TOC) yield were determined as first order reaction kinetics, and the rates for CP were 2-4 times higher than those for CC and FP. The yields of the products, such as glucose, cellooligosaccharides with degrees of polymerization (DP) from 2 to 9, fructose, 5-(hydroxymethyl)furfural, and levoglucosan, were proportional to the TOC of the products over nearly the entire range of conversion, irrespective of the reaction temperature. The slopes in the plots of the product yield versus TOC yield were correlated with DP of up to 9, and the correlations for CP, CC, and FP were consistent and independent of the temperature and cellulose species.

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  • 超臨界流体クロマトグラフィーを用いた物性測定 Reviewed

    船造俊孝

    生物工学会誌   94 ( 7 )   402 - 404   2016.7

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  • Determination and correlation of infinite dilution binary diffusion coefficients for aluminum acetylacetonate in supercritical and liquid fluids

    Chang Yi Kong, Kou Watanabe, Toshitaka Funazukuri

    FLUID PHASE EQUILIBRIA   420   83 - 88   2016.7

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    The infinite dilution binary diffusion coefficients D-12 for aluminum acetylacetonate in supercritical CO2 were determined at 308.15-333.15 K and at 7.80-40.00 MPa by the chromatographic impulse response (CIR) method. And, the diffusion measurements in liquid ethanol were carried out at 300.15-333.15 K and at 0.10 and 30.00 MPa by the Taylor dispersion method. It was found that the D-12 values measured in supercritical CO2 show slowing down in the region of near critical point. The determined activation energies of diffusion were 23.0, 13.7, 12.0, 11.3 kJ/mol at 12.00, 20.00, 25.00, 35.00 MPa in supercritical CO2 and 19.1 kJ/mol at 0.10 MPa in liquid ethanol, respectively. All determined 90 diffusion data in this study can be correlated with the equation of D-12 [m(2)/S] = 1.558 x 10(-14) T [K] eta [Pa s](-0.761) with average absolute relative deviation (AARD) of 5.6% over a wide fluid viscosity range from 2.462 x 10(-5) to 1.258 x 10(-3) Pa s. (C) 2016 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.fluid.2016.01.042

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  • Determination and correlation of infinite dilution binary diffusion coefficients for aluminum acetylacetonate in supercritical and liquid fluids

    Chang Yi Kong, Kou Watanabe, Toshitaka Funazukuri

    FLUID PHASE EQUILIBRIA   420   83 - 88   2016.7

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    The infinite dilution binary diffusion coefficients D-12 for aluminum acetylacetonate in supercritical CO2 were determined at 308.15-333.15 K and at 7.80-40.00 MPa by the chromatographic impulse response (CIR) method. And, the diffusion measurements in liquid ethanol were carried out at 300.15-333.15 K and at 0.10 and 30.00 MPa by the Taylor dispersion method. It was found that the D-12 values measured in supercritical CO2 show slowing down in the region of near critical point. The determined activation energies of diffusion were 23.0, 13.7, 12.0, 11.3 kJ/mol at 12.00, 20.00, 25.00, 35.00 MPa in supercritical CO2 and 19.1 kJ/mol at 0.10 MPa in liquid ethanol, respectively. All determined 90 diffusion data in this study can be correlated with the equation of D-12 [m(2)/S] = 1.558 x 10(-14) T [K] eta [Pa s](-0.761) with average absolute relative deviation (AARD) of 5.6% over a wide fluid viscosity range from 2.462 x 10(-5) to 1.258 x 10(-3) Pa s. (C) 2016 Elsevier B.V. All rights reserved.

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  • Determination and correlation of infinite dilution binary diffusion coefficients for aluminum acetylacetonate in supercritical and liquid fluids

    Chang Yi Kong, Kou Watanabe, Toshitaka Funazukuri

    FLUID PHASE EQUILIBRIA   420   83 - 88   2016.7

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    The infinite dilution binary diffusion coefficients D-12 for aluminum acetylacetonate in supercritical CO2 were determined at 308.15-333.15 K and at 7.80-40.00 MPa by the chromatographic impulse response (CIR) method. And, the diffusion measurements in liquid ethanol were carried out at 300.15-333.15 K and at 0.10 and 30.00 MPa by the Taylor dispersion method. It was found that the D-12 values measured in supercritical CO2 show slowing down in the region of near critical point. The determined activation energies of diffusion were 23.0, 13.7, 12.0, 11.3 kJ/mol at 12.00, 20.00, 25.00, 35.00 MPa in supercritical CO2 and 19.1 kJ/mol at 0.10 MPa in liquid ethanol, respectively. All determined 90 diffusion data in this study can be correlated with the equation of D-12 [m(2)/S] = 1.558 x 10(-14) T [K] eta [Pa s](-0.761) with average absolute relative deviation (AARD) of 5.6% over a wide fluid viscosity range from 2.462 x 10(-5) to 1.258 x 10(-3) Pa s. (C) 2016 Elsevier B.V. All rights reserved.

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  • Measurement of binary diffusion coefficient and solubility estimation for dyes in supercritical carbon dioxide by CIR method

    Toshitaka Funazukuri, Taichi Yamasaki, Minori Taguchi, Chang Yi Kong

    FLUID PHASE EQUILIBRIA   420   7 - 13   2016.7

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    Infinite dilution binary diffusion coefficients (D-12) of two dyestuffs, disperse blue 14 (DB14) and disperse orange 11 (DO11), were measured in supercritical CO2 at 310-330 K and up to 35 MPa by the chromatographic impulse response (CIR) method and in liquid methanol and ethanol at 308-328 K and atmospheric pressure by the Taylor dispersion method. The retention factors (k) were also measured by the CIR method. The diffusion coefficients were well represented by a hydrodynamic equation, as a function of temperature and solvent viscosity, over a wide range of solvent viscosity from scCO(2) to liquid solvents with average absolute relative deviations (AARDs) of 1.7% and 2.6% for 63 and 93 data points of DB14 and DO11, respectively. The solubility data for the two dyestuffs reported in the literature were well correlated with solute retention factor measured in the present study and solvent density with AARD of 7.05% for DB 14 of 109 data points and that of 15.4% for DO11 of 43 data points. (C) 2016 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.fluid.2016.01.010

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  • Measurement of binary diffusion coefficient and solubility estimation for dyes in supercritical carbon dioxide by CIR method

    Toshitaka Funazukuri, Taichi Yamasaki, Minori Taguchi, Chang Yi Kong

    FLUID PHASE EQUILIBRIA   420   7 - 13   2016.7

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    Infinite dilution binary diffusion coefficients (D-12) of two dyestuffs, disperse blue 14 (DB14) and disperse orange 11 (DO11), were measured in supercritical CO2 at 310-330 K and up to 35 MPa by the chromatographic impulse response (CIR) method and in liquid methanol and ethanol at 308-328 K and atmospheric pressure by the Taylor dispersion method. The retention factors (k) were also measured by the CIR method. The diffusion coefficients were well represented by a hydrodynamic equation, as a function of temperature and solvent viscosity, over a wide range of solvent viscosity from scCO(2) to liquid solvents with average absolute relative deviations (AARDs) of 1.7% and 2.6% for 63 and 93 data points of DB14 and DO11, respectively. The solubility data for the two dyestuffs reported in the literature were well correlated with solute retention factor measured in the present study and solvent density with AARD of 7.05% for DB 14 of 109 data points and that of 15.4% for DO11 of 43 data points. (C) 2016 Elsevier B.V. All rights reserved.

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  • Measurement of infinite dilution diffusion coefficients of vitamin K-3 in CO2 expanded methanol

    Toshitaka Funazukuri, Tomohito Sugihara, Kazuko Yui, Tomohiro Ishii, Minori Taguchi

    JOURNAL OF SUPERCRITICAL FLUIDS   108   19 - 25   2016.2

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    In the present study, the diffusion coefficients (D) of vitamin K-3 (2-methyl-1,4-naphthalenedione) in carbon dioxide-expanded liquid methanol were measured by the Taylor dispersion method close to the gas liquid saturation line at 313.2 K over nearly the entire range of carbon dioxide mole fractions (xCO(2)) from zero (pure methanol) to 0.89. Although the D values simply increased with increasing CO2 mole fractions when increasing the pressure, similar to the behavior of the expansion coefficients, there were two unique regions with respect to solvent density: from xCO(2) = 0 to ca. 0.44 (corresponding to the almost maximum solvent density at 313.2 K) and from this density to the critical point of the mixture. In the former region, the D values increased with increasing pressure (while the solvent density also increased) and in the latter region D increased with decreasing solvent density, while the density also decreased with increasing pressure or xCO(2). The resulting D values were less than those predicted by the hydrodynamic equation when using two constants determined for vitamin K-3 in supercritical CO2 and in organic solvents. The relative differences of diffusion coefficients, representing the deviations from the hydrodynamic equation, were almost proportional to the excess viscosity values. (C) 2015 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.supflu.2015.10.012

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  • Measurement of infinite dilution diffusion coefficients of vitamin K-3 in CO2 expanded methanol

    Toshitaka Funazukuri, Tomohito Sugihara, Kazuko Yui, Tomohiro Ishii, Minori Taguchi

    JOURNAL OF SUPERCRITICAL FLUIDS   108   19 - 25   2016.2

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    In the present study, the diffusion coefficients (D) of vitamin K-3 (2-methyl-1,4-naphthalenedione) in carbon dioxide-expanded liquid methanol were measured by the Taylor dispersion method close to the gas liquid saturation line at 313.2 K over nearly the entire range of carbon dioxide mole fractions (xCO(2)) from zero (pure methanol) to 0.89. Although the D values simply increased with increasing CO2 mole fractions when increasing the pressure, similar to the behavior of the expansion coefficients, there were two unique regions with respect to solvent density: from xCO(2) = 0 to ca. 0.44 (corresponding to the almost maximum solvent density at 313.2 K) and from this density to the critical point of the mixture. In the former region, the D values increased with increasing pressure (while the solvent density also increased) and in the latter region D increased with decreasing solvent density, while the density also decreased with increasing pressure or xCO(2). The resulting D values were less than those predicted by the hydrodynamic equation when using two constants determined for vitamin K-3 in supercritical CO2 and in organic solvents. The relative differences of diffusion coefficients, representing the deviations from the hydrodynamic equation, were almost proportional to the excess viscosity values. (C) 2015 Elsevier B.V. All rights reserved.

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  • Influence of the crystal structure on the physical properties of monoclinic ZrO2 nanocrystals

    Minori Taguchi, Akiyuki Matsushita, Tetsuo Uchikoshi, Yoshio Sakka, Seiichi Takami, Toshitaka Funazukuri, Takashi Naka

    Nano-Structures and Nano-Objects   1   1 - 6   2015.10

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    The influence of the crystal structure on the physical properties of monoclinic ZrO2 nanocrystals is investigated by an annealing treatment. Monoclinic ZrO2 nanocrystals with diameters of approximately 20 nm are synthesized by a hydrothermal method using subcritical water. The nanocrystals have chemisorbed water molecules, hydroxides and nitro groups on their surfaces. The crystallographic structures are reformed by annealing the nanocrystals at 800 °C for 5 h. This treatment causes the crystallite sizes to increase, the crystal lattice to shrink and some of the molecules chemisorbed on the surfaces to be lost. The annealing treatment leads to there being fewer lattice defects, and to the modification of surface characteristics of the nanocrystals. The treatment also changes the optical absorption characteristics of the nanocrystals. The magnetic moments caused by lattice defects are identified.

    DOI: 10.1016/j.nanoso.2015.03.001

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  • Influence of the crystal structure on the physical properties of monoclinic ZrO2 nanocrystals

    Minori Taguchi, Akiyuki Matsushita, Tetsuo Uchikoshi, Yoshio Sakka, Seiichi Takami, Toshitaka Funazukuri, Takashi Naka

    Nano-Structures and Nano-Objects   1   1 - 6   2015.10

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    The influence of the crystal structure on the physical properties of monoclinic ZrO2 nanocrystals is investigated by an annealing treatment. Monoclinic ZrO2 nanocrystals with diameters of approximately 20 nm are synthesized by a hydrothermal method using subcritical water. The nanocrystals have chemisorbed water molecules, hydroxides and nitro groups on their surfaces. The crystallographic structures are reformed by annealing the nanocrystals at 800 °C for 5 h. This treatment causes the crystallite sizes to increase, the crystal lattice to shrink and some of the molecules chemisorbed on the surfaces to be lost. The annealing treatment leads to there being fewer lattice defects, and to the modification of surface characteristics of the nanocrystals. The treatment also changes the optical absorption characteristics of the nanocrystals. The magnetic moments caused by lattice defects are identified.

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  • Determination and correlation of infinite dilution binary diffusion coefficients for aluminum acetylacetonate in supercritical and liquid fluids

    Chang Yi Kong, Kou Watanabe, Toshitaka Funazukuri

    Fluid Phase Equilibria   420   83 - 88   2015.10

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    Language:English   Publisher:Elsevier B.V.  

    The infinite dilution binary diffusion coefficients D12 for aluminum acetylacetonate in supercritical CO2 were determined at 308.15–333.15 K and at 7.80–40.00 MPa by the chromatographic impulse response (CIR) method. And, the diffusion measurements in liquid ethanol were carried out at 300.15–333.15 K and at 0.10 and 30.00 MPa by the Taylor dispersion method. It was found that the D12 values measured in supercritical CO2 show slowing down in the region of near critical point. The determined activation energies of diffusion were 23.0, 13.7, 12.0, 11.3 kJ/mol at 12.00, 20.00, 25.00, 35.00 MPa in supercritical CO2 and 19.1 kJ/mol at 0.10 MPa in liquid ethanol, respectively. All determined 90 diffusion data in this study can be correlated with the equation of D12 [m2/s] = 1.558 Ã&#151
     10−14 T [K] η [Pa s]−0.761 with average absolute relative deviation (AARD) of 5.6% over a wide fluid viscosity range from 2.462 Ã&#151
     10−5 to 1.258 Ã&#151
     10−3 Pa s.

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  • 過渡応答法による超臨界流体中の化合物の拡散係数の測定および溶解度と部分モル体積の推算

    船造俊孝, 孔昌一

    高圧力の科学と技術   25 ( 3 )   208 - 214   2015.9

  • Measurement and correlation of binary diffusion coefficients of lithium acetylacetonate in supercritical carbon dioxide and in liquid ethanol

    Chang Yi Kong, Yoshiki Yakumaru, Toshitaka Funazukuri

    JOURNAL OF SUPERCRITICAL FLUIDS   104   265 - 271   2015.9

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    The infinite dilution binary diffusion coefficients D-12 of lithium acetylacetonate were measured in supercritical carbon dioxide by the chromatographic impulse response (CIR) method at 308.15-333.15K and pressures up to 36.00 MPa. The D-12 values were also measured in liquid ethanol at 298.15-333.15K, and at 0.10, 10.00 and 30.00 MPa by the Taylor dispersion method. The effects of temperature, pressure and density of fluid on D-12 values were studied. The D-12 data increased from 1.140 x 10(-9) m(2) s(-1) in liquid ethanol at 298.15K and 30.00 MPa to 2.218 x 10(-8) m(2) s(-1) in supercritical carbon dioxide at 333.15 K and 14.00 MPa. It was observed that the D-12 data in supercritical carbon dioxide at 15.00, 20.00 and 30.00 MPa can be well correlated as a function of temperature using an Arrhenius type equation, which provided the diffusion activation energies of 17.5, 13.4 and 11.0 kJ mol(-1); that in liquid ethanol at 0.10,10.00,30.00 MPa gave the diffusion activation energies of 14.0, 14.2 and 13.8 kJ mol(-1), respectively. It was found that the proposed correlation based on hydrodynamic approach can well represent all the measured D-12 data of lithium acetylacetonate in supercritical carbon dioxide and in liquid ethanol with the average absolute relative deviation (AARD) of 1.7% for 88 data points. (C) 2015 Elsevier B.V. All rights reserved.

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  • Measurement and correlation of binary diffusion coefficients of lithium acetylacetonate in supercritical carbon dioxide and in liquid ethanol

    Chang Yi Kong, Yoshiki Yakumaru, Toshitaka Funazukuri

    JOURNAL OF SUPERCRITICAL FLUIDS   104   265 - 271   2015.9

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    The infinite dilution binary diffusion coefficients D-12 of lithium acetylacetonate were measured in supercritical carbon dioxide by the chromatographic impulse response (CIR) method at 308.15-333.15K and pressures up to 36.00 MPa. The D-12 values were also measured in liquid ethanol at 298.15-333.15K, and at 0.10, 10.00 and 30.00 MPa by the Taylor dispersion method. The effects of temperature, pressure and density of fluid on D-12 values were studied. The D-12 data increased from 1.140 x 10(-9) m(2) s(-1) in liquid ethanol at 298.15K and 30.00 MPa to 2.218 x 10(-8) m(2) s(-1) in supercritical carbon dioxide at 333.15 K and 14.00 MPa. It was observed that the D-12 data in supercritical carbon dioxide at 15.00, 20.00 and 30.00 MPa can be well correlated as a function of temperature using an Arrhenius type equation, which provided the diffusion activation energies of 17.5, 13.4 and 11.0 kJ mol(-1); that in liquid ethanol at 0.10,10.00,30.00 MPa gave the diffusion activation energies of 14.0, 14.2 and 13.8 kJ mol(-1), respectively. It was found that the proposed correlation based on hydrodynamic approach can well represent all the measured D-12 data of lithium acetylacetonate in supercritical carbon dioxide and in liquid ethanol with the average absolute relative deviation (AARD) of 1.7% for 88 data points. (C) 2015 Elsevier B.V. All rights reserved.

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  • Hydrothermal depolymerization of polyesters and polycarbonate in the presence of ammonia and amines in Recycling Materials Based on Environmentally Friendly Techniques. Reviewed

    T. Funazukuri

    Recycling Materials Based on Environmentally Friendly Techniques.   17 - 36   2015.7

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  • Hydrothermal depolymerization of polyesters and polycarbonate in the presence of ammonia and amines in Recycling Materials Based on Environmentally Friendly Techniques.

    T. Funazukuri

    Recycling Materials Based on Environmentally Friendly Techniques.   17 - 36   2015.7

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  • Semibatch Hydrothermal Hydrolysis of Cellulose in a Filter Paper by Dilute Organic Acids

    Kengo Hirajima, Minori Taguchi, Toshitaka Funazukuri

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   54 ( 22 )   6052 - 6059   2015.6

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    Cellulose in a filter paper is hydrolyzed by six dilute organic acids (0.01-1 wt %) under hydrothermal conditions (260 degrees C and 5 MPa) using a semibatch reactor. The rate of degradation increases with an increase in the concentration of the acid. The cellulose sample is completely degraded by the acids (1 wt %) in 60 min. While the yields of the different products are dependent on the nature of the organic acid used, cellulose is essentially converted to mono- and oligosaccharides, with glucose as the major product. The observed increase in the rate of degradation in the presence of formic or citric acid at 1 wt % allows for the degradation of the cellulose sample in a short time (20 min) and results in the highest yield of glucose (approximately 60%) observed in this study. The rate of conversion of the cellulose sample to glucose correlates directly with [H+].

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  • Semibatch Hydrothermal Hydrolysis of Cellulose in a Filter Paper by Dilute Organic Acids

    Kengo Hirajima, Minori Taguchi, Toshitaka Funazukuri

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   54 ( 22 )   6052 - 6059   2015.6

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    Cellulose in a filter paper is hydrolyzed by six dilute organic acids (0.01-1 wt %) under hydrothermal conditions (260 degrees C and 5 MPa) using a semibatch reactor. The rate of degradation increases with an increase in the concentration of the acid. The cellulose sample is completely degraded by the acids (1 wt %) in 60 min. While the yields of the different products are dependent on the nature of the organic acid used, cellulose is essentially converted to mono- and oligosaccharides, with glucose as the major product. The observed increase in the rate of degradation in the presence of formic or citric acid at 1 wt % allows for the degradation of the cellulose sample in a short time (20 min) and results in the highest yield of glucose (approximately 60%) observed in this study. The rate of conversion of the cellulose sample to glucose correlates directly with [H+].

    DOI: 10.1021/acs.iecr.5b00920

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  • Hydrothermal Conversion of Poly(ethylene naphthalate) to Naphthalene Dicarboxylic Acid and Ethylene Glycol in the Presence of Trimethylamine

    Natsumi Wakabayashi, Minori Taguchi, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN   47 ( 12 )   908 - 913   2014.12

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    Poly(ethylene naphthalate) (PEN) pellets were converted to monomers (naphthalene dicarboxylic acid (NDC) and ethylene glycol (EG)) in an aqueous amine solution under hydrothermal conditions using a small semi-batch reactor. Three amines (methylamine, dimethylamine, and trimethylamine) were evaluated as reactants for depolymerization of PEN and compared with ammonia. The total yield of both monomers (NDC + EG) on the basis of the carbon mass of the initial PEN pellets, at 493 K and 5.0 MPa, for a reaction time of 50 min, using an amine concentration of 0.6 mol/kg was highest with trimethylamine (97.2%) followed by methylamine (86.6%) and dimethylamine (89.8%) in succession. The differences in the total yields resulted primarily from the differences in the NDC yields, and were affected by the amine species, although the EG yield was similar with all amines. The yields were higher than 95% of the theoretical value with all evaluated amines. The difference in the yields may be affected by the stabilities of the intermediate products with the primary and secondary amines in the aqueous solutions. The reaction rates with respect to the unreacted mass of PEN were represented by the surface reaction model, i.e., 2/3rd order reaction kinetics, as previously observed for poly(ethylene terephthalate) in aqueous solutions of ammonia and amine at low concentrations. The apparent rate constant from the surface reaction model was proportional to the amine concentration.

    DOI: 10.1252/jcej.14we065

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  • Role of water in complexation of 1,4,7,10,13,16-hexaoxacyclooctadecane (18-crown-6) with Li+ and K+ in hydrophobic 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide ionic liquid

    Tatsuya Umecky, Toshiyuki Takamuku, Ryo Kanzaki, Masaya Takagi, Eiji Kawai, Tomoya Matsumoto, Toshitaka Funazukuri

    JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY   80 ( 3-4 )   401 - 407   2014.12

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    Complexation characteristics of 1,4,7,10,13,16-hexaoxacyclooctadecane (18-crown-6, 18C6) with Li+ and K+ in a hydrophobic ionic liquid of 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl) amide under dry and humid conditions at 298.2 K were studied by H-1 and C-13 NMR chemical shifts. The comparison of the H-1 and C-13 chemical shifts of 18C6 molecule between the dry and humid IL solutions without the alkali metal ions showed that uncomplexed 18C6 molecules are solvated by water molecules in the humid ionic liquid solution. The changes in the H-1 and C-13 chemical shifts of 18C6 ligand molecule with the increases in the Li+ and K+ concentrations revealed that in both dry and humid ionic liquid solutions 18C6 molecule forms 1:1 complexes with Li+ and K+. The H-1 NMR data of water molecules in the humid ionic liquid solutions demonstrated that water molecules interact with Li+-18C6 complexes and free Li+, but do not with K+-18C6 complexes and free K+. The mechanisms of the formation of the Li+ and K+ complexes in the humid ionic liquid solution are different from each other due to the differences in the complex-water interactions.

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  • Role of water in complexation of 1,4,7,10,13,16-hexaoxacyclooctadecane (18-crown-6) with Li+ and K+ in hydrophobic 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide ionic liquid

    Tatsuya Umecky, Toshiyuki Takamuku, Ryo Kanzaki, Masaya Takagi, Eiji Kawai, Tomoya Matsumoto, Toshitaka Funazukuri

    JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY   80 ( 3-4 )   401 - 407   2014.12

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    Complexation characteristics of 1,4,7,10,13,16-hexaoxacyclooctadecane (18-crown-6, 18C6) with Li+ and K+ in a hydrophobic ionic liquid of 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl) amide under dry and humid conditions at 298.2 K were studied by H-1 and C-13 NMR chemical shifts. The comparison of the H-1 and C-13 chemical shifts of 18C6 molecule between the dry and humid IL solutions without the alkali metal ions showed that uncomplexed 18C6 molecules are solvated by water molecules in the humid ionic liquid solution. The changes in the H-1 and C-13 chemical shifts of 18C6 ligand molecule with the increases in the Li+ and K+ concentrations revealed that in both dry and humid ionic liquid solutions 18C6 molecule forms 1:1 complexes with Li+ and K+. The H-1 NMR data of water molecules in the humid ionic liquid solutions demonstrated that water molecules interact with Li+-18C6 complexes and free Li+, but do not with K+-18C6 complexes and free K+. The mechanisms of the formation of the Li+ and K+ complexes in the humid ionic liquid solution are different from each other due to the differences in the complex-water interactions.

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  • Hydrothermal Conversion of Poly(ethylene naphthalate) to Naphthalene Dicarboxylic Acid and Ethylene Glycol in the Presence of Trimethylamine

    Natsumi Wakabayashi, Minori Taguchi, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN   47 ( 12 )   908 - 913   2014.12

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    Poly(ethylene naphthalate) (PEN) pellets were converted to monomers (naphthalene dicarboxylic acid (NDC) and ethylene glycol (EG)) in an aqueous amine solution under hydrothermal conditions using a small semi-batch reactor. Three amines (methylamine, dimethylamine, and trimethylamine) were evaluated as reactants for depolymerization of PEN and compared with ammonia. The total yield of both monomers (NDC + EG) on the basis of the carbon mass of the initial PEN pellets, at 493 K and 5.0 MPa, for a reaction time of 50 min, using an amine concentration of 0.6 mol/kg was highest with trimethylamine (97.2%) followed by methylamine (86.6%) and dimethylamine (89.8%) in succession. The differences in the total yields resulted primarily from the differences in the NDC yields, and were affected by the amine species, although the EG yield was similar with all amines. The yields were higher than 95% of the theoretical value with all evaluated amines. The difference in the yields may be affected by the stabilities of the intermediate products with the primary and secondary amines in the aqueous solutions. The reaction rates with respect to the unreacted mass of PEN were represented by the surface reaction model, i.e., 2/3rd order reaction kinetics, as previously observed for poly(ethylene terephthalate) in aqueous solutions of ammonia and amine at low concentrations. The apparent rate constant from the surface reaction model was proportional to the amine concentration.

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  • Infinite dilution partial molar volumes of platinum(II) 2,4-pentanedionate in supercritical carbon dioxide

    Chang Yi Kong, Tomoya Siratori, Toshitaka Funazukuri, Guosheng Wang

    JOURNAL OF CHROMATOGRAPHY A   1362   294 - 300   2014.10

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    The effects of temperature and density on retention of platinum(II) 2,4-pentanedionate in supercritical fluid chromatography were investigated at temperatures of 308.15-343.15 K and pressure range from 8 to 40 MPa by the chromatographic impulse response method with curve fitting. The retention factors were utilized to derive the infinite dilution partial molar volumes of platinum(II) 2,4-pentanedionate in supercritical carbon dioxide. The determined partial molar volumes were small and positive at high pressures but exhibited very large and negative values in the highly compressible near critical region of carbon dioxide. (C) 2014 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.chroma.2014.08.021

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  • Infinite dilution partial molar volumes of platinum(II) 2,4-pentanedionate in supercritical carbon dioxide

    Chang Yi Kong, Tomoya Siratori, Toshitaka Funazukuri, Guosheng Wang

    JOURNAL OF CHROMATOGRAPHY A   1362   294 - 300   2014.10

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    The effects of temperature and density on retention of platinum(II) 2,4-pentanedionate in supercritical fluid chromatography were investigated at temperatures of 308.15-343.15 K and pressure range from 8 to 40 MPa by the chromatographic impulse response method with curve fitting. The retention factors were utilized to derive the infinite dilution partial molar volumes of platinum(II) 2,4-pentanedionate in supercritical carbon dioxide. The determined partial molar volumes were small and positive at high pressures but exhibited very large and negative values in the highly compressible near critical region of carbon dioxide. (C) 2014 Elsevier B.V. All rights reserved.

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  • Chemical recycling of polycarbonate in dilute aqueous ammonia solution under hydrothermal conditions

    Kouhei Hatakeyama, Tomoharu Kojima, Toshitaka Funazukuri

    JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT   16 ( 1 )   124 - 130   2014.2

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    Polycarbonate (PC) pellets were subjected to dilute aqueous ammonia solution under hydrothermal conditions in a semi-batch reactor at temperatures ranging from 433 to 463 K and at a pressure of 10 MPa. The PC pellets were almost completely converted to bisphenol A (BPA). During an initial certain period, referred to as an induction time, neither BPA nor total organic carbon in solution were detected, and the BPA yield increased with time. The monomer yield was well represented by a surface reaction model, two-thirds-order reaction with respect to the mass of unreacted PC. The overall rate constant of the reaction in 0.6 mol/kg aqueous ammonia solution at 433 K was about 15 times greater than that in 0.6 mol/kg NaOH solution. The rate constant at 433 K was proportional to the ammonia or NaOH concentration. There was a correlation between the induction time and temperature, as well as the ammonia or NaOH concentration. By carrying out the reaction in aqueous mixtures of (NH4)(2)SO4 and NaOH at various concentrations of NaOH, ammonia was confirmed not to function as an alkaline reagent, but as a nucleophile reagent.

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  • Chemical recycling of polycarbonate in dilute aqueous ammonia solution under hydrothermal conditions

    Kouhei Hatakeyama, Tomoharu Kojima, Toshitaka Funazukuri

    JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT   16 ( 1 )   124 - 130   2014.2

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    Polycarbonate (PC) pellets were subjected to dilute aqueous ammonia solution under hydrothermal conditions in a semi-batch reactor at temperatures ranging from 433 to 463 K and at a pressure of 10 MPa. The PC pellets were almost completely converted to bisphenol A (BPA). During an initial certain period, referred to as an induction time, neither BPA nor total organic carbon in solution were detected, and the BPA yield increased with time. The monomer yield was well represented by a surface reaction model, two-thirds-order reaction with respect to the mass of unreacted PC. The overall rate constant of the reaction in 0.6 mol/kg aqueous ammonia solution at 433 K was about 15 times greater than that in 0.6 mol/kg NaOH solution. The rate constant at 433 K was proportional to the ammonia or NaOH concentration. There was a correlation between the induction time and temperature, as well as the ammonia or NaOH concentration. By carrying out the reaction in aqueous mixtures of (NH4)(2)SO4 and NaOH at various concentrations of NaOH, ammonia was confirmed not to function as an alkaline reagent, but as a nucleophile reagent.

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  • One-pot synthesis of monoclinic ZrO2 nanocrystals under subcritical hydrothermal conditions

    Minori Taguchi, Takayuki Nakane, Akiyuki Matsushita, Yoshio Sakka, Tetsuo Uchikoshi, Toshitaka Funazukuri, Takashi Naka

    JOURNAL OF SUPERCRITICAL FLUIDS   85   57 - 61   2014.1

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    This study reports a one-pot synthesis technique for the preparation of single-phase monoclinic zirconium oxide (ZrO2) nanocrystals. The products were synthesized from only zirconium oxynitrate (ZrO(NO3)(2)) as the precursor under hydrothermal conditions using subcritical water. The precursor was heat-treated in a batch-type reactor at a reaction temperature of 250 degrees C for 24 h to obtain pure monoclinic-structured ZrO2 nanocrystals. The crystallization temperature of the ZrO2 phase was also greater than 200 degrees C. However, the products of reactions conducted at 200 degrees C for 24 h were mixtures of the tetragonal and monoclinic structures. At a reaction temperature of 250 degrees C, the volume fraction of the monoclinic phase increased; however, the reaction time was also important. The heat-treatment was performed for more than 12 h in order to obtain single-phase monoclinic ZrO2 nanocrystals. The crystallite size of this product was approximately 20 nm, and water, hydroxide groups, and nitro groups were chemisorbed on its surface. (C) 2013 Elsevier B.V. All rights reserved.

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  • One-pot synthesis of monoclinic ZrO2 nanocrystals under subcritical hydrothermal conditions

    Minori Taguchi, Takayuki Nakane, Akiyuki Matsushita, Yoshio Sakka, Tetsuo Uchikoshi, Toshitaka Funazukuri, Takashi Naka

    JOURNAL OF SUPERCRITICAL FLUIDS   85   57 - 61   2014.1

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    This study reports a one-pot synthesis technique for the preparation of single-phase monoclinic zirconium oxide (ZrO2) nanocrystals. The products were synthesized from only zirconium oxynitrate (ZrO(NO3)(2)) as the precursor under hydrothermal conditions using subcritical water. The precursor was heat-treated in a batch-type reactor at a reaction temperature of 250 degrees C for 24 h to obtain pure monoclinic-structured ZrO2 nanocrystals. The crystallization temperature of the ZrO2 phase was also greater than 200 degrees C. However, the products of reactions conducted at 200 degrees C for 24 h were mixtures of the tetragonal and monoclinic structures. At a reaction temperature of 250 degrees C, the volume fraction of the monoclinic phase increased; however, the reaction time was also important. The heat-treatment was performed for more than 12 h in order to obtain single-phase monoclinic ZrO2 nanocrystals. The crystallite size of this product was approximately 20 nm, and water, hydroxide groups, and nitro groups were chemisorbed on its surface. (C) 2013 Elsevier B.V. All rights reserved.

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  • One-pot synthesis of monoclinic ZrO2 nanocrystals under subcritical hydrothermal conditions

    Minori Taguchi, Takayuki Nakane, Akiyuki Matsushita, Yoshio Sakka, Tetsuo Uchikoshi, Toshitaka Funazukuri, Takashi Naka

    JOURNAL OF SUPERCRITICAL FLUIDS   85   57 - 61   2014.1

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    This study reports a one-pot synthesis technique for the preparation of single-phase monoclinic zirconium oxide (ZrO2) nanocrystals. The products were synthesized from only zirconium oxynitrate (ZrO(NO3)(2)) as the precursor under hydrothermal conditions using subcritical water. The precursor was heat-treated in a batch-type reactor at a reaction temperature of 250 degrees C for 24 h to obtain pure monoclinic-structured ZrO2 nanocrystals. The crystallization temperature of the ZrO2 phase was also greater than 200 degrees C. However, the products of reactions conducted at 200 degrees C for 24 h were mixtures of the tetragonal and monoclinic structures. At a reaction temperature of 250 degrees C, the volume fraction of the monoclinic phase increased; however, the reaction time was also important. The heat-treatment was performed for more than 12 h in order to obtain single-phase monoclinic ZrO2 nanocrystals. The crystallite size of this product was approximately 20 nm, and water, hydroxide groups, and nitro groups were chemisorbed on its surface. (C) 2013 Elsevier B.V. All rights reserved.

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  • One-pot synthesis of monoclinic ZrO2 nanocrystals under subcritical hydrothermal conditions

    Minori Taguchi, Takayuki Nakane, Akiyuki Matsushita, Yoshio Sakka, Tetsuo Uchikoshi, Toshitaka Funazukuri, Takashi Naka

    JOURNAL OF SUPERCRITICAL FLUIDS   85   57 - 61   2014.1

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    This study reports a one-pot synthesis technique for the preparation of single-phase monoclinic zirconium oxide (ZrO2) nanocrystals. The products were synthesized from only zirconium oxynitrate (ZrO(NO3)(2)) as the precursor under hydrothermal conditions using subcritical water. The precursor was heat-treated in a batch-type reactor at a reaction temperature of 250 degrees C for 24 h to obtain pure monoclinic-structured ZrO2 nanocrystals. The crystallization temperature of the ZrO2 phase was also greater than 200 degrees C. However, the products of reactions conducted at 200 degrees C for 24 h were mixtures of the tetragonal and monoclinic structures. At a reaction temperature of 250 degrees C, the volume fraction of the monoclinic phase increased; however, the reaction time was also important. The heat-treatment was performed for more than 12 h in order to obtain single-phase monoclinic ZrO2 nanocrystals. The crystallite size of this product was approximately 20 nm, and water, hydroxide groups, and nitro groups were chemisorbed on its surface. (C) 2013 Elsevier B.V. All rights reserved.

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  • Synthesis of monocarboxylic acid-modified CeO2 nanoparticles using supercritical water

    Minori Taguchi, Naomi Yamamoto, Daisuke Hojo, Seiichi Takami, Tadafumi Adschiri, Toshitaka Funazukuri, Takashi Naka

    RSC ADVANCES   4 ( 91 )   49605 - 49613   2014

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    This study reports a simple, rapid synthesis technique for the preparation of monocarboxylic acid-modified CeO2 nanoparticles. The nanoparticle products were prepared under hydrothermal conditions using supercritical water and Ce(OH)(4) as a precursor in the presence of monocarboxylic acids with different alkyl chain lengths (C6-18) acting as surface modifiers. The precursor and surface modifiers were heat-treated in a batch-type reactor at 400 degrees C for 30 min. The carboxylic acids attached to the surface of the products by coordination bonds between the carboxylate (-COO-) and Ce ions. The amount of attached surface modifiers tended to increase with increasing alkyl chain length. The products exhibited a cubic morphology and particle sizes of approximately 10 nm, controlled by the surface modifiers. Surface modification also controlled the band gap of the products, suggesting the possibility of tuning their electronic and optical properties by using organic surface modifiers.

    DOI: 10.1039/c4ra06936f

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  • Synthesis of monocarboxylic acid-modified CeO2 nanoparticles using supercritical water

    Minori Taguchi, Naomi Yamamoto, Daisuke Hojo, Seiichi Takami, Tadafumi Adschiri, Toshitaka Funazukuri, Takashi Naka

    RSC ADVANCES   4 ( 91 )   49605 - 49613   2014

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    This study reports a simple, rapid synthesis technique for the preparation of monocarboxylic acid-modified CeO2 nanoparticles. The nanoparticle products were prepared under hydrothermal conditions using supercritical water and Ce(OH)(4) as a precursor in the presence of monocarboxylic acids with different alkyl chain lengths (C6-18) acting as surface modifiers. The precursor and surface modifiers were heat-treated in a batch-type reactor at 400 degrees C for 30 min. The carboxylic acids attached to the surface of the products by coordination bonds between the carboxylate (-COO-) and Ce ions. The amount of attached surface modifiers tended to increase with increasing alkyl chain length. The products exhibited a cubic morphology and particle sizes of approximately 10 nm, controlled by the surface modifiers. Surface modification also controlled the band gap of the products, suggesting the possibility of tuning their electronic and optical properties by using organic surface modifiers.

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  • Effects of Dissolved Water on Li+ Solvation in 1-Ethyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)amide Ionic Liquid Studied by NMR

    Tatsuya Umecky, Toshiyuki Takamuku, Tomoya Matsumoto, Eiji Kawai, Masaya Takagi, Toshitaka Funazukuri

    JOURNAL OF PHYSICAL CHEMISTRY B   117 ( 50 )   16219 - 16226   2013.12

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    H-1 and Li-7 NMR chemical shifts of 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide-water solutions in the presence and absence of lithium bis(trifluoromethanesulfonyl)amide were determined at 293.2 K over a wide range of water concentrations from 0.0156 to 1.16 mol kg(-1). These results revealed the attractive interaction between water molecule and Li+ as well as the hydrogen bonding among water molecules. Moreover, self-diffusion coefficients of water, 1-ethyl-3-methylimidazolium cation, Li+, and bis(trifluoromethanesulfonyl)amide anion in the ionic liquid solutions at various water contents were determined by H-1, Li-7, and F-19 NMR techniques. It was found that Li+ is averagely hydrated by eight water molecules in the ionic liquid solutions. Furthermore, Li-7 longitudinal relaxation times of Li+ in the ionic liquid solutions at 293.2 K were measured with two different magnetic fields and various water contents. The mean one-jump distances of Li+ in the ionic liquid solutions were estimated from the correlation times and the self-diffusion coefficients. A comparison between the hydrodynamic radius and the mean one-jump distance of Li+ suggested the formation of water channels in the ionic liquid solutions.

    DOI: 10.1021/jp409324k

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  • Effects of Dissolved Water on Li+ Solvation in 1-Ethyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)amide Ionic Liquid Studied by NMR

    Tatsuya Umecky, Toshiyuki Takamuku, Tomoya Matsumoto, Eiji Kawai, Masaya Takagi, Toshitaka Funazukuri

    JOURNAL OF PHYSICAL CHEMISTRY B   117 ( 50 )   16219 - 16226   2013.12

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    H-1 and Li-7 NMR chemical shifts of 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide-water solutions in the presence and absence of lithium bis(trifluoromethanesulfonyl)amide were determined at 293.2 K over a wide range of water concentrations from 0.0156 to 1.16 mol kg(-1). These results revealed the attractive interaction between water molecule and Li+ as well as the hydrogen bonding among water molecules. Moreover, self-diffusion coefficients of water, 1-ethyl-3-methylimidazolium cation, Li+, and bis(trifluoromethanesulfonyl)amide anion in the ionic liquid solutions at various water contents were determined by H-1, Li-7, and F-19 NMR techniques. It was found that Li+ is averagely hydrated by eight water molecules in the ionic liquid solutions. Furthermore, Li-7 longitudinal relaxation times of Li+ in the ionic liquid solutions at 293.2 K were measured with two different magnetic fields and various water contents. The mean one-jump distances of Li+ in the ionic liquid solutions were estimated from the correlation times and the self-diffusion coefficients. A comparison between the hydrodynamic radius and the mean one-jump distance of Li+ suggested the formation of water channels in the ionic liquid solutions.

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  • Binary Diffusion Coefficients of Platinum(II) Acetylacetonate in Supercritical Carbon Dioxide

    Chang Yi Kong, Tomoya Siratori, Guosheng Wang, Takeshi Sako, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   58 ( 11 )   2919 - 2924   2013.11

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    Binary diffusion coefficients (D-12) and retention factors (k) of platinum(II) acetylacetonate at infinitesimal concentration in supercritical (sc) carbon dioxide (CO2) were measured by the chromatographic impulse response method with a poly(ethylene glycol) coated capillary column at temperatures from (308.15 to 343.15) K and pressures from (8.5 to 40.0) MPa, and D-12 in liquid ethanol at temperatures from (298.15 to 333.15) K and atmospheric pressure by the Taylor dispersion method. As has been seen for our previously reported data on other metal complexes measured in se CO2 and organic solvents, the D-12 data in sc CO2 and liquid ethanol were represented by a function of temperature and solvent viscosity. The D-12 values for metal complexes were not related to the solute molecular weights. The k values in sc CO2 were expressed by a function of temperature and CO2 density.

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  • Binary Diffusion Coefficients of Platinum(II) Acetylacetonate in Supercritical Carbon Dioxide

    Chang Yi Kong, Tomoya Siratori, Guosheng Wang, Takeshi Sako, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   58 ( 11 )   2919 - 2924   2013.11

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    Binary diffusion coefficients (D-12) and retention factors (k) of platinum(II) acetylacetonate at infinitesimal concentration in supercritical (sc) carbon dioxide (CO2) were measured by the chromatographic impulse response method with a poly(ethylene glycol) coated capillary column at temperatures from (308.15 to 343.15) K and pressures from (8.5 to 40.0) MPa, and D-12 in liquid ethanol at temperatures from (298.15 to 333.15) K and atmospheric pressure by the Taylor dispersion method. As has been seen for our previously reported data on other metal complexes measured in se CO2 and organic solvents, the D-12 data in sc CO2 and liquid ethanol were represented by a function of temperature and solvent viscosity. The D-12 values for metal complexes were not related to the solute molecular weights. The k values in sc CO2 were expressed by a function of temperature and CO2 density.

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  • Binary Diffusion Coefficients of Aqueous Straight-Chain Amino Acids at Infinitesimal Concentration and Temperatures from (298.2 to 333.2) K

    Kazuko Yui, Yuichiro Noda, Motonobu Koido, Mai Irie, Izumi Watanabe, Tatsuya Umecky, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   58 ( 10 )   2848 - 2853   2013.10

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    Mutual diffusion coefficients for aqueous solutions of 3-aminopropanoic acid (beta-alanine), 4-aminobutanoic acid (gamma-aminobutyric acid), 5-aminopentanoic acid, 6-aminohexanoic acid, and 7-aminoheptanoic acid at infinitesimal concentration were measured at atmospheric pressure and temperatures from (298.2 to 333.2) K using the Taylor dispersion method. The results were compared with those of the structural isomers measured in our previous studies to examine the effect of position of amino and carboxylic acid groups on the values of diffusion coefficients. The diffusion coefficients of all amino acid isomers were almost the same, indicating that the diffusion coefficients of amino acids measured in our studies were mostly determined by the molar mass and the increase in the distance between amino and carboxylic acid groups was not an important factor. The temperature dependences of the diffusion coefficients were well-correlated with viscosity of water, eta, as D-12/T = alpha eta(beta) where D-12 is the diffusion coefficient at infinitesimal concentration of solute, T is the absolute temperature, and alpha and beta are the fitting parameters.

    DOI: 10.1021/je301370s

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  • Binary Diffusion Coefficients of Aqueous Straight-Chain Amino Acids at Infinitesimal Concentration and Temperatures from (298.2 to 333.2) K

    Kazuko Yui, Yuichiro Noda, Motonobu Koido, Mai Irie, Izumi Watanabe, Tatsuya Umecky, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   58 ( 10 )   2848 - 2853   2013.10

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    Mutual diffusion coefficients for aqueous solutions of 3-aminopropanoic acid (beta-alanine), 4-aminobutanoic acid (gamma-aminobutyric acid), 5-aminopentanoic acid, 6-aminohexanoic acid, and 7-aminoheptanoic acid at infinitesimal concentration were measured at atmospheric pressure and temperatures from (298.2 to 333.2) K using the Taylor dispersion method. The results were compared with those of the structural isomers measured in our previous studies to examine the effect of position of amino and carboxylic acid groups on the values of diffusion coefficients. The diffusion coefficients of all amino acid isomers were almost the same, indicating that the diffusion coefficients of amino acids measured in our studies were mostly determined by the molar mass and the increase in the distance between amino and carboxylic acid groups was not an important factor. The temperature dependences of the diffusion coefficients were well-correlated with viscosity of water, eta, as D-12/T = alpha eta(beta) where D-12 is the diffusion coefficient at infinitesimal concentration of solute, T is the absolute temperature, and alpha and beta are the fitting parameters.

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  • Binary diffusion coefficients of aqueous phenylalanine, tyrosine isomers, and aminobutyric acids at infinitesimal concentration and temperatures from (293.2 to 333.2) K

    Tatsuya Umecky, Kozue Ehara, Shigeyoshi Omori, Tomoyuki Kuga, Kazuko Yui, Toshitaka Funazukuri

    Journal of Chemical and Engineering Data   58 ( 7 )   1909 - 1917   2013.7

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    Mutual diffusion coefficients at infinitesimal concentration and atmospheric pressure were measured for binary aqueous solutions of four α-amino acids (2-amino-3-phenylpropanoic acid (phenylalanine), 2-amino-3-(4-hydroxyphenyl)-propanoic acid (p-tyrosine), 2-amino-3-(3- hydroxyphenyl)-propanoic acid (m-tyrosine), and 2-amino-3-(2-hydroxyphenyl)- propanoic acid (o-tyrosine)) at temperatures from (298.3 to 313.2) K and five aminobutyric acid isomers (2-aminobutanoic acid (α-aminobutyric acid), 2-amino-2-methylpropanoic acid (α-aminoisobutyric acid), 3-aminobutanoic acid (β-aminobutyric acid), 3-amino-2-methylpropanoic acid (β-aminoisobutyric acid), and 4-aminobutanoic acid (γ-aminobutyric acid)) at temperatures from (293.2 to 333.2) K. The diffusion coefficients for each of the amino acids were well-represented by a simple correlation as a function of temperature and solvent viscosity with two adjustable parameters determined for each solute. The two parameters determined for each amino acid in our present and previous studies were closely related to the molar volume of the amino acids at its normal boiling point. We proposed predictive correlations for the diffusion coefficients of aqueous amino acid solutions at infinitesimal concentrations and tested the accuracy of the predictions with the reference data for aqueous amino acids at 298.2 K. © 2013 American Chemical Society.

    DOI: 10.1021/je3012698

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  • Binary diffusion coefficients of aqueous phenylalanine, tyrosine isomers, and aminobutyric acids at infinitesimal concentration and temperatures from (293.2 to 333.2) K

    Tatsuya Umecky, Kozue Ehara, Shigeyoshi Omori, Tomoyuki Kuga, Kazuko Yui, Toshitaka Funazukuri

    Journal of Chemical and Engineering Data   58 ( 7 )   1909 - 1917   2013.7

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    Mutual diffusion coefficients at infinitesimal concentration and atmospheric pressure were measured for binary aqueous solutions of four α-amino acids (2-amino-3-phenylpropanoic acid (phenylalanine), 2-amino-3-(4-hydroxyphenyl)-propanoic acid (p-tyrosine), 2-amino-3-(3- hydroxyphenyl)-propanoic acid (m-tyrosine), and 2-amino-3-(2-hydroxyphenyl)- propanoic acid (o-tyrosine)) at temperatures from (298.3 to 313.2) K and five aminobutyric acid isomers (2-aminobutanoic acid (α-aminobutyric acid), 2-amino-2-methylpropanoic acid (α-aminoisobutyric acid), 3-aminobutanoic acid (β-aminobutyric acid), 3-amino-2-methylpropanoic acid (β-aminoisobutyric acid), and 4-aminobutanoic acid (γ-aminobutyric acid)) at temperatures from (293.2 to 333.2) K. The diffusion coefficients for each of the amino acids were well-represented by a simple correlation as a function of temperature and solvent viscosity with two adjustable parameters determined for each solute. The two parameters determined for each amino acid in our present and previous studies were closely related to the molar volume of the amino acids at its normal boiling point. We proposed predictive correlations for the diffusion coefficients of aqueous amino acid solutions at infinitesimal concentrations and tested the accuracy of the predictions with the reference data for aqueous amino acids at 298.2 K. © 2013 American Chemical Society.

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  • 超臨界流体を用いる化学装置の移動現象に係る物性および装置定数

    船造俊孝

    化学工学   77 ( 7 )   494 - 496   2013.7

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  • Transport properties and parameters in chemical reactors with supercritical fluids

    494 - 496   2013.7

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  • Diffusion coefficients of phenylbutazone in supercritical CO2 and in ethanol

    Chang Yi Kong, Kou Watanabe, Toshitaka Funazukuri

    JOURNAL OF CHROMATOGRAPHY A   1279   92 - 97   2013.3

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    The diffusion coefficients D-12 of phenylbutazone at infinite dilution in supercritical CO2 were measured by the chromatographic impulse response (CIR) method. The measurements were carried out over the temperature range from 308.2 to 343.2 K at pressures up to 40.0 MPa. In addition, the D-12 data of phenylbutazone at infinite dilution in ethanol were also measured by the Taylor dispersion method at 298.2-333.2 K and at atmospheric pressure. The D-12 value of phenylbutazone increased from 4.45 x 10(-10) m(2) s(-1) 298.2 K and 0.1 MPa in ethanol to about 1.43 x 10(-8) m(2) s(-1) at 343.2 K and 14.0 MPa in supercritical CO2. It was found that all diffusion data of phenylbutazone measured in this study in supercritical CO2 and in ethanol can be satisfactorily represented by the hydrodynamic equation over a wide range of fluid viscosity from supercritical state to liquid state with average absolute relative deviation of 5.4% for 112 data points. (C) 2013 Elsevier B.V. All rights reserved.

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  • Diffusion coefficients of phenylbutazone in supercritical CO2 and in ethanol

    Chang Yi Kong, Kou Watanabe, Toshitaka Funazukuri

    JOURNAL OF CHROMATOGRAPHY A   1279   92 - 97   2013.3

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    The diffusion coefficients D-12 of phenylbutazone at infinite dilution in supercritical CO2 were measured by the chromatographic impulse response (CIR) method. The measurements were carried out over the temperature range from 308.2 to 343.2 K at pressures up to 40.0 MPa. In addition, the D-12 data of phenylbutazone at infinite dilution in ethanol were also measured by the Taylor dispersion method at 298.2-333.2 K and at atmospheric pressure. The D-12 value of phenylbutazone increased from 4.45 x 10(-10) m(2) s(-1) 298.2 K and 0.1 MPa in ethanol to about 1.43 x 10(-8) m(2) s(-1) at 343.2 K and 14.0 MPa in supercritical CO2. It was found that all diffusion data of phenylbutazone measured in this study in supercritical CO2 and in ethanol can be satisfactorily represented by the hydrodynamic equation over a wide range of fluid viscosity from supercritical state to liquid state with average absolute relative deviation of 5.4% for 112 data points. (C) 2013 Elsevier B.V. All rights reserved.

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  • Infinite dilution binary diffusion coefficients for compounds derived from biomass in water at 0.1 MPa and temperatures from (298.2 to 353.2) K

    Kazuko Yui, Naoto Yamazaki, Toshitaka Funazukuri

    Journal of Chemical and Engineering Data   58 ( 1 )   183 - 186   2013.1

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    Infinite dilution binary diffusion coefficients (D12) for compounds derived from biomass such as furan-2-carbaldehyde (furfural), 5-(hydroxymethyl)-2-furaldehyde (5-HMF), 2-methoxyphenol (guaiacol), 4-hydroxy-3-methoxybenzaldehyde (vanillin), and phenol in water were measured over the temperature range from (298.2 to 353.2) K at 0.1 MPa using the Taylor dispersion method. The relative expanded uncertainties with level of confidence 0.95 (the coverage factor, k = 2.78 for 4 degrees of freedom) for the measured diffusion coefficients were less than 5.8 % and typically ca. 2.4 %. The diffusion coefficients were correlated with the hydrodynamic equation, D 12/T = αηβ, with an average absolute relative deviation, AARD, less than 1.16 %. © 2012 American Chemical Society.

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  • Infinite Dilution Binary Diffusion Coefficients for Compounds Derived from Biomass in Water at 0.1 MPa and Temperatures from (298.2 to 353.2) K

    Kazuko Yui, Naoto Yamazaki, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   58 ( 1 )   183 - 186   2013.1

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    Infinite dilution binary diffusion coefficients (D-12) for compounds derived from biomass such as furan-2-carbaldehyde (furfural), 5-(hydroxymethyl)-2-furaldehyde (5-HMF), 2-methoxyphenol (guaiacol), 4-hydroxy-3-methoxybenzaldehyde (vanillin), and phenol in water were measured over the temperature range from (298.2 to 353.2) K at 0.1 MPa using the Taylor dispersion method. The relative expanded uncertainties with level of confidence 0.95 (the coverage factor, k = 2.78 for 4 degrees of freedom) for the measured diffusion coefficients were less than 5.8 % and typically ca. 2.4 %. The diffusion coefficients were correlated with the hydrodynamic equation, D-12/T = alpha eta(beta), with an average absolute relative deviation, AARD, less than 1.16 %.

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  • Infinite Dilution Binary Diffusion Coefficients for Compounds Derived from Biomass in Water at 0.1 MPa and Temperatures from (298.2 to 353.2) K

    Kazuko Yui, Naoto Yamazaki, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   58 ( 1 )   183 - 186   2013.1

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    Infinite dilution binary diffusion coefficients (D-12) for compounds derived from biomass such as furan-2-carbaldehyde (furfural), 5-(hydroxymethyl)-2-furaldehyde (5-HMF), 2-methoxyphenol (guaiacol), 4-hydroxy-3-methoxybenzaldehyde (vanillin), and phenol in water were measured over the temperature range from (298.2 to 353.2) K at 0.1 MPa using the Taylor dispersion method. The relative expanded uncertainties with level of confidence 0.95 (the coverage factor, k = 2.78 for 4 degrees of freedom) for the measured diffusion coefficients were less than 5.8 % and typically ca. 2.4 %. The diffusion coefficients were correlated with the hydrodynamic equation, D-12/T = alpha eta(beta), with an average absolute relative deviation, AARD, less than 1.16 %.

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  • Infinite Dilution Binary Diffusion Coefficients for Compounds Derived from Biomass in Water at 0.1 MPa and Temperatures from (298.2 to 353.2) K

    Kazuko Yui, Naoto Yamazaki, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   58 ( 1 )   183 - 186   2013.1

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    Infinite dilution binary diffusion coefficients (D-12) for compounds derived from biomass such as furan-2-carbaldehyde (furfural), 5-(hydroxymethyl)-2-furaldehyde (5-HMF), 2-methoxyphenol (guaiacol), 4-hydroxy-3-methoxybenzaldehyde (vanillin), and phenol in water were measured over the temperature range from (298.2 to 353.2) K at 0.1 MPa using the Taylor dispersion method. The relative expanded uncertainties with level of confidence 0.95 (the coverage factor, k = 2.78 for 4 degrees of freedom) for the measured diffusion coefficients were less than 5.8 % and typically ca. 2.4 %. The diffusion coefficients were correlated with the hydrodynamic equation, D-12/T = alpha eta(beta), with an average absolute relative deviation, AARD, less than 1.16 %.

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  • Reaction temperature variations on the crystallographic state of spinel cobalt aluminate

    Minori Taguchi, Takayuki Nakane, Kenjiro Hashi, Shinobu Ohki, Tadashi Shimizu, Yoshio Sakka, Akiyuki Matsushita, Hiroya Abe, Toshitaka Funazukuri, Takashi Naka

    DALTON TRANSACTIONS   42 ( 19 )   7167 - 7176   2013

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    In this study, we report a rapid and simple technique for obtaining cobalt aluminate having a spinel structure. The products were prepared from a hydroxide precursor synthesized by coprecipitation of cobalt (Co2+) and aluminum (Al3+) nitrates with an alkaline solution. The chosen precursor enabled low temperature fabrication of cobalt aluminate with a spinel structure by sintering it for 2 hours at low temperatures (>400 degrees C). Crystallographic and thermal analyses suggest that the low-temperature-sintered products contain Co3+ ions stabilized by chemisorbed water and/or hydroxide groups, which was not observed for products sintered at temperatures higher than 1000 degrees C. The color of the products turned from clear blue (Thenard's blue) to dark green when sintering temperatures were below 1000 degrees C. Magnetic quantities, Curie constants, and Weiss temperatures show a strong dependence on the sintering temperature. These findings suggest that there are mixed valent states, i.e. Co2+ and Co3+, and unique cation distributions at the different crystallographic sites in the spinel structure, especially in the products sintered at lower temperatures.

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  • Reaction temperature variations on the crystallographic state of spinel cobalt aluminate

    Minori Taguchi, Takayuki Nakane, Kenjiro Hashi, Shinobu Ohki, Tadashi Shimizu, Yoshio Sakka, Akiyuki Matsushita, Hiroya Abe, Toshitaka Funazukuri, Takashi Naka

    DALTON TRANSACTIONS   42 ( 19 )   7167 - 7176   2013

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    In this study, we report a rapid and simple technique for obtaining cobalt aluminate having a spinel structure. The products were prepared from a hydroxide precursor synthesized by coprecipitation of cobalt (Co2+) and aluminum (Al3+) nitrates with an alkaline solution. The chosen precursor enabled low temperature fabrication of cobalt aluminate with a spinel structure by sintering it for 2 hours at low temperatures (>400 degrees C). Crystallographic and thermal analyses suggest that the low-temperature-sintered products contain Co3+ ions stabilized by chemisorbed water and/or hydroxide groups, which was not observed for products sintered at temperatures higher than 1000 degrees C. The color of the products turned from clear blue (Thenard's blue) to dark green when sintering temperatures were below 1000 degrees C. Magnetic quantities, Curie constants, and Weiss temperatures show a strong dependence on the sintering temperature. These findings suggest that there are mixed valent states, i.e. Co2+ and Co3+, and unique cation distributions at the different crystallographic sites in the spinel structure, especially in the products sintered at lower temperatures.

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  • Applications of the chromatographic impulse response method in supercritical fluid chromatography

    Chang Yi Kong, Toshitaka Funazukuri, Seiichiro Kagei, Guosheng Wang, Fushen Lu, Takeshi Sako

    JOURNAL OF CHROMATOGRAPHY A   1250   141 - 156   2012.8

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    The use of chromatographic impulse response (CIR) method with a coated open tubular capillary column has potential advantages in supercritical fluid chromatography. In this review, applications of the CIR method to measuring the thermodynamic properties such as diffusion coefficients, solubilities and partial molar volumes are presented. This survey gives the theoretical backgrounds for the CIR method with linear adsorption and nonlinear adsorption models. Furthermore, the brief theoretical backgrounds for using retention factors to determine solubilities and partial molar volumes are also provided. In addition, the data sources for the diffusion coefficients with an emphasis on the results published after 2004 and for the partial molar volumes in supercritical carbon dioxide are presented. (C) 2012 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.chroma.2012.04.033

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  • Applications of the chromatographic impulse response method in supercritical fluid chromatography

    Chang Yi Kong, Toshitaka Funazukuri, Seiichiro Kagei, Guosheng Wang, Fushen Lu, Takeshi Sako

    JOURNAL OF CHROMATOGRAPHY A   1250   141 - 156   2012.8

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    Language:English   Publishing type:Book review, literature introduction, etc.   Publisher:ELSEVIER SCIENCE BV  

    The use of chromatographic impulse response (CIR) method with a coated open tubular capillary column has potential advantages in supercritical fluid chromatography. In this review, applications of the CIR method to measuring the thermodynamic properties such as diffusion coefficients, solubilities and partial molar volumes are presented. This survey gives the theoretical backgrounds for the CIR method with linear adsorption and nonlinear adsorption models. Furthermore, the brief theoretical backgrounds for using retention factors to determine solubilities and partial molar volumes are also provided. In addition, the data sources for the diffusion coefficients with an emphasis on the results published after 2004 and for the partial molar volumes in supercritical carbon dioxide are presented. (C) 2012 Elsevier B.V. All rights reserved.

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  • Recovery of Terephthalic Acid and Ethylene Glycol from Poly(ethylene terephthalate) under Hydrothermal Conditions of Aqueous Trimethylamine Solution

    Natsumi Wakabayashi, Tomoharu Kojima, Toshitaka Funazukuri

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   51 ( 16 )   5699 - 5704   2012.4

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    Poly(ethylene terephthalate) pellets were subjected to various amine solutions under hydrothermal conditions in a semibatch reactor. Methylamine, ethylamine, dirnethylamine, trimethylamine, ammonia, and sodium hydroxide were examined at 473 K and 10 MPa at concentrations of 0.6 mol/kg. The effects of the amine species on reaction rates and monomer yields were compared. For all solvents examined in the present study, the reactions were expressed by a surface reaction model, i.e., the 2/3rd-order reaction kinetics with respect to unreacted polymer mass. The reaction rates with the four amines were not very different and were similar to that with NaOH at the same concentration; but, they were faster than the rate with ammonia. When the reaction was conducted with trimethylamine, the yields of monomers and total yields of terephthalic acid and ethylene glycol were very close to the theoretical values. However, those with dimethylamine, ethylamine, and methylamine were slightly lower with intermediate products found in the product solutions.

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  • Recovery of Terephthalic Acid and Ethylene Glycol from Poly(ethylene terephthalate) under Hydrothermal Conditions of Aqueous Trimethylamine Solution

    Natsumi Wakabayashi, Tomoharu Kojima, Toshitaka Funazukuri

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   51 ( 16 )   5699 - 5704   2012.4

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    Poly(ethylene terephthalate) pellets were subjected to various amine solutions under hydrothermal conditions in a semibatch reactor. Methylamine, ethylamine, dirnethylamine, trimethylamine, ammonia, and sodium hydroxide were examined at 473 K and 10 MPa at concentrations of 0.6 mol/kg. The effects of the amine species on reaction rates and monomer yields were compared. For all solvents examined in the present study, the reactions were expressed by a surface reaction model, i.e., the 2/3rd-order reaction kinetics with respect to unreacted polymer mass. The reaction rates with the four amines were not very different and were similar to that with NaOH at the same concentration; but, they were faster than the rate with ammonia. When the reaction was conducted with trimethylamine, the yields of monomers and total yields of terephthalic acid and ethylene glycol were very close to the theoretical values. However, those with dimethylamine, ethylamine, and methylamine were slightly lower with intermediate products found in the product solutions.

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  • Hydrothermal saccharification of cotton cellulose in dilute aqueous formic acid solution

    Yuki Asaoka, Toshitaka Funazukuri

    RESEARCH ON CHEMICAL INTERMEDIATES   37 ( 2-5 )   233 - 242   2011.4

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    Cotton cellulose subjected to a dilute aqueous formic acid solution, at acid concentrations up to 1% (w/w), under hydrothermal conditions in a semi-batch reactor was converted into glucose and oligomers with lower degrees of polymerizations (DP). After heating at 250 degrees C for 60 min in 0.1% (w/w) aqueous formic acid solution, yields of glucose and total sugar with DP = 1 to 9 were 36.6 and 83.8% (100 x gC/gC of initial cotton sample), respectively, and 5-hydroxymethylfurfural was almost as low as 1%. The yields of glucose and oligomers were significantly improved by adding the acid. The reaction was represented by first-order reaction kinetics with regard to (1 - x) where x is the conversion based on the total sugar or glucose yield. At 250 degrees C, the differences in the rate constants (k - k(water)) were proportional to the square root of formic acid concentration.

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  • Hydrothermal saccharification of cotton cellulose in dilute aqueous formic acid solution

    Yuki Asaoka, Toshitaka Funazukuri

    RESEARCH ON CHEMICAL INTERMEDIATES   37 ( 2-5 )   233 - 242   2011.4

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    Cotton cellulose subjected to a dilute aqueous formic acid solution, at acid concentrations up to 1% (w/w), under hydrothermal conditions in a semi-batch reactor was converted into glucose and oligomers with lower degrees of polymerizations (DP). After heating at 250 degrees C for 60 min in 0.1% (w/w) aqueous formic acid solution, yields of glucose and total sugar with DP = 1 to 9 were 36.6 and 83.8% (100 x gC/gC of initial cotton sample), respectively, and 5-hydroxymethylfurfural was almost as low as 1%. The yields of glucose and oligomers were significantly improved by adding the acid. The reaction was represented by first-order reaction kinetics with regard to (1 - x) where x is the conversion based on the total sugar or glucose yield. At 250 degrees C, the differences in the rate constants (k - k(water)) were proportional to the square root of formic acid concentration.

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  • Solubility determination of organometallic complexes in supercritical carbon dioxide by chromatographic impulse response method

    Chang Yi Kong, Kenji Sone, Takeshi Sako, Toshitaka Funazukuri, Seiichiro Kagei

    FLUID PHASE EQUILIBRIA   302 ( 1-2 )   347 - 353   2011.3

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    The solubilities of organometallic complexes in supercritical CO(2) were determined from retention factors measured by the chromatographic impulse response (CIR) method, in which a solute was pulse-injected into a supercritical CO(2) flowing in a polymer coated open capillary column, and the response curve, i.e. time change of solute concentration, was monitored at the exit of the column. The retention factor and binary diffusion coefficient were simultaneously obtained as two parameters so that the fitting error between response curves of solute species measured and calculated was minimized. The validities of the method and the apparatus employed in this study were verified by determining the solubilities of naphthalene, which have extensively been reported in the literature. Then, the solubilities of organometallic complexes such as ferrocene and cobalt (III) acetylacetonate in supercritical CO(2) were determined. The data determined in this study were in good agreement with the literature data. The solubilities were also correlated with the Chrastil equation including the three adjustable parameters. (C) 2010 Elsevier B.V. All rights reserved.

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  • Solubility determination of organometallic complexes in supercritical carbon dioxide by chromatographic impulse response method

    Chang Yi Kong, Kenji Sone, Takeshi Sako, Toshitaka Funazukuri, Seiichiro Kagei

    FLUID PHASE EQUILIBRIA   302 ( 1-2 )   347 - 353   2011.3

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    The solubilities of organometallic complexes in supercritical CO(2) were determined from retention factors measured by the chromatographic impulse response (CIR) method, in which a solute was pulse-injected into a supercritical CO(2) flowing in a polymer coated open capillary column, and the response curve, i.e. time change of solute concentration, was monitored at the exit of the column. The retention factor and binary diffusion coefficient were simultaneously obtained as two parameters so that the fitting error between response curves of solute species measured and calculated was minimized. The validities of the method and the apparatus employed in this study were verified by determining the solubilities of naphthalene, which have extensively been reported in the literature. Then, the solubilities of organometallic complexes such as ferrocene and cobalt (III) acetylacetonate in supercritical CO(2) were determined. The data determined in this study were in good agreement with the literature data. The solubilities were also correlated with the Chrastil equation including the three adjustable parameters. (C) 2010 Elsevier B.V. All rights reserved.

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  • Measurements of binary diffusion coefficients for metal complexes in organic solvents by the Taylor dispersion method

    Minoru Toriurni, Ryohei Katooka, Kazuko Yui, Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    FLUID PHASE EQUILIBRIA   297 ( 1 )   62 - 66   2010.10

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    Infinite dilution binary diffusion coefficients, D(12), of ferrocene, 1,1'-dimethylferrocene and ethylferrocene in hexane, cyclohexane and ethanol at 313.2 K and pressures from 0.2 to 19 MPa, in acetonitrile at 298.2-333.2 K and 0.2 MPa, and various metallic acetylacetonate, acac, complexes such as Co(acac)(3), Ru(acac)(3), Rh(acac)(3), Pd(acac)(2) and Pt(acac)(2) mainly in ethanol at 313.2 K and 0.2 MPa were measured by the Taylor dispersion method. The D(12) values in m(2)s(-1) for the three ferrocenes in the present study and those of ferrocene and 1,1'-dimethylferrocene in supercritical carbon dioxide in our previous studies were represented by the modified hydrodynamic equation over a wide range of viscosity: M(0.5)D(12)/T = 1.435 x 10(-13)eta(-0.8446) with average absolute relative deviation of 2.40% for 316 data points, where M is the solute molecular weight. T is the temperature in K. eta is the solvent viscosity in Pa s. Although the D(12) values for the acac complexes were roughly represented by the above hydrodynamic equation, the accuracies were lower because they were dependent on not solute molecular weight but the number of acac ligand in the complex molecules. (C) 2010 Elsevier B.V. All rights reserved.

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  • Molecular dynamics simulation on ion-pair association of NaCl from ambient to supercritical water

    Kazuko Yui, Masaki Sakuma, Toshitaka Funazukuri

    FLUID PHASE EQUILIBRIA   297 ( 2 )   227 - 235   2010.10

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    Molecular dynamics (MD) simulations for aqueous NaCl solution were performed from ambient to supercritical conditions (25 degrees C, 1.0 g cm(-3): 250-350 degrees C, 0.67-0.8 g cm(-3); 380 degrees C, 0.2-0.8 g cm(-3): and 400-600 degrees C, 0.4 and 0.7 g cm(-3)) in the canonical ensemble to examine how the hydration structure relates with the thermodynamics of the ion-pair association. Hydration structure and the potential of mean force (PMF) of Na(+)Cl(-) ion-pair were calculated. ion-pair association constants were also calculated from the PMFs. Energies and entropies of the ion-pair at arbitrary inter-ionic distances from 2.0 to 8.0 angstrom were evaluated from the temperature derivative of the PMFs. From the calculation of energies and entropies, Na(+)-Cl(-) pair association was found to be endothermic and promoted by the entropy gain. PMFs had minimums and a slight maximum corresponding to CIP, SShIP, and the transition state between CIP and SShIP, and similar minimums and maximum were only observed for the energy term and not clearly observed for the entropy term. This result indicates that the shape of the PMF and stability of SShIP are determined by the energy of the system. Relationship between the hydration structure and the energy of the system was examined and it was confirmed that the hydration structure in the first hydration shell of the ion-pair was one of the important factor, which made the minimums and maximum in the energy terms and PMFs, and stabilized the SShIP structure. (C) 2010 Elsevier B.V. All rights reserved.

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  • Molecular dynamics simulation on ion-pair association of NaCl from ambient to supercritical water

    Kazuko Yui, Masaki Sakuma, Toshitaka Funazukuri

    FLUID PHASE EQUILIBRIA   297 ( 2 )   227 - 235   2010.10

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    Molecular dynamics (MD) simulations for aqueous NaCl solution were performed from ambient to supercritical conditions (25 degrees C, 1.0 g cm(-3): 250-350 degrees C, 0.67-0.8 g cm(-3); 380 degrees C, 0.2-0.8 g cm(-3): and 400-600 degrees C, 0.4 and 0.7 g cm(-3)) in the canonical ensemble to examine how the hydration structure relates with the thermodynamics of the ion-pair association. Hydration structure and the potential of mean force (PMF) of Na(+)Cl(-) ion-pair were calculated. ion-pair association constants were also calculated from the PMFs. Energies and entropies of the ion-pair at arbitrary inter-ionic distances from 2.0 to 8.0 angstrom were evaluated from the temperature derivative of the PMFs. From the calculation of energies and entropies, Na(+)-Cl(-) pair association was found to be endothermic and promoted by the entropy gain. PMFs had minimums and a slight maximum corresponding to CIP, SShIP, and the transition state between CIP and SShIP, and similar minimums and maximum were only observed for the energy term and not clearly observed for the entropy term. This result indicates that the shape of the PMF and stability of SShIP are determined by the energy of the system. Relationship between the hydration structure and the energy of the system was examined and it was confirmed that the hydration structure in the first hydration shell of the ion-pair was one of the important factor, which made the minimums and maximum in the energy terms and PMFs, and stabilized the SShIP structure. (C) 2010 Elsevier B.V. All rights reserved.

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  • Diffusion coefficients of metal acetylacetonates in supercritical carbon dioxide

    Chang Yi Kong, Yuan Yuan Gu, Masato Nakamura, Toshitaka Funazukuri, Seiichiro Kagei

    FLUID PHASE EQUILIBRIA   297 ( 2 )   162 - 167   2010.10

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    Binary diffusion coefficients, D(12), of the metal acetylacetonates, palladium(II) acetylacetonate and cobalt(III)acetylacetonate, were measured from 308.2 to 343.2 K over the pressure range from 9 to 40 MPa at infinite dilution in supercritical carbon dioxide using the chromatographic impulse response method. The effects of pressure, temperature, density, and viscosity on D(12) values were examined. It was observed that the D(12) values of palladium(II)acetylacetonate and cobalt(III)acetylacetonate were larger than those of lipids with similar molecular weights, such as arachidonic acid and monoolein, respectively. Furthermore, the measured D(12) data of each metal acetylacetonate were well correlated by the hydrodynamic equation D(12)/T as a function of carbon dioxide viscosity. (C) 2010 Elsevier B.V. All rights reserved.

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  • Diffusion coefficients of metal acetylacetonates in supercritical carbon dioxide

    Chang Yi Kong, Yuan Yuan Gu, Masato Nakamura, Toshitaka Funazukuri, Seiichiro Kagei

    FLUID PHASE EQUILIBRIA   297 ( 2 )   162 - 167   2010.10

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    Binary diffusion coefficients, D(12), of the metal acetylacetonates, palladium(II) acetylacetonate and cobalt(III)acetylacetonate, were measured from 308.2 to 343.2 K over the pressure range from 9 to 40 MPa at infinite dilution in supercritical carbon dioxide using the chromatographic impulse response method. The effects of pressure, temperature, density, and viscosity on D(12) values were examined. It was observed that the D(12) values of palladium(II)acetylacetonate and cobalt(III)acetylacetonate were larger than those of lipids with similar molecular weights, such as arachidonic acid and monoolein, respectively. Furthermore, the measured D(12) data of each metal acetylacetonate were well correlated by the hydrodynamic equation D(12)/T as a function of carbon dioxide viscosity. (C) 2010 Elsevier B.V. All rights reserved.

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  • Measurements of binary diffusion coefficients for metal complexes in organic solvents by the Taylor dispersion method

    Minoru Toriurni, Ryohei Katooka, Kazuko Yui, Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    FLUID PHASE EQUILIBRIA   297 ( 1 )   62 - 66   2010.10

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    Infinite dilution binary diffusion coefficients, D(12), of ferrocene, 1,1'-dimethylferrocene and ethylferrocene in hexane, cyclohexane and ethanol at 313.2 K and pressures from 0.2 to 19 MPa, in acetonitrile at 298.2-333.2 K and 0.2 MPa, and various metallic acetylacetonate, acac, complexes such as Co(acac)(3), Ru(acac)(3), Rh(acac)(3), Pd(acac)(2) and Pt(acac)(2) mainly in ethanol at 313.2 K and 0.2 MPa were measured by the Taylor dispersion method. The D(12) values in m(2)s(-1) for the three ferrocenes in the present study and those of ferrocene and 1,1'-dimethylferrocene in supercritical carbon dioxide in our previous studies were represented by the modified hydrodynamic equation over a wide range of viscosity: M(0.5)D(12)/T = 1.435 x 10(-13)eta(-0.8446) with average absolute relative deviation of 2.40% for 316 data points, where M is the solute molecular weight. T is the temperature in K. eta is the solvent viscosity in Pa s. Although the D(12) values for the acac complexes were roughly represented by the above hydrodynamic equation, the accuracies were lower because they were dependent on not solute molecular weight but the number of acac ligand in the complex molecules. (C) 2010 Elsevier B.V. All rights reserved.

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  • Measurements of Binary Diffusion Coefficients for Ferrocene and 1,1 '-Dimethylferrocene in Supercritical Carbon Dioxide

    Chang Yi Kong, Masato Nakamura, Kenji Sone, Toshitaka Funazukuri, Seiichiro Kagei

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   55 ( 9 )   3095 - 3100   2010.9

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    Binary diffusion coefficients D(12) and retention factors k of ferrocene and 1,1'-dimethylferrocene at infinite dilution in supercritical (sc) carbon dioxide were measured by the chromatographic impulse response (CIR) method at temperatures from (308.2 to 323.2) K over a pressure range from (8.0 to 40.3) MPa for ferrocene and from (8.2 to 40.1) MPa for 1, 1'-dimethylferrocene. The D(12) data for ferrocene were also measured by the Taylor dispersion method with two injection procedures of ferrocene: ferrocene dissolved both in sc CO(2) and in liquid hexane. The D(12) values of ferrocene were not affected by the injection methods and agreed with those measured by the CIR method. As has been seen for various organic compounds measured in our previous reports, the D(12) data for both metal complexes were correlated with the hydrodynamic equation D(12)/T = alpha eta(beta), where eta is the CO(2) viscosity and alpha and beta are the constants determined by each solute. The retention factors were also correlated with CO(2) density.

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  • Measurements of Binary Diffusion Coefficients for Ferrocene and 1,1 '-Dimethylferrocene in Supercritical Carbon Dioxide

    Chang Yi Kong, Masato Nakamura, Kenji Sone, Toshitaka Funazukuri, Seiichiro Kagei

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   55 ( 9 )   3095 - 3100   2010.9

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    Binary diffusion coefficients D(12) and retention factors k of ferrocene and 1,1'-dimethylferrocene at infinite dilution in supercritical (sc) carbon dioxide were measured by the chromatographic impulse response (CIR) method at temperatures from (308.2 to 323.2) K over a pressure range from (8.0 to 40.3) MPa for ferrocene and from (8.2 to 40.1) MPa for 1, 1'-dimethylferrocene. The D(12) data for ferrocene were also measured by the Taylor dispersion method with two injection procedures of ferrocene: ferrocene dissolved both in sc CO(2) and in liquid hexane. The D(12) values of ferrocene were not affected by the injection methods and agreed with those measured by the CIR method. As has been seen for various organic compounds measured in our previous reports, the D(12) data for both metal complexes were correlated with the hydrodynamic equation D(12)/T = alpha eta(beta), where eta is the CO(2) viscosity and alpha and beta are the constants determined by each solute. The retention factors were also correlated with CO(2) density.

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  • Recovery of L-Lactic Acid from Poly(L-lactic acid) under Hydrothermal Conditions of Dilute Aqueous Sodium Hydroxide Solution

    Masaru Yagihashi, Toshitaka Funazukuri

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   49 ( 3 )   1247 - 1251   2010.2

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    Poly(L-lactic acid) (PLLA) pellets were degraded in a batch reactor under hydrothermal conditions of aqueous sodium hydroxide Solution, from 343 to 453 K, compared to water in the absence of NaOH. Over ail entire range of conversion, Components solubilized from PLLA mainly consisted Or L-lactic acid (LLA) in the presence of NaOH. For instance, PLLA was nearly completely converted into LLA at 433 K for 60 min or 453 K for 20 min with 0.6 M aqueous NaOH solution, where D-lactic acid was not observed. The degradation reaction with/without NaOH proceeded in the induction stage followed by the major degradation stage, as has been seen for polyesters reported in our previous Studies. In the major degradation stage the overall reaction rate for PLLA was represented by 2/3-order reaction kinetics with respect to the amount of unreacted polymer, suggesting that the reaction occurred on the polymer Surface. The NaOH concentrations above 0.6 M at 343 K hardly affected the reaction rates, but did affect the induction time remarkably. It can be considered that the degradation reaction is controlled by not chemical reaction but dissolution of products on the pellet surface.

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  • Recovery of L-Lactic Acid from Poly(L-lactic acid) under Hydrothermal Conditions of Dilute Aqueous Sodium Hydroxide Solution

    Masaru Yagihashi, Toshitaka Funazukuri

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   49 ( 3 )   1247 - 1251   2010.2

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    Poly(L-lactic acid) (PLLA) pellets were degraded in a batch reactor under hydrothermal conditions of aqueous sodium hydroxide Solution, from 343 to 453 K, compared to water in the absence of NaOH. Over ail entire range of conversion, Components solubilized from PLLA mainly consisted Or L-lactic acid (LLA) in the presence of NaOH. For instance, PLLA was nearly completely converted into LLA at 433 K for 60 min or 453 K for 20 min with 0.6 M aqueous NaOH solution, where D-lactic acid was not observed. The degradation reaction with/without NaOH proceeded in the induction stage followed by the major degradation stage, as has been seen for polyesters reported in our previous Studies. In the major degradation stage the overall reaction rate for PLLA was represented by 2/3-order reaction kinetics with respect to the amount of unreacted polymer, suggesting that the reaction occurred on the polymer Surface. The NaOH concentrations above 0.6 M at 343 K hardly affected the reaction rates, but did affect the induction time remarkably. It can be considered that the degradation reaction is controlled by not chemical reaction but dissolution of products on the pellet surface.

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  • Reaction kinetics of hydrothermal depolymerization of poly(ethylene naphthalate), poly(ethylene terephthalate), and polycarbonate with aqueous ammonia solution

    Risa Arai, Kentaro Zenda, Kohei Hatakeyama, Kazuko Yui, Toshitaka Funazukuri

    CHEMICAL ENGINEERING SCIENCE   65 ( 1 )   36 - 41   2010.1

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    Poly(ethylene naphthalate) (PEN), poly(ethylene terephthalate) (PET) and poly(carbonate) (PC) were depolymerized in a semi-batch reactor with a 0.6 M aqueous ammonia solution under hydrothermal conditions, at 433-553 K and 10 MPa, compared with aqueous alkaline (NaOH and KOH) solutions and water alone. The polymers studied were almost completely converted into monomers in an aqueous ammonia solution as well as aqueous NaOH and KOH solutions under hydrothermal conditions. The depolymerization reactions for the three polymers consisted of the initial induction stage, where the reactions proceeded very slowly, and the major depolymerization stage thereafter. The induction times were correlated with temperature. In the latter stage the overall depolymerization rate for each polymer was represented by 2/3-order reaction kinetics with respect to the amount of unreacted polymer, suggesting that the reaction occurred on the polymer surface. The depolymerization rates for PC with a 0.6 M aqueous ammonia solution were much faster than those with a 0.6 M aqueous NaOH solution. (C) 2009 Elsevier Ltd. All rights reserved.

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  • Reaction kinetics of hydrothermal depolymerization of poly(ethylene naphthalate), poly(ethylene terephthalate), and polycarbonate with aqueous ammonia solution

    Risa Arai, Kentaro Zenda, Kohei Hatakeyama, Kazuko Yui, Toshitaka Funazukuri

    CHEMICAL ENGINEERING SCIENCE   65 ( 1 )   36 - 41   2010.1

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    Poly(ethylene naphthalate) (PEN), poly(ethylene terephthalate) (PET) and poly(carbonate) (PC) were depolymerized in a semi-batch reactor with a 0.6 M aqueous ammonia solution under hydrothermal conditions, at 433-553 K and 10 MPa, compared with aqueous alkaline (NaOH and KOH) solutions and water alone. The polymers studied were almost completely converted into monomers in an aqueous ammonia solution as well as aqueous NaOH and KOH solutions under hydrothermal conditions. The depolymerization reactions for the three polymers consisted of the initial induction stage, where the reactions proceeded very slowly, and the major depolymerization stage thereafter. The induction times were correlated with temperature. In the latter stage the overall depolymerization rate for each polymer was represented by 2/3-order reaction kinetics with respect to the amount of unreacted polymer, suggesting that the reaction occurred on the polymer surface. The depolymerization rates for PC with a 0.6 M aqueous ammonia solution were much faster than those with a 0.6 M aqueous NaOH solution. (C) 2009 Elsevier Ltd. All rights reserved.

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  • Hydrothermal Degradation of Steam-Exploded Corn

    Chisato Kimura, Yoshimi Imai, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN   43 ( 3 )   296 - 299   2010

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    Corn grains are pulverized by steam explosion after 40 min cooking at 533 K, and the products are further hydrolyzed under hydrothermal conditions. Residual solids consisting of particles having average diameter of 89 mu m are obtained by steam explosion, and about 50-60 wt%(C/C) on carbon weight basis of initial sample is converted into water soluble (WS) components. The steam exploded products are further hydrothermally degraded in a small batch reactor at 453 to 493 K. The yields of WS components are almost unchanged with time at 453 and 473 K, but the molecular weights significantly decrease to lower than 1000.

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  • Hydrothermal Degradation of Steam-Exploded Corn

    Chisato Kimura, Yoshimi Imai, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN   43 ( 3 )   296 - 299   2010

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    Corn grains are pulverized by steam explosion after 40 min cooking at 533 K, and the products are further hydrolyzed under hydrothermal conditions. Residual solids consisting of particles having average diameter of 89 mu m are obtained by steam explosion, and about 50-60 wt%(C/C) on carbon weight basis of initial sample is converted into water soluble (WS) components. The steam exploded products are further hydrothermally degraded in a small batch reactor at 453 to 493 K. The yields of WS components are almost unchanged with time at 453 and 473 K, but the molecular weights significantly decrease to lower than 1000.

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  • 超臨界クロマトグラフィーを用いた極性溶質の相互拡散係数の測定 ―Langmuir吸着等温式を用いた解析―

    船造俊孝, 孔昌一, 影井清一郎

    JASCOレポート   5 - 8   2008.12

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  • Measurements of binary diffusion coefficients for polar compounds in supercritical fluids by chromatographic technique with Langmuir adsorption isotherm Reviewed

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    JASCO reports   50   5 - 8   2008.12

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  • Predictive correlation of binary diffusion and self-diffusion coefficients under supercritical and liquid conditions

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    Journal of Supercritical Fluids   46 ( 3 )   280 - 284   2008.10

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    The hydrodynamic equation D/T = αηβ, where D is the infinite dilution binary diffusion or self-diffusion coefficient, T is the temperature, η is the fluid viscosity, and α and β are constants, were demonstrated to be effective for predicting both binary diffusion and self-diffusion coefficients in high density fluids, i.e. liquid and supercritical states. When a solute was specified, the correlation well represented both binary diffusion and self-diffusion coefficients, irrespective of solvent over a wide solvent viscosity range. The solute-dependent constants α and β were determined for 12 solutes with average absolute deviation of 6.2% for 1006 data points. © 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.supflu.2008.03.004

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  • Depolymerization of poly(ethylene terephthalate) in dilute aqueous ammonia solution under hydrothermal conditions

    Kentaro Zenda, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY   83 ( 10 )   1381 - 1386   2008.10

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    BACKGROUND: Various methods, such as glycolysis, methanolysis, and hydrolysis with supercritical water, have been investigated for chemical recycling of poly(ethylene terephthalate) (PET), which is used in large quantities for beverage containers. However, a more effective process is needed. RESULTS: PET was depolymerized in aqueous ammonia in a batch reactor and a semi-batch reactor over a temperature range 463 to 5 73 K, at a pressure 10 MPa, and with up to 3 mol L-1 ammonia. Total organic carbon in the product solution and yields of the major products such as terephthalic acid (TPA) and ethylene glycol (EG) were measured. The PET pellet sample was thoroughly solubilized in aqueous ammonia under hydrothermal conditions, and more than 90% of the initial PET samples were recovered as TPA+EG on a carbon weight basis. Depolymerization rates were represented by 2/3-order reaction kinetics with respect to unreacted PET, where the reaction took place on the PET pellet surface. The rate increased slightly with increasing ammonia concentration. CONCLUSION: Ammonia was effective for depolymerization of PET, allowing the recovery of TPA and EG under hydrothermal conditions. (c) 2008 Society of Chemical Industry.

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  • Depolymerization of poly(ethylene terephthalate) in dilute aqueous ammonia solution under hydrothermal conditions

    Kentaro Zenda, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY   83 ( 10 )   1381 - 1386   2008.10

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    BACKGROUND: Various methods, such as glycolysis, methanolysis, and hydrolysis with supercritical water, have been investigated for chemical recycling of poly(ethylene terephthalate) (PET), which is used in large quantities for beverage containers. However, a more effective process is needed. RESULTS: PET was depolymerized in aqueous ammonia in a batch reactor and a semi-batch reactor over a temperature range 463 to 5 73 K, at a pressure 10 MPa, and with up to 3 mol L-1 ammonia. Total organic carbon in the product solution and yields of the major products such as terephthalic acid (TPA) and ethylene glycol (EG) were measured. The PET pellet sample was thoroughly solubilized in aqueous ammonia under hydrothermal conditions, and more than 90% of the initial PET samples were recovered as TPA+EG on a carbon weight basis. Depolymerization rates were represented by 2/3-order reaction kinetics with respect to unreacted PET, where the reaction took place on the PET pellet surface. The rate increased slightly with increasing ammonia concentration. CONCLUSION: Ammonia was effective for depolymerization of PET, allowing the recovery of TPA and EG under hydrothermal conditions. (c) 2008 Society of Chemical Industry.

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  • Predictive correlation of binary diffusion and self-diffusion coefficients under supercritical and liquid conditions

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    JOURNAL OF SUPERCRITICAL FLUIDS   46 ( 3 )   280 - 284   2008.10

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    The hydrodynamic equation D/T=alpha eta(beta), where D is the infinite dilution binary diffusion or self-diffusion coefficient, T is the temperature, eta is the fluid viscosity, and alpha and beta are constants, were demonstrated to be effective for predicting both binary diffusion and self-diffusion coefficients in high density fluids, i.e. liquid and supercritical states. When a solute was specified, the correlation well represented both binary diffusion and self-diffusion coefficients, irrespective of solvent over a wide solvent viscosity range. The solute-dependent constants alpha and beta were determined for 12 solutes with average absolute deviation of 6.2% for 1006 data points. (C) 2008 Elsevier B.V. All rights reserved.

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  • Hydrothermal degradation of polysaccharides in a semi-batch reactor: product distribution as a function of severity parameter

    Tetsuya Miyazawa, Shinnosuke Ohtsu, Toshitaka Funazukuri

    JOURNAL OF MATERIALS SCIENCE   43 ( 7 )   2447 - 2451   2008.4

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    The naturally occurring polysaccharides, starch and pectic acid, were hydrothermally degraded in a semi-batch reactor coupled with a plug-flow reactor (PFR) to produce valuable chemicals including mono- and oligosaccharides over a temperature range from 160 to 240 degrees C at 10 MPa. The solid polysaccharide samples were solubilized in a semi-batch reactor, and the water-soluble (WS) components instantly entered the PFR in which further degradation took place. The reaction temperature and/or residence time in the PFR significantly affected the yields of oligosaccharides, monosaccharides and secondary decomposition products, and also the average molecular weight of WS components. The product distributions were expressed with severity, which combines the effects of temperature and time on the progress of the reaction, as a single reaction parameter. Using this parameter, it was found that similar product distributions were obtained at equal levels of severity. The severity parameter enabled easy interpretation of the change in product distribution for these reactions.

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  • Hydrothermal dechlorination of PVC in the presence of ammonia

    Koichiro Hashimoto, Shyoji Suga, Yutaka Wakayama, Toshitaka Funazukuri

    JOURNAL OF MATERIALS SCIENCE   43 ( 7 )   2457 - 2462   2008.4

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    Poly(vinyl chloride) (PVC) powder and commercial rigid PVC pipe were dechlorinated hydrothermally in the presence of alkalis such as ammonia, sodium hydroxide, and potassium hydroxide in a semi-batch flow reactor, with comparison to dechlorination using water alone. Aqueous ammonia was the most effective among these solvents. Dechlorination with aqueous ammonia proceeded in three stages: initial incubation, major dechlorination, and slow dechlorination. In the initial stage the rates were very slow and scarcely affected by temperature or ammonia concentration. In the second stage extensive dechlorination took place, and the rates were affected by temperature and ammonia concentration. These higher rates were found to be significantly influenced by swelling, not alkalinity, when these various alkalis solvents were compared. In the last stage the rates were slower than in the previous stage, and were not significantly dependent on temperature or ammonia concentration.

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  • Hydrothermal dechlorination of PVC in the presence of ammonia

    Koichiro Hashimoto, Shyoji Suga, Yutaka Wakayama, Toshitaka Funazukuri

    JOURNAL OF MATERIALS SCIENCE   43 ( 7 )   2457 - 2462   2008.4

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    Poly(vinyl chloride) (PVC) powder and commercial rigid PVC pipe were dechlorinated hydrothermally in the presence of alkalis such as ammonia, sodium hydroxide, and potassium hydroxide in a semi-batch flow reactor, with comparison to dechlorination using water alone. Aqueous ammonia was the most effective among these solvents. Dechlorination with aqueous ammonia proceeded in three stages: initial incubation, major dechlorination, and slow dechlorination. In the initial stage the rates were very slow and scarcely affected by temperature or ammonia concentration. In the second stage extensive dechlorination took place, and the rates were affected by temperature and ammonia concentration. These higher rates were found to be significantly influenced by swelling, not alkalinity, when these various alkalis solvents were compared. In the last stage the rates were slower than in the previous stage, and were not significantly dependent on temperature or ammonia concentration.

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  • Reliability of binary diffusion coefficients determined from tailing response curves measured by the Taylor dispersion method in the near critical region

    Chang Yi Kong, Toshitaka Funazukuri, Seiichiro Kagei

    JOURNAL OF SUPERCRITICAL FLUIDS   44 ( 3 )   294 - 300   2008.4

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    Two kinds of tracer response measurements, by the Taylor dispersion method using a stainless-steel diffusion column and the chromatographic impulse response (CIR) method using a polymer-coated diffusion column, were carried out by using the curve fitting to determine infinite-dilution binary diffusion coefficients of vitamin K-3 (2-methylnaphthalene-1,4-dione), as a medium polar compound, in supercritical CO2 at 308.2 K and pressures from 7.75 to 31.00 MPa. The response curves in the Taylor dispersion method showed more significantly tailing closer to the critical point, whereas those did not at conditions away from the critical point. However, the CIR method provided the response curves almost without tailing over an entire range of pressure studied. Consequently, in the CIR method the response curves were accurately reproduced with the determined values of two parameters. binary diffusion coefficient and retention factor. The determined values of diffusion coefficients showed a little slow-down in the near critical region. In the Taylor dispersion method, however, the response curves with tailing were poorly reproduced with the determined values of diffusion coefficients, which apparently led to a steep-down in the near critical region. (C) 2007 Elsevier B.V. All rights reserved.

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  • Reliability of binary diffusion coefficients determined from tailing response curves measured by the Taylor dispersion method in the near critical region

    Chang Yi Kong, Toshitaka Funazukuri, Seiichiro Kagei

    Journal of Supercritical Fluids   44 ( 3 )   294 - 300   2008.4

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    Two kinds of tracer response measurements, by the Taylor dispersion method using a stainless-steel diffusion column and the chromatographic impulse response (CIR) method using a polymer-coated diffusion column, were carried out by using the curve fitting to determine infinite-dilution binary diffusion coefficients of vitamin K3 (2-methylnaphthalene-1,4-dione), as a medium polar compound, in supercritical CO2 at 308.2 K and pressures from 7.75 to 31.00 MPa. The response curves in the Taylor dispersion method showed more significantly tailing closer to the critical point, whereas those did not at conditions away from the critical point. However, the CIR method provided the response curves almost without tailing over an entire range of pressure studied. Consequently, in the CIR method the response curves were accurately reproduced with the determined values of two parameters, binary diffusion coefficient and retention factor. The determined values of diffusion coefficients showed a little slow-down in the near critical region. In the Taylor dispersion method, however, the response curves with tailing were poorly reproduced with the determined values of diffusion coefficients, which apparently led to a steep-down in the near critical region. © 2007 Elsevier B.V. All rights reserved.

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  • Decomposition of urea in sub- and supercritical water with/without additives

    Moriyuki Okazaki, Toshitaka Funazukuri

    JOURNAL OF MATERIALS SCIENCE   43 ( 7 )   2316 - 2322   2008.4

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    Urea was decomposed in sub- and supercritical water in the presence and the absence of hydrogen peroxide at temperatures from 538 to 651 K, 23 MPa and residence times up to 1.5 s in a continuous flow reactor. The initial concentrations of urea varied from 0.005 to 0.5 mol L(-1). The major products were carbon dioxide, and ammonia. As a minor product cyanic acid was detected without hydrogen peroxide, and nitric acid and nitrous acid were produced with hydrogen peroxide. The decomposition rates of urea with and without hydrogen peroxide were represented by the first order reaction kinetics. The addition of hydrogen peroxide increased the rates at lower temperatures, but was scarcely effective at higher temperatures. In the absence of hydrogen peroxide, the effects of various additives at concentrations of 0.5 mol L(-1) on the decomposition rates at 649 K were examined. The addition of NaOH enhanced them remarkably. The presence of NaCl did not affect the product distribution significantly, but enhanced the rates somewhat, in particular, increasing as approaching to the critical temperature of water. The addition of acids, hydrogen chloride and sulfuric acid, did not increase the rates.

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  • Decomposition of urea in sub- and supercritical water with/without additives

    Moriyuki Okazaki, Toshitaka Funazukuri

    JOURNAL OF MATERIALS SCIENCE   43 ( 7 )   2316 - 2322   2008.4

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    Urea was decomposed in sub- and supercritical water in the presence and the absence of hydrogen peroxide at temperatures from 538 to 651 K, 23 MPa and residence times up to 1.5 s in a continuous flow reactor. The initial concentrations of urea varied from 0.005 to 0.5 mol L(-1). The major products were carbon dioxide, and ammonia. As a minor product cyanic acid was detected without hydrogen peroxide, and nitric acid and nitrous acid were produced with hydrogen peroxide. The decomposition rates of urea with and without hydrogen peroxide were represented by the first order reaction kinetics. The addition of hydrogen peroxide increased the rates at lower temperatures, but was scarcely effective at higher temperatures. In the absence of hydrogen peroxide, the effects of various additives at concentrations of 0.5 mol L(-1) on the decomposition rates at 649 K were examined. The addition of NaOH enhanced them remarkably. The presence of NaCl did not affect the product distribution significantly, but enhanced the rates somewhat, in particular, increasing as approaching to the critical temperature of water. The addition of acids, hydrogen chloride and sulfuric acid, did not increase the rates.

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  • Hydrothermal degradation of polysaccharides in a semi-batch reactor: product distribution as a function of severity parameter

    Tetsuya Miyazawa, Shinnosuke Ohtsu, Toshitaka Funazukuri

    JOURNAL OF MATERIALS SCIENCE   43 ( 7 )   2447 - 2451   2008.4

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    The naturally occurring polysaccharides, starch and pectic acid, were hydrothermally degraded in a semi-batch reactor coupled with a plug-flow reactor (PFR) to produce valuable chemicals including mono- and oligosaccharides over a temperature range from 160 to 240 degrees C at 10 MPa. The solid polysaccharide samples were solubilized in a semi-batch reactor, and the water-soluble (WS) components instantly entered the PFR in which further degradation took place. The reaction temperature and/or residence time in the PFR significantly affected the yields of oligosaccharides, monosaccharides and secondary decomposition products, and also the average molecular weight of WS components. The product distributions were expressed with severity, which combines the effects of temperature and time on the progress of the reaction, as a single reaction parameter. Using this parameter, it was found that similar product distributions were obtained at equal levels of severity. The severity parameter enabled easy interpretation of the change in product distribution for these reactions.

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  • Effects of hydroxyl groups on binary diffusion coefficients of alpha-amino acids in dilute aqueous solutions

    Tatsuya Umecky, Shigeyoshi Omori, Tomoyuki Kuga, Toshitaka Funazukuri

    FLUID PHASE EQUILIBRIA   264 ( 1-2 )   18 - 22   2008.3

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    Binary diffusion coefficients, D-12, of alpha-amino acids with hydroxyl groups, e.g., serine, threonine, allothreonine and homoserine, in dilute aqueous solutions were measured at six different temperatures from 293.2 to 333.2 K by the Taylor dispersion method. The determined D-12 values of serine and threonine at 298.2 K were in good agreement with the published data, whereas no data for allothreonine and homoserine is available in the literature. The D-12 values for each amino acid were well represented with the Stokes-Einstein equation by adjusting the molecular diameter. The D-12 values for amino acids containing hydroxyl groups, except for homoserine, were lower by approximately 5%, on the basis of the same solute molar volume, than those from the corresponding amino acids without hydroxyl groups. (c) 2007 Elsevier B.V. All rights reserved.

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  • Effects of hydroxyl groups on binary diffusion coefficients of alpha-amino acids in dilute aqueous solutions

    Tatsuya Umecky, Shigeyoshi Omori, Tomoyuki Kuga, Toshitaka Funazukuri

    FLUID PHASE EQUILIBRIA   264 ( 1-2 )   18 - 22   2008.3

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    Binary diffusion coefficients, D-12, of alpha-amino acids with hydroxyl groups, e.g., serine, threonine, allothreonine and homoserine, in dilute aqueous solutions were measured at six different temperatures from 293.2 to 333.2 K by the Taylor dispersion method. The determined D-12 values of serine and threonine at 298.2 K were in good agreement with the published data, whereas no data for allothreonine and homoserine is available in the literature. The D-12 values for each amino acid were well represented with the Stokes-Einstein equation by adjusting the molecular diameter. The D-12 values for amino acids containing hydroxyl groups, except for homoserine, were lower by approximately 5%, on the basis of the same solute molar volume, than those from the corresponding amino acids without hydroxyl groups. (c) 2007 Elsevier B.V. All rights reserved.

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  • Measurements of binary diffusion coefficients and retention factors for dibenzo-24-crown-8 and 15-crown-5 in supercritical carbon dioxide by chromatographic impulse response technique

    Chang Yi Kong, Naoko Takahashi, Toshitaka Funazukuri, Seiichiro Kagei

    FLUID PHASE EQUILIBRIA   257 ( 2 )   223 - 227   2007.8

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    Binary diffusion coefficients D-12 and retention factors k for dibenzo-24-crown-8 and 15-crown-5 ethers at 308.18 and 313.20 K, and vitamin K-1 at 313.20 K were measured in supercritical carbon dioxide by the chromatographic impulse response technique, and the effects of molecular shapes on the D-12 values were studied. At 313.2 K and 11.0 MPa the D-12 value of 15-crown-5 was higher than that predicted from the D-12 correlation with molecular weight MW over the range from 32 of methanol to 1138 of trinervonin reported in our previous studies, while the D-12 value of dibenzo-24-crown-8. disk shape molecule with MW=448.5, was almost in agreement with that of vitamin K-1, long chain molecule with MW=450.7, and with those predicted from the correlation. (c) 2007 Elsevier B.V. All rights reserved.

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  • Measurement and correlation of liquid-liquid equilibria for acetonitrile plus n-alkane systems

    Takeshi Furuya, Tetsuya Ishikawa, Toshitaka Funazukuri, Yoshihiro Takebayashi, Satoshi Yoda, Katsuto Otake, Tohru Saito

    FLUID PHASE EQUILIBRIA   257 ( 2 )   147 - 150   2007.8

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    The reduction of sulfur content in gasoline and diesel fuel is a great environmental concern to reduce the motor vehicle emissions. Oxidative desulfurization using acetonitrile biphasic system has received much attention in recent years. The oxidative desulfurization can be oxidized the unreactive sulfur contents in the hydrodesulfurization and removed effectively. For the oxidative desulfurization process design and development, liquid-liquid equilibria (LLE) for acetonitrile biphasic systems are needed as fundamental information. In our previous work. LLE for acetonitrile+n-octane and+n-decane systems have been reported. In this work, therefore, LLE for acetonitrile+n-hexadecane system was measured. Furthermore, NRTL equation was applied to correlate the LLE for these three acetonitrile+n-alkane systems. (c) 2007 Elsevier B.V. All rights reserved.

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  • Measurement and correlation of liquid-liquid equilibria for acetonitrile plus n-alkane systems

    Takeshi Furuya, Tetsuya Ishikawa, Toshitaka Funazukuri, Yoshihiro Takebayashi, Satoshi Yoda, Katsuto Otake, Tohru Saito

    FLUID PHASE EQUILIBRIA   257 ( 2 )   147 - 150   2007.8

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    The reduction of sulfur content in gasoline and diesel fuel is a great environmental concern to reduce the motor vehicle emissions. Oxidative desulfurization using acetonitrile biphasic system has received much attention in recent years. The oxidative desulfurization can be oxidized the unreactive sulfur contents in the hydrodesulfurization and removed effectively. For the oxidative desulfurization process design and development, liquid-liquid equilibria (LLE) for acetonitrile biphasic systems are needed as fundamental information. In our previous work. LLE for acetonitrile+n-octane and+n-decane systems have been reported. In this work, therefore, LLE for acetonitrile+n-hexadecane system was measured. Furthermore, NRTL equation was applied to correlate the LLE for these three acetonitrile+n-alkane systems. (c) 2007 Elsevier B.V. All rights reserved.

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  • Measurements of binary diffusion coefficients and retention factors for dibenzo-24-crown-8 and 15-crown-5 in supercritical carbon dioxide by chromatographic impulse response technique

    Chang Yi Kong, Naoko Takahashi, Toshitaka Funazukuri, Seiichiro Kagei

    FLUID PHASE EQUILIBRIA   257 ( 2 )   223 - 227   2007.8

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    Binary diffusion coefficients D-12 and retention factors k for dibenzo-24-crown-8 and 15-crown-5 ethers at 308.18 and 313.20 K, and vitamin K-1 at 313.20 K were measured in supercritical carbon dioxide by the chromatographic impulse response technique, and the effects of molecular shapes on the D-12 values were studied. At 313.2 K and 11.0 MPa the D-12 value of 15-crown-5 was higher than that predicted from the D-12 correlation with molecular weight MW over the range from 32 of methanol to 1138 of trinervonin reported in our previous studies, while the D-12 value of dibenzo-24-crown-8. disk shape molecule with MW=448.5, was almost in agreement with that of vitamin K-1, long chain molecule with MW=450.7, and with those predicted from the correlation. (c) 2007 Elsevier B.V. All rights reserved.

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  • Simultaneous determination of binary diffusion coefficients from multiple response curves by chromatographic measurements

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    JOURNAL OF CHROMATOGRAPHY A   1150 ( 1-2 )   105 - 111   2007.5

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    The chromatographic impulse response technique with a polymer coated capillary column was applied to measurements of infinite dilution binary diffusion coefficients D and retention factors k in supercritical carbon dioxide by injecting a hexane solution dissolving a mixture of three unsaturated fatty acids such as alpha-linolenic acid, eicosapentaenoic acid, and docosahexaenoic acid. The coefficients were simultaneously estimated by the curve fitting analysis even from partially overlapping response curves with the resolution of 0.8. The D and k values for each solute were able to be so obtained as accurately as those determined by individually injecting a single component solution. Almost no effect of the interaction among the components in the mixture was found from various approaching ways for curve fitting and the consecutive injection of the mixture at a certain interval. (C) 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.chroma.2006.09.019

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  • Simultaneous determination of binary diffusion coefficients from multiple response curves by chromatographic measurements

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    JOURNAL OF CHROMATOGRAPHY A   1150 ( 1-2 )   105 - 111   2007.5

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    The chromatographic impulse response technique with a polymer coated capillary column was applied to measurements of infinite dilution binary diffusion coefficients D and retention factors k in supercritical carbon dioxide by injecting a hexane solution dissolving a mixture of three unsaturated fatty acids such as alpha-linolenic acid, eicosapentaenoic acid, and docosahexaenoic acid. The coefficients were simultaneously estimated by the curve fitting analysis even from partially overlapping response curves with the resolution of 0.8. The D and k values for each solute were able to be so obtained as accurately as those determined by individually injecting a single component solution. Almost no effect of the interaction among the components in the mixture was found from various approaching ways for curve fitting and the consecutive injection of the mixture at a certain interval. (C) 2006 Elsevier B.V. All rights reserved.

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  • Infinite dilution binary diffusion coefficients for six sugars at 0.1 MPa and temperatures from (273.2 to 353.2) K

    Noriko Mogi, Eiji Sugai, Yuichi Fuse, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   52 ( 1 )   40 - 43   2007.1

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    Infinite dilution binary diffusion coefficients D-12 for arabinose, xylose, glucose, mannose, galactose, and sucrose in water were measured over the temperature range from (273.2 to 353.2) K at 0.1 MPa with the Taylor dispersion method. The values of D-12/T were well correlated with water viscosity for each solute with average absolute deviation AAD < 1.7 %. The accuracies for various predictive correlations were also examined.

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  • Infinite dilution binary diffusion coefficients for six sugars at 0.1 MPa and temperatures from (273.2 to 353.2) K

    Noriko Mogi, Eiji Sugai, Yuichi Fuse, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   52 ( 1 )   40 - 43   2007.1

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    Infinite dilution binary diffusion coefficients D-12 for arabinose, xylose, glucose, mannose, galactose, and sucrose in water were measured over the temperature range from (273.2 to 353.2) K at 0.1 MPa with the Taylor dispersion method. The values of D-12/T were well correlated with water viscosity for each solute with average absolute deviation AAD < 1.7 %. The accuracies for various predictive correlations were also examined.

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  • Measurements of binary diffusion coefficients, retention factors and partial molar volumes for myristoleic acid and its methyl ester in supercritical carbon dioxide

    Chang Yi Kong, Masakazu Mori, Toshitaka Funazukuri, Seiichiro Kagei

    ANALYTICAL SCIENCES   22 ( 11 )   1431 - 1436   2006.11

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    The binary diffusion coefficients, D-12, and retention factors for myristoleic acid and its methyl ester at infinite dilution were measured by the chromatographic impulse response technique in supercritical carbon dioxide at temperatures of 313.2, 333.2 and 343.2 K and pressures from 9.2 to 30 MPa for the acid, and from 8.0 to 14 MPa for the ester. Although the D-12 values were represented by the two correlations, the D-12/T vs. CO2 viscosity and the Schmidt-number correlations, which are valid for more than 40 compounds that we have measured so far, significant temperature dependences were observed for the ester. Moreover, the D-12 values for the ester at 313.2 K downward deviated from the background values around 400 kg m(-3), where the partial molar volumes, obtained from the correlation between the retention factors measured and CO2 densities, showed large negative values.

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  • Measurements of binary diffusion coefficients, retention factors and partial molar volumes for myristoleic acid and its methyl ester in supercritical carbon dioxide

    Chang Yi Kong, Masakazu Mori, Toshitaka Funazukuri, Seiichiro Kagei

    Analytical Sciences   22 ( 11 )   1431 - 1436   2006.11

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    The binary diffusion coefficients, D12, and retention factors for myristoleic acid and its methyl ester at infinite dilution were measured by the chromatographic impulse response technique in supercritical carbon dioxide at temperatures of 313.2, 333.2 and 343.2 K and pressures from 9.2 to 30 MPa for the acid, and from 8.0 to 14 MPa for the ester. Although the D12 values were represented by the two correlations, the D12/T vs. CO2 viscosity and the Schmidt-number correlations, which are valid for more than 40 compounds that we have measured so far, significant temperature dependences were observed for the ester. Moreover, the D12 values for the ester at 313.2 K downward deviated from the background values around 400 kg m-3, where the partial molar volumes, obtained from the correlation between the retention factors measured and CO2 densities, showed large negative values. 2006 © The Japan Society for Analytical Chemistry.

    DOI: 10.2116/analsci.22.1431

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  • Infinite dilution binary diffusion coefficients of several alpha-amino acids in water over a temperature range from (293.2 to 333.2) K with the Taylor dispersion technique

    Tatsuya Umecky, Tomoyuki Kuga, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   51 ( 5 )   1705 - 1710   2006.9

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    Infinite dilution binary diffusion coefficients (D-12) were determined for 10 alpha-amino acids, glycine, alanine, alpha-aminonbutyric acid, norvaline, valine, norleucine, leucine, isoleucine, alloisoleucine, and tert-leucine in water over a temperature range from (293.2 to 333.2) K with the Taylor dispersion technique. At 298.2 K, the literature data for the two alpha-amino acids alloisoleucine and tert-leucine are not available, whereas the determined D-12 values of the others are in good agreement with the data reported previously within the experimental errors of +/- 2.0 %. The D-12 values for all alpha-amino acids studied were well-represented by two simple correlations, and the accuracies for the correlations were examined for each alpha-amino acid.

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  • エンジニアのための流体物性データ

    物性定数編集委員会

    1   145 - 150   2006.9

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  • Binary diffusion coefficients in supercritical fluids: Recent progress in measurements and correlations for binary diffusion coefficients

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    JOURNAL OF SUPERCRITICAL FLUIDS   38 ( 2 )   201 - 210   2006.9

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    Dr. Aydin Akgerman greatly contributed to studies on diffusion in liquids and supercritical fluids, in particular, measurements by the Taylor dispersion method. Based on his work, this article describes recent progress in measurements for binary diffusion coefficients in supercritical fluids by using the chromatographic impulse response technique as well as the Taylor dispersion method, and in the predictive empirical correlations. The data reported in the literature and the proposed correlations are also briefly reviewed together with the research subjects to be investigated in future. (c) 2006 Published by Elsevier B.V.

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  • Binary diffusion coefficients in supercritical fluids: Recent progress in measurements and correlations for binary diffusion coefficients

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    JOURNAL OF SUPERCRITICAL FLUIDS   38 ( 2 )   201 - 210   2006.9

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    Dr. Aydin Akgerman greatly contributed to studies on diffusion in liquids and supercritical fluids, in particular, measurements by the Taylor dispersion method. Based on his work, this article describes recent progress in measurements for binary diffusion coefficients in supercritical fluids by using the chromatographic impulse response technique as well as the Taylor dispersion method, and in the predictive empirical correlations. The data reported in the literature and the proposed correlations are also briefly reviewed together with the research subjects to be investigated in future. (c) 2006 Published by Elsevier B.V.

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  • Infinite dilution binary diffusion coefficients of several alpha-amino acids in water over a temperature range from (293.2 to 333.2) K with the Taylor dispersion technique

    Tatsuya Umecky, Tomoyuki Kuga, Toshitaka Funazukuri

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   51 ( 5 )   1705 - 1710   2006.9

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    Infinite dilution binary diffusion coefficients (D-12) were determined for 10 alpha-amino acids, glycine, alanine, alpha-aminonbutyric acid, norvaline, valine, norleucine, leucine, isoleucine, alloisoleucine, and tert-leucine in water over a temperature range from (293.2 to 333.2) K with the Taylor dispersion technique. At 298.2 K, the literature data for the two alpha-amino acids alloisoleucine and tert-leucine are not available, whereas the determined D-12 values of the others are in good agreement with the data reported previously within the experimental errors of +/- 2.0 %. The D-12 values for all alpha-amino acids studied were well-represented by two simple correlations, and the accuracies for the correlations were examined for each alpha-amino acid.

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  • Noncatalytic hydrolysis of guar gum under hydrothermal conditions

    T Miyazawa, T Funazukuri

    CARBOHYDRATE RESEARCH   341 ( 7 )   870 - 877   2006.5

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    Guar gum, a naturally occurring heteropolysaccharide made of mannose and galactose, was hydrolytically degraded without a catalyst in a batch reactor to produce water-soluble (WS) saccharides including mono- and oligosaccharides. The degradation was carried out under hydrothermal conditions over ranges of temperature from 180 to 240 degrees C and of reaction time from 3 to 60 min. Guar gum was readily dissolved and hydrolyzed, and the major products identified in the WS components were oligosaccharides with degrees of polymerization up to about 20, monosaccharides containing mannose and galactose, and 5-hydroxymethyl-2-furaldehyde (5-HMF). At 200 degrees C, the oligosaccharide yield, obtained from the difference between the yields of the total WS saccharides and monosaccharides, showed the highest value of 94.4% at 7 min among all conditions studied, on the basis of the saccharide content in the initial sample. The oligosaccharide yield decreased with reaction time, and the yield of monosaccharides correspondingly increased, and reached the highest value of 34.5% (mannose 22.8%, galactose 11.7%) at 60 min. The monosaccharides produced were further decomposed to secondary products such as 5-HMF. The maximum yield of 5-HMF obtained was 26.3% at 220 degrees C and 30 min. The production and the decomposition of galactose somewhat preceded those of mannose. (c) 2006 Elsevier Ltd. All rights reserved.

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  • Binary diffusion coefficients and retention factors for polar compounds in supercritical carbon dioxide by chromatographic impulse response method

    CY Kong, T Funazukuri, S Kagei

    JOURNAL OF SUPERCRITICAL FLUIDS   37 ( 3 )   359 - 366   2006.5

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    The chromatographic impulse response (CIR) method with curve fitting was employed for measuring binary diffusion coefficients D-12 at infinite dilution for polar compounds such as benzoic acid and C-1 to C-3 mono-alcohols in supercritical (SC) carbon dioxide at 313.2 K and pressures higher than 9.5 MPa. The measured D-12 values for the polar compounds were expressed with two correlations which well represent binary diffusion coefficients for non-polar and weak polarcompounds, i.e. the correlation of D-12/Tas a function of CO, viscosity and the Schmidt number correlation. Moreover, the slope was -0.5 in logarithmic plot of D-12 versus solute molecular weight over the range of molecular weight from 32 to 1138 at 313.2 K and 11.0 MPa. (c) 2006 Elsevier B.V. All rights reserved.

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  • Binary diffusion coefficients and retention factors for polar compounds in supercritical carbon dioxide by chromatographic impulse response method

    CY Kong, T Funazukuri, S Kagei

    JOURNAL OF SUPERCRITICAL FLUIDS   37 ( 3 )   359 - 366   2006.5

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    The chromatographic impulse response (CIR) method with curve fitting was employed for measuring binary diffusion coefficients D-12 at infinite dilution for polar compounds such as benzoic acid and C-1 to C-3 mono-alcohols in supercritical (SC) carbon dioxide at 313.2 K and pressures higher than 9.5 MPa. The measured D-12 values for the polar compounds were expressed with two correlations which well represent binary diffusion coefficients for non-polar and weak polarcompounds, i.e. the correlation of D-12/Tas a function of CO, viscosity and the Schmidt number correlation. Moreover, the slope was -0.5 in logarithmic plot of D-12 versus solute molecular weight over the range of molecular weight from 32 to 1138 at 313.2 K and 11.0 MPa. (c) 2006 Elsevier B.V. All rights reserved.

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  • Noncatalytic hydrolysis of guar gum under hydrothermal conditions

    T Miyazawa, T Funazukuri

    CARBOHYDRATE RESEARCH   341 ( 7 )   870 - 877   2006.5

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    Guar gum, a naturally occurring heteropolysaccharide made of mannose and galactose, was hydrolytically degraded without a catalyst in a batch reactor to produce water-soluble (WS) saccharides including mono- and oligosaccharides. The degradation was carried out under hydrothermal conditions over ranges of temperature from 180 to 240 degrees C and of reaction time from 3 to 60 min. Guar gum was readily dissolved and hydrolyzed, and the major products identified in the WS components were oligosaccharides with degrees of polymerization up to about 20, monosaccharides containing mannose and galactose, and 5-hydroxymethyl-2-furaldehyde (5-HMF). At 200 degrees C, the oligosaccharide yield, obtained from the difference between the yields of the total WS saccharides and monosaccharides, showed the highest value of 94.4% at 7 min among all conditions studied, on the basis of the saccharide content in the initial sample. The oligosaccharide yield decreased with reaction time, and the yield of monosaccharides correspondingly increased, and reached the highest value of 34.5% (mannose 22.8%, galactose 11.7%) at 60 min. The monosaccharides produced were further decomposed to secondary products such as 5-HMF. The maximum yield of 5-HMF obtained was 26.3% at 220 degrees C and 30 min. The production and the decomposition of galactose somewhat preceded those of mannose. (c) 2006 Elsevier Ltd. All rights reserved.

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  • Decomposition of acetamide and formamide in pressurized hot water

    M Okazaki, T Funazukuri

    JOURNAL OF MATERIALS SCIENCE   41 ( 5 )   1517 - 1521   2006.3

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    Acetamide and formamide were individually decomposed in a pressurized hot water in a tubular flow reactor at temperatures from 573 to 693 K, and pressure of 23 MPa, residence times up to 500 s, and the initial concentrations of both amides from 0.005 to 0.5 mol/L. The major products were ammonia and acetic acid from decomposition of acetamide, and ammonia and formic acid from that of formamide. Formic acid was further decomposed readily into carbon dioxide. Although the decomposition reactions for both amides were represented acceptably by the first order reaction kinetics, the rate constants increased with increasing the initial sample concentrations due to the autocatalytic effect. Apparently the second order reaction kinetics with respect to the concentration of each amide remained more represented the global decomposition rates, and the rate constants decreased with increasing the initial concentrations. The effects of hydrogen peroxide added on the global decomposition rates and the product yields were not evident: the addition slightly lowered the rates, but the major products were almost the same as those in the absence of hydrogen peroxide at temperatures lower than 653 K. Above 653 K more CO2 was produced. (c) 2006 Springer Science + Business Media, Inc.

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  • Solvothermal treatment of starch for the production of glucose and maltooligosaccharides

    T Miyazawa, S Ohtsu, Y Nakagawa, T Funazukuri

    JOURNAL OF MATERIALS SCIENCE   41 ( 5 )   1489 - 1494   2006.3

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    Starch was hydrothermally degraded without any additives over the temperature range from 453 to 563 K at a constant pressure of 10 MPa and the fluid residence times up to 6 min in a semi-batch reactor to produce glucose and maltooligosaccharides. The effects of reaction temperature, flow rate of hot water and residence time of water-soluble components on the product distribution in the solvothermal degradation of starch were investigated. Even at the lowest reaction temperature studied, the loaded starch was partially degraded and dissolved within 8 min by contacting high-temperature and high-pressure water in a semi-batch reactor. By installing a plug-flow reactor at the exit of the first reactor to increase and control precisely the residence time, the maximum glucose yield of 43.8% on the carbon weight basis of the starting material was obtained at 3.64 min and 513 K. The comparison of yields of glucose and 5-hydroxymethyl furfural (HMF), which is a major secondary product, indicates that adjusting the residence time was the most effective to increase the glucose yield and to suppress the 5-HMF production. (c) 2006 Springer Science + Business Media, Inc.

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  • Solvothermal treatment of starch for the production of glucose and maltooligosaccharides

    T Miyazawa, S Ohtsu, Y Nakagawa, T Funazukuri

    JOURNAL OF MATERIALS SCIENCE   41 ( 5 )   1489 - 1494   2006.3

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    Starch was hydrothermally degraded without any additives over the temperature range from 453 to 563 K at a constant pressure of 10 MPa and the fluid residence times up to 6 min in a semi-batch reactor to produce glucose and maltooligosaccharides. The effects of reaction temperature, flow rate of hot water and residence time of water-soluble components on the product distribution in the solvothermal degradation of starch were investigated. Even at the lowest reaction temperature studied, the loaded starch was partially degraded and dissolved within 8 min by contacting high-temperature and high-pressure water in a semi-batch reactor. By installing a plug-flow reactor at the exit of the first reactor to increase and control precisely the residence time, the maximum glucose yield of 43.8% on the carbon weight basis of the starting material was obtained at 3.64 min and 513 K. The comparison of yields of glucose and 5-hydroxymethyl furfural (HMF), which is a major secondary product, indicates that adjusting the residence time was the most effective to increase the glucose yield and to suppress the 5-HMF production. (c) 2006 Springer Science + Business Media, Inc.

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  • Decomposition of acetamide and formamide in pressurized hot water

    M Okazaki, T Funazukuri

    JOURNAL OF MATERIALS SCIENCE   41 ( 5 )   1517 - 1521   2006.3

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    Acetamide and formamide were individually decomposed in a pressurized hot water in a tubular flow reactor at temperatures from 573 to 693 K, and pressure of 23 MPa, residence times up to 500 s, and the initial concentrations of both amides from 0.005 to 0.5 mol/L. The major products were ammonia and acetic acid from decomposition of acetamide, and ammonia and formic acid from that of formamide. Formic acid was further decomposed readily into carbon dioxide. Although the decomposition reactions for both amides were represented acceptably by the first order reaction kinetics, the rate constants increased with increasing the initial sample concentrations due to the autocatalytic effect. Apparently the second order reaction kinetics with respect to the concentration of each amide remained more represented the global decomposition rates, and the rate constants decreased with increasing the initial concentrations. The effects of hydrogen peroxide added on the global decomposition rates and the product yields were not evident: the addition slightly lowered the rates, but the major products were almost the same as those in the absence of hydrogen peroxide at temperatures lower than 653 K. Above 653 K more CO2 was produced. (c) 2006 Springer Science + Business Media, Inc.

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  • Binary diffusion coefficients and retention factors for gamma-linolenic acid and its methyl and ethyl esters in supercritical carbon dioxide

    CY Kong, NRW Withanage, T Funazukuri, S Kagei

    JOURNAL OF SUPERCRITICAL FLUIDS   37 ( 1 )   63 - 71   2006.2

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    Infinite dilution binary diffusion coefficients D-12 and retention factors k for gamma-linolenic acid were measured by chromatographic impulse response technique in supercritical carbon dioxide over the ranges of temperature from 308 to 343 K and pressure from 9 to 30 MPa, together with those for the methyl and ethyl esters at 313 and 343 K and pressures from 8 to 16 MPa. In comparison with literature values for C18 free fatty acids and the esters. the differences in D-12 data were almost indiscernible for each isomer group: alpha- and gamma-linolenic acid, oleic and elaidic acids, oleic and elaidic acid methyl esters, and their ethyl esters. The number of carbon double bonds did not affect the D-12 values significantly. Moreover, the differences in the values between free fatty acid and the ester forms were also small, whereas the D-12 values increased in order of acid to ethyl ester to methyl ester. The validities of the predictive correlations we had proposed such as the D-12/T-CO2 viscosity and the Schmidt number correlation were verified. The retention factor k values for the acid form were much higher than those for the methyl and ethyl esters. The k values were correlated with temperature and CO2 density for each compound, and the solute partial molar volumes were determined from the k-CO2 density correlation. (C) 2005 Elsevier B.V. All rights reserved.

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  • Binary diffusion coefficients and retention factors for gamma-linolenic acid and its methyl and ethyl esters in supercritical carbon dioxide

    CY Kong, NRW Withanage, T Funazukuri, S Kagei

    JOURNAL OF SUPERCRITICAL FLUIDS   37 ( 1 )   63 - 71   2006.2

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    Infinite dilution binary diffusion coefficients D-12 and retention factors k for gamma-linolenic acid were measured by chromatographic impulse response technique in supercritical carbon dioxide over the ranges of temperature from 308 to 343 K and pressure from 9 to 30 MPa, together with those for the methyl and ethyl esters at 313 and 343 K and pressures from 8 to 16 MPa. In comparison with literature values for C18 free fatty acids and the esters. the differences in D-12 data were almost indiscernible for each isomer group: alpha- and gamma-linolenic acid, oleic and elaidic acids, oleic and elaidic acid methyl esters, and their ethyl esters. The number of carbon double bonds did not affect the D-12 values significantly. Moreover, the differences in the values between free fatty acid and the ester forms were also small, whereas the D-12 values increased in order of acid to ethyl ester to methyl ester. The validities of the predictive correlations we had proposed such as the D-12/T-CO2 viscosity and the Schmidt number correlation were verified. The retention factor k values for the acid form were much higher than those for the methyl and ethyl esters. The k values were correlated with temperature and CO2 density for each compound, and the solute partial molar volumes were determined from the k-CO2 density correlation. (C) 2005 Elsevier B.V. All rights reserved.

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  • Polysaccharide hydrolysis accelerated by adding carbon dioxide under hydrothermal conditions

    T Miyazawa, T Funazukuri

    BIOTECHNOLOGY PROGRESS   21 ( 6 )   1782 - 1785   2005.11

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    Polysaccharides such as agar, guar gum, starch, and xylan were hydrolyzed to produce mono- and oligosaccharides under hydrothermal conditions with and without carbon dioxide in a small batch reactor. The molecular weight distributions of the polysaccharide hydrolyzates shifted to lower molecular weights by increasing the carbon dioxide load, corresponding to higher pressures of carbon dioxide. For example, the yield of glucose produced from the hydrolysis of starch at 200 degrees C was increased significantly from 3.7% to 53.0% (on a carbon weight basis) of the initial polysaccharide by increasing carbon dioxide load in a reaction time of 15 min. Carbonic acid generated from water and carbon dioxide appeared to lower the pH of high-temperature and high-pressure water. Polysaccharide hydrolysis under hydrothermal conditions in the presence of carbon dioxide is an environmentally benign method to produce mono- and oligosaccharides because the process does not require the use of conventional acids and bases followed by neutralization and separation.

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  • Polysaccharide hydrolysis accelerated by adding carbon dioxide under hydrothermal conditions

    T Miyazawa, T Funazukuri

    BIOTECHNOLOGY PROGRESS   21 ( 6 )   1782 - 1785   2005.11

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    Polysaccharides such as agar, guar gum, starch, and xylan were hydrolyzed to produce mono- and oligosaccharides under hydrothermal conditions with and without carbon dioxide in a small batch reactor. The molecular weight distributions of the polysaccharide hydrolyzates shifted to lower molecular weights by increasing the carbon dioxide load, corresponding to higher pressures of carbon dioxide. For example, the yield of glucose produced from the hydrolysis of starch at 200 degrees C was increased significantly from 3.7% to 53.0% (on a carbon weight basis) of the initial polysaccharide by increasing carbon dioxide load in a reaction time of 15 min. Carbonic acid generated from water and carbon dioxide appeared to lower the pH of high-temperature and high-pressure water. Polysaccharide hydrolysis under hydrothermal conditions in the presence of carbon dioxide is an environmentally benign method to produce mono- and oligosaccharides because the process does not require the use of conventional acids and bases followed by neutralization and separation.

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  • Dechlorination of poly(vinyl chloride)with aqueous ammonia solution under hydrothermal conditions Reviewed

    Y. Akaike, Y. Wakayama, K. Hashimoto, T. Funazukuri

    Feedstock Recycling of Plastics   141 - 146   2005.9

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  • Hydrothermal dechlorination of poly(vinyl chloride) in the absence and the presence of hydrogen peroxide

    S. Suga, Y. Wakayama, T. Funazukuri

    Feedstock Recycling of Plastics   175 - 181   2005.9

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  • Dechlorination of poly(vinyl chloride)with aqueous ammonia solution under hydrothermal conditions

    Y. Akaike, Y. Wakayama, K. Hashimoto, T. Funazukuri

    Feedstock Recycling of Plastics   141 - 146   2005.9

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  • Binary diffusion coefficients and retention factors for long-chain triglycerides in supercritical carbon dioxide by the chromatographic impulse response method

    Chang Yi Kong, Nirosha R. W. Withanage, Toshitaka Funazukuri, Seiichiro Kagei

    Journal of Chemical and Engineering Data   50 ( 5 )   1635 - 1640   2005.9

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    Infinite dilution binary diffusion coefficients D12 and retention factors k have been measured in supercritical carbon dioxide for the long-chain triglyceride triarachidonin at 313.2 K at (10 to 30) MPa, and trierucin and trinervonin both at 308.2 K to 323.2 K over the pressure range from (9 to 30) MPa by the Chromatographic impulse response method. It was found that the D12 predictive correlations proposed previously, D 12/T as a function of viscosity and the Schmidt number correlations, were valid for such long-chain triglycerides having molecular weights near or over 1000. Furthermore, partial molar volumes of the solutes were determined from the relationships between k and CO2 density. © 2005 American Chemical Society.

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  • Binary diffusion coefficients and retention factors for long-chain triglycerides in supercritical carbon dioxide by the chromatographic impulse response method

    Chang Yi Kong, Nirosha R. W. Withanage, Toshitaka Funazukuri, Seiichiro Kagei

    Journal of Chemical and Engineering Data   50 ( 5 )   1635 - 1640   2005.9

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    Infinite dilution binary diffusion coefficients D12 and retention factors k have been measured in supercritical carbon dioxide for the long-chain triglyceride triarachidonin at 313.2 K at (10 to 30) MPa, and trierucin and trinervonin both at 308.2 K to 323.2 K over the pressure range from (9 to 30) MPa by the Chromatographic impulse response method. It was found that the D12 predictive correlations proposed previously, D 12/T as a function of viscosity and the Schmidt number correlations, were valid for such long-chain triglycerides having molecular weights near or over 1000. Furthermore, partial molar volumes of the solutes were determined from the relationships between k and CO2 density. © 2005 American Chemical Society.

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  • Hydrothermal dechlorination of poly(vinyl chloride) in the absence and the presence of hydrogen peroxide Reviewed

    S. Suga, Y. Wakayama, T. Funazukuri

    Feedstock Recycling of Plastics   175 - 181   2005.9

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  • 化学工学辞典 改訂4版

    名による共

    2005.2

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  • Correction of the secondary flow effect for binary diffusion coefficients using coated/uncoated diffusion columns

    T Funazukuri, CY Kong, S Kagei

    CHEMICAL ENGINEERING SCIENCE   59 ( 14 )   3029 - 3036   2004.7

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    To determine binary diffusion coefficients from tracer response measurements with a coiled capillary column (curved tube) at relatively high flow rates, a conversion formula to correct for the secondary flow effect was derived from the second central moment of the impulse response curve. Its practical expression was obtained analytically by the perturbation method up to lambda(10), where lambda is the ratio of the tube radius to the coil radius. The reliability of the correction was evaluated by an alternative series of lambda. As a result, the effective range of DeSc(1/2) < 8-9.5 without correction widened to DeSc(1/2) < 18-19 to determine the diffusion coefficient within 1% error. Applicability of the correction was demonstrated for phenol and ubiquinone CoQ10 using a coated column, and for benzene using an uncoated column (the Taylor dispersion), in supercritical carbon dioxide at 16-17 MPa and 313.15 K. (C) 2004 Elsevier Ltd. All rights reserved.

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  • Measurement of binary diffusion coefficient from impulse response curve having extremely low absorbance intensity under supercritical condition by noise elimination technique

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    Fluid Phase Equilibria   220 ( 2 )   181 - 188   2004.6

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    A noise elimination technique was applied to the determination of binary diffusion coefficients D12 from the response curves having extremely low absorbance intensities in impulse response methods under supercritical conditions of carbon dioxide. The effectiveness of this technique was experimentally examined for the analyses of response curves through both the curve-fitting and the moment methods in two cases: the chromatographic impulse response method for phenol and β-carotene with a polymer-coated capillary column, and the Taylor dispersion method for acetone with an uncoated capillary column. Unreliable D12 values were obtained from the moment method of the response curves at lower absorbance intensities, even treated with noise elimination. The curve-fitting method with the noise elimination treatment was quite effective for determining the D12 values accurately, and was valid at the lowest absorbance intensities, on the order of 10-4 absorbance unit of UV-Vis multi-detector, corresponding to the smallest quantity of the solute, i.e. 6×10-5, 6×10-6, and 5×10-2 μ mol for phenol, β-carotene, and acetone, respectively, under conditions studied. Infinite dilution regions for binary diffusion coefficients were obtained by injecting various amounts: the binary diffusion coefficients showed constant values at concentrations less than 0.6, 0.004, and 0.08 mol m-3 for phenol, β-carotene, and acetone, respectively, in supercritical carbon dioxide at 313.2 K and 16-18 MPa. © 2004 Elsevier B.V. All rights reserved.

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  • Measurement of binary diffusion coefficient from impulse response curve having extremely low absorbance intensity under supercritical condition by noise elimination technique

    T Funazukuri, CY Kong, S Kagei

    FLUID PHASE EQUILIBRIA   220 ( 2 )   181 - 188   2004.6

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    A noise elimination technique was applied to the determination of binary diffusion coefficients D-12 from the response curves having extremely low absorbance intensities in impulse response methods under supercritical conditions of carbon dioxide. The effectiveness of this technique was experimentally examined for the analyses of response curves through both the curve-fitting and the moment methods in two cases: the chromatographic impulse response method for phenol and beta-carotene with a polymer-coated capillary column, and the Taylor dispersion method for acetone with an uncoated capillary column. Unreliable D-12 values were obtained from the moment method of the response curves at lower absorbance intensities, even treated with noise elimination. The curve-fitting method with the noise elimination treatment was quite effective for determining the D-12 values accurately, and was valid at the lowest absorbance intensities, on the order of 10(-4) absorbance unit of UV-Vis multi-detector, corresponding to the smallest quantity of the solute, i.e. 6 x 10(-5), 6 x 10(-6), and 5 x 10(-2) mu mol for phenol, beta-carotene, and acetone, respectively, under conditions studied. Infinite dilution regions for binary diffusion coefficients were obtained by injecting various amounts: the binary diffusion coefficients showed constant values at concentrations less than 0.6, 0.004, and 0.08 mol m(-3) for phenol, beta-carotene, and acetone, respectively, in supercritical carbon dioxide at 313.2 K and 16-18 MPa. (C) 2004 Elsevier B.V. All rights reserved.

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  • Correction of the secondary flow effect for binary diffusion coefficients using coated/uncoated diffusion column Reviewed

    T. Funazukuri, C. Y. Kong, S. Kagei

    Chemical Engineering Science   59   3029 - 3036   2004.6

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  • Impulse response techniques to measure binary diffusion coefficients under supercritical conditions

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    Journal of Chromatography A   1037 ( 1-2 )   411 - 429   2004.5

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    This review describes impulse response techniques with a curve-fitting method to measure thermodynamic properties, such as binary diffusion coefficient, retention factor, and partial molar volume, under supercritical conditions. Theoretical background, parameter sensitivity, sources of experimental error, noise elimination technique, and the correction of apparent binary diffusion coefficients due to column coiling are discussed based on recent studies, together with data sources and predictive correlations for binary diffusion coefficients. © 2004 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.chroma.2004.03.043

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  • Chromatographic impulse response technique with curve fitting to measure binary diffusion coefficients and retention factors using polymer-coated capillary columns

    Chang Yi Kong, Toshitaka Funazukuri, Seiichiro Kagei

    Journal of Chromatography A   1035 ( 2 )   177 - 193   2004.5

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    The theoretical basis of a Gaussian-like approximate solution was applied to a chromatographic impulse response technique with curve fitting for measuring binary diffusion coefficients and retention factors using a polymer-coated capillary column. The formulae were derived for evaluating both the accuracy of the approximate solution and the sensitivity of the parameters. The validity of the solution also was confirmed experimentally for pulse injection of phenol in acetone into supercritical carbon dioxide flowing at 313.15K and 11.6-28.6MPa. Potential sources for experimental errors of the method are discussed. © 2004 Elsevier B.V. All rights reserved.

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  • Impulse response techniques to measure binary diffusion coefficients under supercritical conditions

    T Funazukuri, CY Kong, S Kagei

    JOURNAL OF CHROMATOGRAPHY A   1037 ( 1-2 )   411 - 429   2004.5

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    Language:English   Publishing type:Book review, literature introduction, etc.   Publisher:ELSEVIER SCIENCE BV  

    This review describes impulse response techniques with a curve-fitting method to measure thermodynamic properties, such as binary diffusion coefficient. retention factor, and partial molar volume, under supercritical conditions. Theoretical background, parameter sensitivity, sources of experimental error, noise elimination technique, and the correction of apparent binary diffusion coefficients due to column coiling are discussed based on recent studies, together with data sources and predictive correlations for binary diffusion coefficients. (C) 2004 Elsevier B.V. All rights reserved.

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  • Effects of molecular weight and degree of unsaturation on binary diffusion coefficients for lipids in supercritical carbon dioxide

    T Funazukuri, CY Kong, S Kagei

    FLUID PHASE EQUILIBRIA   219 ( 1 )   67 - 73   2004.5

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    Infinite dilution binary diffusion coefficients and retention factors for the oleic acid family such as oleic acid, methyl- and ethyl esters, and mono-, di, and triglycerides at 313.21 K and 8-30 MPa, and for other 13 lipids consisting of C18-C22 unsaturated fatty acid constituents at 313.21 K and 11 MPa were measured in carbon dioxide by a chromatographic impulse response method with a polymer coated capillary column. The binary diffusion coefficients and the retention factors for each compound decreased with increasing pressure. The binary diffusion coefficients could be represented by a Schmidt number correlation and by an empirical equation written in terms of temperature and CO2 viscosity. The retention factors for each solute could be expressed in terms of CO2 density. While the binary diffusion coefficients at 313.21 K and 11 MPa decreased with solute molecular weight, those for compounds having the same carbon numbers in each group, such as methyl ester, ethyl ester, and triglyceride, decreased with increasing the number of C-C double bonds. (C) 2004 Elsevier B.V. All rights reserved.

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  • Effects of molecular weight and degree of unsaturation on binary diffusion coefficients for lipids in supercritical carbon dioxide

    T Funazukuri, CY Kong, S Kagei

    FLUID PHASE EQUILIBRIA   219 ( 1 )   67 - 73   2004.5

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    Infinite dilution binary diffusion coefficients and retention factors for the oleic acid family such as oleic acid, methyl- and ethyl esters, and mono-, di, and triglycerides at 313.21 K and 8-30 MPa, and for other 13 lipids consisting of C18-C22 unsaturated fatty acid constituents at 313.21 K and 11 MPa were measured in carbon dioxide by a chromatographic impulse response method with a polymer coated capillary column. The binary diffusion coefficients and the retention factors for each compound decreased with increasing pressure. The binary diffusion coefficients could be represented by a Schmidt number correlation and by an empirical equation written in terms of temperature and CO2 viscosity. The retention factors for each solute could be expressed in terms of CO2 density. While the binary diffusion coefficients at 313.21 K and 11 MPa decreased with solute molecular weight, those for compounds having the same carbon numbers in each group, such as methyl ester, ethyl ester, and triglyceride, decreased with increasing the number of C-C double bonds. (C) 2004 Elsevier B.V. All rights reserved.

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  • Hydrothermal production of mono(galacturonic acid) and the oligomers from poly(galacturonic acid) with water under pressures

    T Miyazawa, T Funazukuri

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   43 ( 10 )   2310 - 2314   2004.5

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    A monosaccharide of galacturonic acid and its oligomers were produced by hydrolysis of poly(galacturonic acid)s with water in the absence of any additives in a semibatch flow reactor over the temperature range from 453 to 533 K at 10 MPa. A solid sample of poly(galacturonic acid) was fixed in the reactor, and the residence times of water in the reactor were estimated to be less than a few seconds. At 493 K and a heating time of 2 min, 79 wt % of the initial sample on the carbon weight basis was converted into water-soluble components, which consisted of monomer and oligomers having various degrees of polymerization (DP) and were enzymatically hydrolyzable into mono(galacturonic acid), the dimer, and the trimer. The maximum yields of monomer and oligomers with DP = 2-10 were 11.4 and 22.1 wt %, respectively, on the carbon weight basis of the initial sample at 533 K, 10 MPa, and a heating time of 2 min. The yield of each product was correlated with the content of organic carbon in the eluted product solution. The formation of the further decomposed products such as furfural and gaseous products was insignificant under the hydrolysis conditions studied.

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  • Hydrothermal production of mono(galacturonic acid) and the oligomers from poly(galacturonic acid) with water under pressures

    T Miyazawa, T Funazukuri

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   43 ( 10 )   2310 - 2314   2004.5

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    A monosaccharide of galacturonic acid and its oligomers were produced by hydrolysis of poly(galacturonic acid)s with water in the absence of any additives in a semibatch flow reactor over the temperature range from 453 to 533 K at 10 MPa. A solid sample of poly(galacturonic acid) was fixed in the reactor, and the residence times of water in the reactor were estimated to be less than a few seconds. At 493 K and a heating time of 2 min, 79 wt % of the initial sample on the carbon weight basis was converted into water-soluble components, which consisted of monomer and oligomers having various degrees of polymerization (DP) and were enzymatically hydrolyzable into mono(galacturonic acid), the dimer, and the trimer. The maximum yields of monomer and oligomers with DP = 2-10 were 11.4 and 22.1 wt %, respectively, on the carbon weight basis of the initial sample at 533 K, 10 MPa, and a heating time of 2 min. The yield of each product was correlated with the content of organic carbon in the eluted product solution. The formation of the further decomposed products such as furfural and gaseous products was insignificant under the hydrolysis conditions studied.

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  • Chromatographic impulse response technique with curve fitting to measure binary diffusion coefficients and retention factors using polymer-coated capillary columns

    CY Kong, T Funazukuri, S Kagei

    JOURNAL OF CHROMATOGRAPHY A   1035 ( 2 )   177 - 193   2004.5

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    The theoretical basis of a Gaussian-like approximate solution was applied to a chromatographic impulse response technique with curve fitting for measuring binary diffusion coefficients and retention factors using a polymer-coated capillary column. The formulae were derived for evaluating both the accuracy of the approximate solution and the sensitivity of the parameters. The validity of the solution also was confirmed experimentally for pulse injection of phenol in acetone into supercritical carbon dioxide flowing at 313.15 K and 11.6-28.6 MPa. Potential sources for experimental errors of the method are discussed. (C) 2004 Elsevier B.V All rights reserved.

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  • Glucose production by hydrolysis of starch under hydrothermal conditions

    M Nagamori, T Funazukuri

    JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY   79 ( 3 )   229 - 233   2004.3

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    Starch was converted into glucose by hydrolysis with water under hydrothermal conditions at 453 - 513 K in a small batch reactor. The major product was glucose; oligomers having various degrees of polymerization, maltose, fructose, 5-hydroxymethylfurfural and furfural were also produced. The maximum yield of glucose obtained was 630 g kg(-1) on the carbon basis at 473 K and 30 min, where the quantity of carbon unrecovered was about 50 g kg(-1), and the production of char and gaseous products was negligible. (C) 2004 Society of Chemical Industry.

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  • Glucose production by hydrolysis of starch under hydrothermal conditions

    M Nagamori, T Funazukuri

    JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY   79 ( 3 )   229 - 233   2004.3

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    Starch was converted into glucose by hydrolysis with water under hydrothermal conditions at 453 - 513 K in a small batch reactor. The major product was glucose; oligomers having various degrees of polymerization, maltose, fructose, 5-hydroxymethylfurfural and furfural were also produced. The maximum yield of glucose obtained was 630 g kg(-1) on the carbon basis at 473 K and 30 min, where the quantity of carbon unrecovered was about 50 g kg(-1), and the production of char and gaseous products was negligible. (C) 2004 Society of Chemical Industry.

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  • クロマトグラフィックインパルス応答法による超臨界流体中における有機化合物の相互拡散係数の測定

    船造俊孝, 孔昌一, 影井清一郎

    高圧力の科学と技術   14 ( 1 )   4 - 11   2004.2

  • Measurements of Binary Diffusion Coefficients for Organic Compounds in Supercritical Fluids by Chromatographic Impulse Response Method

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu   14 ( 1 )   4 - 11   2004

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    The chromatographic impulse response technique with the curve fitting method is a useful tool to measure binary diffusion coefficient under supercritical conditions. Based on our recent measurement data, the effectiveness of the simple predictive correlations such as the D 12-viscosity correlation and the Schmidt number correlation is presented. Moreover, the sensitivities of the parameters determined and sources of experimental error are discussed.

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  • Binary diffusion coefficients, partition ratios and partial molar volumes at infinite dilution for beta-carotene and alpha-tocopherol in supercritical carbon dioxide

    T Funazukuri, CY Kong, S Kagei

    JOURNAL OF SUPERCRITICAL FLUIDS   27 ( 1 )   85 - 96   2003.9

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    Binary diffusion coefficients D-12 and partition ratios k at infinite dilution for beta-carotene and alpha-tocopherol in supercritical carbon dioxide were measured at temperatures from 308.15 to 333.15 K and pressures from 9 to 30 MPa by a tracer response technique with a poly(ethylene glycol) coated capillary column. Both parameters, simultaneously determined by fitting the calculated response curve to that measured experimentally, were well represented with the correlations: the D-12/T values were correlated with CO2 viscosity, and the k values were expressed with a function of temperature and CO2 density. However, the partial molar volumes obtained from the k values were not well consistent with those estimated using equation of states having the interaction parameters k(ij) reported in the literature. (C) 2002 Elsevier Science B.V. All rights reserved.

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  • Binary diffusion coefficients, partition ratios and partial molar volumes at infinite dilution for β-carotene and α-tocopherol in supercritical carbon dioxide

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    Journal of Supercritical Fluids   27 ( 1 )   85 - 96   2003.9

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    Binary diffusion coefficients D12 and partition ratios k at infinite dilution for β-carotene and α-tocopherol in supercritical carbon dioxide were measured at temperatures from 308.15 to 333.15 K and pressures from 9 to 30 MPa by a tracer response technique with a poly(ethylene glycol) coated capillary column. Both parameters, simultaneously determined by fitting the calculated response curve to that measured experimentally, were well represented with the correlations: the D12/T values were correlated with CO2 viscosity, and the k values were expressed with a function of temperature and CO2 density. However, the partial molar volumes obtained from the k values were not well consistent with those estimated using equation of states having the interaction parameters k ij reported in the literature. © 2002 Elsevier Science B.V. All rights reserved.

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  • Measurements of binary diffusion coefficient and partition ratio at infinite dilution for linoleic acid and arachidonic acid in supercritical carbon dioxide

    T Funazukuri, CY Kong, T Kikuchi, S Kagei

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   48 ( 3 )   684 - 688   2003.5

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    The binary diffusion coefficient D-12 and partition ratio k were measured for two omega6 group compounds, linoleic acid and arachidonic acid, at infinite dilution in carbon dioxide at temperatures from 308.15 K to 343.15 K and pressures from 9 MPa to 30 MPa by a tracer response technique with a poly(ethylene glycol)-coated capillary column. The measured D-12 values were well represented by a correlation of D-12/T versus CO2 viscosity and by the Schmidt number correlation for each solute, and the k values were well represented as a function of temperature and CO2 density. Partial molar volumes were also obtained from the k values.

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  • Measurements of binary diffusion coefficient and partition ratio at infinite dilution for linoleic acid and arachidonic acid in supercritical carbon dioxide

    T Funazukuri, CY Kong, T Kikuchi, S Kagei

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   48 ( 3 )   684 - 688   2003.5

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    The binary diffusion coefficient D-12 and partition ratio k were measured for two omega6 group compounds, linoleic acid and arachidonic acid, at infinite dilution in carbon dioxide at temperatures from 308.15 K to 343.15 K and pressures from 9 MPa to 30 MPa by a tracer response technique with a poly(ethylene glycol)-coated capillary column. The measured D-12 values were well represented by a correlation of D-12/T versus CO2 viscosity and by the Schmidt number correlation for each solute, and the k values were well represented as a function of temperature and CO2 density. Partial molar volumes were also obtained from the k values.

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  • Binary diffusion coefficient, partition ratio, and partial molar volume for docosahexaenoic acid, eicosapentaenoic acid and alpha-linolenic acid at infinite dilution in supercritical carbon dioxide

    T Funazukuri, CY Kong, S Kagei

    FLUID PHASE EQUILIBRIA   206 ( 1-2 )   163 - 178   2003.4

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    A tracer response technique with a poly(ethylene glycol) coated capillary column was employed to measure binary diffusion coefficient and partition ratio for the omega3 group of long chain unsaturated fatty acids such as docosahexaenoic acid, eicosapentaenoic acid and a-linolenic acid at infinite dilution in supercritical (SC) carbon dioxide at temperatures from 308.15 to 343.15 K and pressures from 9 to 30 MPa. The binary diffusion coefficients for each solute were expressed with the Schmidt number correlation as well as the correlation with temperature and CO2 viscosity. The partition ratios were correlated with temperature and CO2 density. Moreover, the partial molar volumes were obtained from the partition ratios for each solute. (C) 2002 Elsevier Science B.V All rights reserved.

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  • Binary diffusion coefficient, partition ratio, and partial molar volume for docosahexaenoic acid, eicosapentaenoic acid and alpha-linolenic acid at infinite dilution in supercritical carbon dioxide

    T Funazukuri, CY Kong, S Kagei

    FLUID PHASE EQUILIBRIA   206 ( 1-2 )   163 - 178   2003.4

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    A tracer response technique with a poly(ethylene glycol) coated capillary column was employed to measure binary diffusion coefficient and partition ratio for the omega3 group of long chain unsaturated fatty acids such as docosahexaenoic acid, eicosapentaenoic acid and a-linolenic acid at infinite dilution in supercritical (SC) carbon dioxide at temperatures from 308.15 to 343.15 K and pressures from 9 to 30 MPa. The binary diffusion coefficients for each solute were expressed with the Schmidt number correlation as well as the correlation with temperature and CO2 viscosity. The partition ratios were correlated with temperature and CO2 density. Moreover, the partial molar volumes were obtained from the partition ratios for each solute. (C) 2002 Elsevier Science B.V All rights reserved.

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  • Infinite-dilution binary diffusion coefficient, partition ratio, and partial molar volume for ubiquinone CoQ10 in supercritical carbon dioxide

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    Industrial and Engineering Chemistry Research   41 ( 11 )   2812 - 2818   2002.5

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    Infinite-dilution binary diffusion coefficient D12 and partition ratio k for ubiquinone CoQ10 in carbon dioxide were measured by a tracer response technique with a poly(ethylene glycol)-coated capillary column at temperatures from 308.15 to 333.15 K and pressures from 8.5 to 30 MPa. D12 and k values were simultaneously determined from a measured response curve by the curvefitting method. The fitting error between measured and calculated response curves increased with decreasing pressure, as had been the case in our previous studies on various solutes in supercritical CO2 by the Taylor dispersion method. The D12 values were correlated with temperature and CO2 viscosity and the k values with temperature and CO2 density. Moreover, partial molar volumes of CoQ10 in supercritical CO2 were obtained from the k values.

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  • Infinite-dilution binary diffusion coefficient, partition ratio, and partial molar volume for ubiquinone CoQ10 in supercritical carbon dioxide

    T Funazukuri, CY Kong, S Kagei

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   41 ( 11 )   2812 - 2818   2002.5

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    Infinite-dilution binary diffusion coefficient D-12 and partition ratio k for ubiquinone CoQ10 in carbon dioxide were measured by a tracer response technique with a poly(ethylene glycol)-coated capillary column at temperatures from 308.15 to 333.15 K and pressures from 8.5 to 30 MPa. D12 and k values were simultaneously determined from a measured response curve by the curve-fitting method. The fitting error between measured and calculated response curves increased with decreasing pressure, as had been the case in our previous studies on various solutes in supercritical CO2 by the Taylor dispersion method. The D12 values were correlated with temperature and CO2 viscosity and the k values with temperature and CO2 density. Moreover, partial molar volumes of CoQ10 in supercritical CO2 were obtained from the k values.

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  • Measurements of binary diffusion coefficients for some low volatile compounds in supercritical carbon dioxide by input-output response technique with two diffusion columns connected in series

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    Fluid Phase Equilibria   194-197   1169 - 1178   2002.3

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    Binary diffusion coefficients (D12) for low volatile compounds such as Vitamin K3, ubiquinone (UQ-10), α-tocopherol, β-carotene, and phenol in supercritical carbon dioxide were measured by the Taylor dispersion method with two columns connected in series: a poly(ethylene glycol) (PEG) coated capillary column followed by a stainless steel uncoated capillary column, at 313.15K and pressures from 9 to 30MPa. The tracer species dissolved with a common organic solvent such as hexane or chloroform was injected to the diffusion column as a delta shot through an ordinary HPLC injector. The response curve measured at the exit of the first column, coated with PEG, was regarded as an input signal, and that measured at the exit of the second column made of the uncoated stainless steel tubing as the output signal. The tracer species and the organic solvent were separated during flowing in the first column. The output response signal was calculated from the input signal and the inverse Laplace transform of the transfer function through the convolution integral. The D12 values were determined by fitting the calculated output curve to that measured experimentally. The measured D12 values were fully consistent with those measured with the PEG coated capillary column for one point measurement reported [Ind. Eng. Chem. Res. 39 (2000) 4462]. This two-point measurements with the two columns were adequate for measuring D12 values for low volatile compounds in supercritical fluids. © 2002 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0378-3812(01)00717-8

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  • Measurements of binary diffusion coefficients for some low volatile compounds in supercritical carbon dioxide by input-output response technique with two diffusion columns connected in series

    T Funazukuri, CY Kong, S Kagei

    FLUID PHASE EQUILIBRIA   194   1169 - 1178   2002.3

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    Binary diffusion coefficients (D-12) for low volatile compounds such as Vitamin K-3. ubiquinone (UQ-10), alpha-tocopherol, beta-carotene, and phenol in supercritical carbon dioxide were measured by the Taylor dispersion method with two columns connected in series: a poly(ethylene glycol) (PEG) coated capillary column followed by a stainless steel uncoated capillary column. at 313.15 K and pressures from 9 to 30 MPa. The tracer species dissolved with a common organic solvent such as hexane or chloroform was injected to the diffusion column as a delta shot through an ordinary HPLC injector. The response curve measured at the exit of the first column, coated with PEG. was regarded as an input signal, and that measured at the exit of the second column made of the uncoated stainless steel tubing as the output signal. The tracer species and the organic solvent were separated during flowing in the first column. The output response signal was calculated from the input signal and the inverse Laplace transform of the transfer function through the convolution integral. The D-12 values were determined by fitting the calculated output curve to that measured experimentally. The measured D-12 values were fully consistent with those measured with the PEG coated capillary column for one point measurement reported [Ind. Eng. Chem. Res. 39 (2000) 4462]. This two-point measurements with the two columns were adequate for measuring D-12 values for low volatile compounds in supercritical fluids. (C) 2002 Elsevier Science B.V. All rights reserved.

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  • Rare earth salt catalyzed asymmetric Diels-Alder reaction with a chiral dienophile in supercritical carbon dioxide: Enhancement effect on stereoselectivity

    SI Fukuzawa, K Metoki, Y Komuro, T Funazukuri

    SYNLETT   ( 1 )   134 - 136   2002.1

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    The rare earth(III) salt catalyzed asymmetric Diels-Alder reaction of cyclopentadiene with a chiral dienophile in super-critical carbon dioxide (scCO(2)) proceeded rapidly to give the adduct with a higher diastereoselectivity than that in dichloromethane; optimization of the CO2 density increased the de value up to 77%.

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  • Rare earth salt catalyzed asymmetric Diels-Alder reaction with a chiral dienophile in supercritical carbon dioxide: Enhancement effect on stereoselectivity

    SI Fukuzawa, K Metoki, Y Komuro, T Funazukuri

    SYNLETT   ( 1 )   134 - 136   2002.1

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    The rare earth(III) salt catalyzed asymmetric Diels-Alder reaction of cyclopentadiene with a chiral dienophile in super-critical carbon dioxide (scCO(2)) proceeded rapidly to give the adduct with a higher diastereoselectivity than that in dichloromethane; optimization of the CO2 density increased the de value up to 77%.

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  • Infinite dilution binary diffusion coefficients of benzene in carbon dioxide by the Taylor dispersion technique at temperatures from 308.15 to 328.15 K and pressures from 6 to 30 MPa

    T Funazukuri, CY Kong, S Kagei

    INTERNATIONAL JOURNAL OF THERMOPHYSICS   22 ( 6 )   1643 - 1660   2001.11

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    Infinite dilution binary diffusion coefficients, D-12, of benzene in carbon dioxide were measured by the Taylor dispersion technique at temperatures from 308.15 to 328.15 K and pressures from 6 to 30 MPa. The diffusion coefficients were obtained by the method of fitting in the time domain from the response curves measured with a UV vis multidetector by scanning from 220 to 280 nm at increments of I or 4 rim. The wavelength dependences on the binary diffusion coefficient and the uncertainty were examined. The detector linearity, in terms of the relationship between the absorbance intensity and the product of the peak area of the response curve and CO2 velocity, was found to fail at some characteristic absorption wavelengths such as 243, 248, 253, and 259 nm, even when the maximum absorbance intensities of the response curves were less than 0.5 and the fits were good. Although the D-12 values obtained from the response curves measured at 253 nm were almost consistent with some literature data, the D-12 values measured at wavelengths showing the detector linearity to be satisfactory, i.e., at 239 nm, were higher than those at 253 nm. The present D-12 data at 239 nm were well represented by the Sclimidt number correlation, except for those showing the anomalous decrease in a plot of D-12 vs density in the density range from 250 to 500 kg (.) m(-3).

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  • Infinite dilution binary diffusion coefficients of benzene in carbon dioxide by the Taylor dispersion technique at temperatures from 308.15 to 328.15 K and pressures from 6 to 30 MPa

    T Funazukuri, CY Kong, S Kagei

    INTERNATIONAL JOURNAL OF THERMOPHYSICS   22 ( 6 )   1643 - 1660   2001.11

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    Infinite dilution binary diffusion coefficients, D-12, of benzene in carbon dioxide were measured by the Taylor dispersion technique at temperatures from 308.15 to 328.15 K and pressures from 6 to 30 MPa. The diffusion coefficients were obtained by the method of fitting in the time domain from the response curves measured with a UV vis multidetector by scanning from 220 to 280 nm at increments of I or 4 rim. The wavelength dependences on the binary diffusion coefficient and the uncertainty were examined. The detector linearity, in terms of the relationship between the absorbance intensity and the product of the peak area of the response curve and CO2 velocity, was found to fail at some characteristic absorption wavelengths such as 243, 248, 253, and 259 nm, even when the maximum absorbance intensities of the response curves were less than 0.5 and the fits were good. Although the D-12 values obtained from the response curves measured at 253 nm were almost consistent with some literature data, the D-12 values measured at wavelengths showing the detector linearity to be satisfactory, i.e., at 239 nm, were higher than those at 253 nm. The present D-12 data at 239 nm were well represented by the Sclimidt number correlation, except for those showing the anomalous decrease in a plot of D-12 vs density in the density range from 250 to 500 kg (.) m(-3).

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  • 爆砕操作による醤油搾り粕の資源化処理-温水抽出との比較 Reviewed

    船造俊孝, 内田珠理, 廣瀬直子, 影井清一郎

    環境科学会誌   14 ( 4 )   359 - 365   2001.7

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    DOI: 10.11353/sesj1988.14.359

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  • 個別生産プロセスにおけるアウトプット-インプット, インプット-アウトプットデータベース Reviewed

    吉田弘之, 船造俊孝

    環境科学会誌   14 ( 4 )   333 - 343   2001.7

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    DOI: 10.11353/sesj1988.14.333

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    Other Link: https://jlc.jst.go.jp/DN/JALC/00075012724?from=CiNii

  • トレーサー応答法による超臨界二酸化炭素中におけるフェノールの無限希釈相互拡散係数と分配係数の測定 Reviewed

    船造俊孝, 孔昌一, 影井清一郎

    中央大学理工学研究所論文集   ( 6 )   41 - 53   2001.3

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  • Measurements of binary diffusion coefficients and partition ratios for acetone, phenol, alpha-tocopherol, and beta-carotene in supercritical carbon dioxide with a poly(ethylene glycol)-coated capillary column

    T Funazukuri, CY Kong, N Murooka, S Kagei

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   39 ( 12 )   4462 - 4469   2000.12

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    Binary diffusion coefficients, D-12, and partition ratios, k, for the poly(ethylene glycol) (PEG) layer to supercritical carbon dioxide for acetone and some solid solutes such as phenol, alpha -tocopherol, and beta -carotene were measured with a PEG-coated capillary column by a tracer response technique. The D-12 values for acetone with the PEG-coated column were consistent with those measured by the Taylor dispersion method in which an uncoated capillary column was employed. The D-12 and k values for all of the solutes decrease simply with increasing pressure, and the D-12 values were represented by the Schmidt number correlation.

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  • Measurements of binary diffusion coefficients and partition ratios for acetone, phenol, alpha-tocopherol, and beta-carotene in supercritical carbon dioxide with a poly(ethylene glycol)-coated capillary column

    T Funazukuri, CY Kong, N Murooka, S Kagei

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   39 ( 12 )   4462 - 4469   2000.12

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    Binary diffusion coefficients, D-12, and partition ratios, k, for the poly(ethylene glycol) (PEG) layer to supercritical carbon dioxide for acetone and some solid solutes such as phenol, alpha -tocopherol, and beta -carotene were measured with a PEG-coated capillary column by a tracer response technique. The D-12 values for acetone with the PEG-coated column were consistent with those measured by the Taylor dispersion method in which an uncoated capillary column was employed. The D-12 and k values for all of the solutes decrease simply with increasing pressure, and the D-12 values were represented by the Schmidt number correlation.

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  • Infinite-dilution binary diffusion coefficients of 2-propanone, 2-butanone, 2-pentanone, and 3-pentanone in CO2 by the Taylor dispersion technique from 308.15 to 328.15 K in the pressure range from 8 to 35 MPa

    T. Funazukuri, C. Y. Kong, S. Kagei

    International Journal of Thermophysics   21 ( 6 )   1279 - 1290   2000.11

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    Infinite-dilution binary diffusion coefficients of 2-propanone, 2-butanone, 2-pentanone, and 3-pentanone in carbon dioxide were measured by the Taylor dispersion method at temperatures from 308.15 to 328.15 K and pressures from 7.60 to 34.57 MPa. The D12 values were obtained from the response curves by the method of fitting in the time domain. The accuracy in the fitting error was examined for each measurement. The measured D12 data were found to be well correlated by the Schmidt number correlation, with AAD% = 3.74% for all solutes.

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  • Infinite-dilution binary diffusion coefficients of 2-propanone, 2-butanone, 2-pentanone, and 3-pentanone in CO2 by the Taylor dispersion technique from 308.15 to 328.15 K in the pressure range from 8 to 35 MPa

    T. Funazukuri, C. Y. Kong, S. Kagei

    International Journal of Thermophysics   21 ( 6 )   1279 - 1290   2000.11

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    Infinite-dilution binary diffusion coefficients of 2-propanone, 2-butanone, 2-pentanone, and 3-pentanone in carbon dioxide were measured by the Taylor dispersion method at temperatures from 308.15 to 328.15 K and pressures from 7.60 to 34.57 MPa. The D12 values were obtained from the response curves by the method of fitting in the time domain. The accuracy in the fitting error was examined for each measurement. The measured D12 data were found to be well correlated by the Schmidt number correlation, with AAD% = 3.74% for all solutes.

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  • The effects of additives on hydrolysis of cellulose with water

    T.Funazukuri, M.Hirota, T.Nagatake, M.Goto

    Bioseparation Engineering,edited by I.Endo,T.Nagamune,S.Kato and T.Yonemoto,Elsevier(2000)   181 - 185   2000.6

  • Binary diffusion coefficients of acetone in carbon dioxide at 308.2 and 313.2 K in the pressure range from 7.9 to 40 MPa

    T. Funazukuri, C. Y. Kong, S. Kagei

    International Journal of Thermophysics   21 ( 3 )   651 - 669   2000.5

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    Binary diffusion coefficients of acetone in carbon dioxide were measured by the Taylor dispersion method at 308.2 K and 7.9 to 40 MPa and at 313.2 K and 8.0 to 37 MPa. The D12 values obtained from the response curves by the method of fitting in the time domain were more accurate than those obtained by the moment method. At pressures lower than about 8.3 MPa at 308.2 K or 9.1 MPa at 313.2 K, the accuracy in the D12 values was found to decrease significantly with decreasing pressure by examining (peak area) × ua,cal, the values of S10, the fitting error ε, and ua,cal/ua,exp as a function of pressure. The D12 values at pressures higher than 8.3 MPa at 308.2 K or 9.1 MPa at 313.2 K were well represented with the Schmidt number correlation. The D12 data with larger fitting errors (ε &gt
    0.01) showed larger deviations from the values predicted by this correlation.

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  • Binary diffusion coefficients of acetone in carbon dioxide at 308.2 and 313.2 K in the pressure range from 7.9 to 40 MPa

    T. Funazukuri, C. Y. Kong, S. Kagei

    International Journal of Thermophysics   21 ( 3 )   651 - 669   2000.5

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    Binary diffusion coefficients of acetone in carbon dioxide were measured by the Taylor dispersion method at 308.2 K and 7.9 to 40 MPa and at 313.2 K and 8.0 to 37 MPa. The D12 values obtained from the response curves by the method of fitting in the time domain were more accurate than those obtained by the moment method. At pressures lower than about 8.3 MPa at 308.2 K or 9.1 MPa at 313.2 K, the accuracy in the D12 values was found to decrease significantly with decreasing pressure by examining (peak area) × ua,cal, the values of S10, the fitting error ε, and ua,cal/ua,exp as a function of pressure. The D12 values at pressures higher than 8.3 MPa at 308.2 K or 9.1 MPa at 313.2 K were well represented with the Schmidt number correlation. The D12 data with larger fitting errors (ε &gt
    0.01) showed larger deviations from the values predicted by this correlation.

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  • Rates of weight loss for lignocellulosic materials subjected to supercritical fluid/mixtures

    T Funazukuri

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN   33 ( 2 )   292 - 296   2000.4

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    This article studies the effects of various supercritical fluids on the weight losses of lignocellulosic materials with the data reported by Li and Kiran (1988). It is found that the solvent effect on the weight losses is of less importance than the thermal degradation reactions In the absence of water. In the presence of water at about 190 degrees C and 29 MPa, the reaction order is 0.5 with respect to water mole fraction.

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  • On the measurement of anomalous binary diffusion coefficients in the near-critical region

    T Funazukuri, CY Kong, S Kagei

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   39 ( 3 )   835 - 837   2000.3

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    The anomaly in binary diffusion coefficients has been reported by Nishiumi and co-workers in the near-critical region of pure CO2 solvent with the Taylor dispersion technique when the relatively large amount of solute as a tracer was injected. We have demonstrated that the mixture of the solute and CO2 solvent does not attain to the supercritical state at most axial positions of the diffusion column under their measurement conditions showing the anomaly.

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  • 水の亜臨界・超臨界条件下における2-アミノエタノールの酸化分解、超臨界流体プロセスの実用化

    船造俊孝

    41 - 45   2000.1

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  • On the measurement of anomalous binary diffusion coefficients in the near-critical region

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    Industrial and Engineering Chemistry Research   39 ( 3 )   835 - 837   2000

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    The anomaly in binary diffusion coefficients in the near-critical region of pure CO2 solvent with the Taylor dispersion technique when the relatively large amount of solute as a tracer was injected is examined. Results show that the mixture of the solute and CO2 solvent does not attain to the supercritical state at most axial positions of the diffusion column under their measurement conditions showing the anomaly.

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  • The effects of additives on hydrolysis of cellulose with water under pressures

    T. Funazukuri, M. Hirota, T. Nagatake, M. Goto

    Progress in Biotechnology   16 ( C )   181 - 185   2000

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    The effects of additives on hydrolysis rate and glucose yield were studied with bomb-type small batch reactors in hydrolysis of cellulosic samples under pressures in the temperature range from 250°C to 380°C. Although the rates were significantly enhanced by acidic additives (H2SO4, CH3COOH), the glucose yields were not. The yields with water were higher than those with water+additives. © 2000 Elsevier B.V. All rights reserved.

    DOI: 10.1016/S0921-0423(00)80033-7

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  • On the measurement of anomalous binary diffusion coefficients in the near-critical region

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    Industrial and Engineering Chemistry Research   39 ( 3 )   835 - 837   2000

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    The anomaly in binary diffusion coefficients in the near-critical region of pure CO2 solvent with the Taylor dispersion technique when the relatively large amount of solute as a tracer was injected is examined. Results show that the mixture of the solute and CO2 solvent does not attain to the supercritical state at most axial positions of the diffusion column under their measurement conditions showing the anomaly.

    DOI: 10.1021/ie990275r

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  • On the measurement of anomalous binary diffusion coefficients in the near-critical region

    Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    Industrial and Engineering Chemistry Research   39 ( 3 )   835 - 837   2000

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    The anomaly in binary diffusion coefficients in the near-critical region of pure CO2 solvent with the Taylor dispersion technique when the relatively large amount of solute as a tracer was injected is examined. Results show that the mixture of the solute and CO2 solvent does not attain to the supercritical state at most axial positions of the diffusion column under their measurement conditions showing the anomaly.

    DOI: 10.1021/ie990275r

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  • Rates of weight loss for lignocellulosic materials subjected to supercritical fluid/mixtures

    Toshitaka Funazukuri

    Journal of Chemical Engineering of Japan   33 ( 2 )   292 - 296   2000

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    This article studies the effects of various supercritical fluids on the weight losses of lignocellulosic materials with the data reported by Li and Kiran (1988). It is found that the solvent effect on the weight losses is of less importance than the thermal degradation reactions in the absence of water. In the presence of water at about 190°C and 29 MPa, the reaction order is 0.5 with respect to water mole fraction.

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  • Diffusion coefficients of linoleic acid methyl ester, Vitamin K3 and indole in mixtures of carbon dioxide and n-hexane at 313.2 K, and 16.0 MPa and 25.0 MPa

    Toshitaka Funazukuri, Yoshihisa Ishiwata

    Fluid Phase Equilibria   164 ( 1 )   117 - 129   1999.10

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    Diffusion coefficients of linoleic acid methyl ester, Vitamin K3 and indole in mixtures of carbon dioxide and n-hexane were measured at 313.2 K, and 16.0 and 25.0 MPa by using the Taylor dispersion method. It was found that the measured diffusion coefficients D(1m) were well correlated by the Blanc's equation: (D(1m) = 1 over x2/D12 + x3/D13) where x2 and x3 are mole fractions of CO2 and n-hexane, and D12 and D13 are binary diffusion coefficients of the solutes in CO2 and n-hexane, respectively, measured at the same temperature and pressure. Other equations for D(1m), as a function of temperature and solvent viscosity, were tested as a possible correlating equation.

    DOI: 10.1016/S0378-3812(99)00240-X

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  • Diffusion coefficients of linoleic acid methyl ester, Vitamin K3 and indole in mixtures of carbon dioxide and n-hexane at 313.2 K, and 16.0 MPa and 25.0 MPa

    Toshitaka Funazukuri, Yoshihisa Ishiwata

    Fluid Phase Equilibria   164 ( 1 )   117 - 129   1999.10

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    Diffusion coefficients of linoleic acid methyl ester, Vitamin K3 and indole in mixtures of carbon dioxide and n-hexane were measured at 313.2 K, and 16.0 and 25.0 MPa by using the Taylor dispersion method. It was found that the measured diffusion coefficients D(1m) were well correlated by the Blanc's equation: (D(1m) = 1 over x2/D12 + x3/D13) where x2 and x3 are mole fractions of CO2 and n-hexane, and D12 and D13 are binary diffusion coefficients of the solutes in CO2 and n-hexane, respectively, measured at the same temperature and pressure. Other equations for D(1m), as a function of temperature and solvent viscosity, were tested as a possible correlating equation.

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  • Decomposition of 2-aminoethanol in sub- and supercritical water with without hydrogen peroxide

    T Funazukuri, M Takahashi

    FUEL   78 ( 9 )   1117 - 1119   1999.7

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    2-Aminoethanol was decomposed in sub- and supercritical water, with/without hydrogen peroxide. The conversion of total organic carbon (TOC) and the yields of ammonia and carbon dioxide were found to be enhanced under supercritical conditions of water, when compared with those under subcritical conditions. The yield of ammonia was found to be correlated with yield of carbon dioxide, nearly, irrespective of the presence of hydrogen peroxide, while conversions of 2-aminoethanol and TOC were significantly affected by adding hydrogen peroxide. (C) 1999 Elsevier Science Ltd. All rights reserved.

    DOI: 10.1016/S0016-2361(99)00026-5

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  • Decomposition of 2-aminoethanol in sub- and supercritical water with without hydrogen peroxide

    T Funazukuri, M Takahashi

    FUEL   78 ( 9 )   1117 - 1119   1999.7

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    2-Aminoethanol was decomposed in sub- and supercritical water, with/without hydrogen peroxide. The conversion of total organic carbon (TOC) and the yields of ammonia and carbon dioxide were found to be enhanced under supercritical conditions of water, when compared with those under subcritical conditions. The yield of ammonia was found to be correlated with yield of carbon dioxide, nearly, irrespective of the presence of hydrogen peroxide, while conversions of 2-aminoethanol and TOC were significantly affected by adding hydrogen peroxide. (C) 1999 Elsevier Science Ltd. All rights reserved.

    DOI: 10.1016/S0016-2361(99)00026-5

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  • 亜臨界・超臨界処理技術と廃棄物処理への応用例

    船造俊孝

    高効率再生可能資源の創製並びにバイオコンバージョン技術に関する調査   228 - 242   1999.3

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  • Infinite dilution binary diffusion coefficients of C-5-monoalcohols in water in the temperature range from 273.2 K to 353.2 K at 0.1 MPa

    T Funazukuri, M Nishio

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   44 ( 1 )   73 - 76   1999.1

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    Infinite dilution binary diffusion coefficients of C-5-monoalcohols in water were measured by the Taylor dispersion method at 273.2 K to 353.2 K and 0.1 MPa. At each temperature it was found that the D-12 values for the isomers increase with the boiling point of the pure alcohols. The D-12 values were correlated with temperature, water viscosity, and solute boiling point. The accuracy in the correlation was superior to the various correlations reported in the literature.

    DOI: 10.1021/je9801765

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  • Infinite dilution binary diffusion coefficients of C-5-monoalcohols in water in the temperature range from 273.2 K to 353.2 K at 0.1 MPa

    T Funazukuri, M Nishio

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   44 ( 1 )   73 - 76   1999.1

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    Infinite dilution binary diffusion coefficients of C-5-monoalcohols in water were measured by the Taylor dispersion method at 273.2 K to 353.2 K and 0.1 MPa. At each temperature it was found that the D-12 values for the isomers increase with the boiling point of the pure alcohols. The D-12 values were correlated with temperature, water viscosity, and solute boiling point. The accuracy in the correlation was superior to the various correlations reported in the literature.

    DOI: 10.1021/je9801765

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  • Effective axial dispersion coefficients in packed beds under supercritical conditions

    Toshitaka Funazukuri, Changyi Kong, Seiichiro Kagei

    Journal of Supercritical Fluids   13 ( 1-3 )   169 - 175   1998.6

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    Effective axial dispersion coefficients Dax in packed beds were measured by the chromatographic method at 313.2 K both for supercritical CO2 in the pressure range from 11 to 35 MPa and for organic solvents at atmospheric pressure. The Dax values were correlated with the Reynolds number, Schmidt number, binary diffusivity and bed void fraction. The correlation was consistent for all solvents, irrespective of pressure. © 1998 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0896-8446(98)00049-7

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  • Effective axial dispersion coefficients in packed beds under supercritical conditions

    Toshitaka Funazukuri, Changyi Kong, Seiichiro Kagei

    Journal of Supercritical Fluids   13 ( 1-3 )   169 - 175   1998.6

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    Effective axial dispersion coefficients Dax in packed beds were measured by the chromatographic method at 313.2 K both for supercritical CO2 in the pressure range from 11 to 35 MPa and for organic solvents at atmospheric pressure. The Dax values were correlated with the Reynolds number, Schmidt number, binary diffusivity and bed void fraction. The correlation was consistent for all solvents, irrespective of pressure. © 1998 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0896-8446(98)00049-7

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  • 溶質─溶媒間相互作用を考慮した超臨界溶媒中における物質移動過程の解明

    船造俊孝

    平成8年度─平成9年度文部省科学研究費補助金基盤研究(C)(2)研究成果報告書   1998.3

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  • バイオマス系廃棄物についてのゼロエミッションプロセスの構築

    船造俊孝

    文部省科学研究費・重点領域研究最終報告会(於:大分)   1998.1

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  • Rate of dibenzyl ether decomposition in supercritical water

    T Funazukuri, RM Serikawa, K Yamaura

    FUEL   76 ( 9 )   865 - 870   1997.7

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    Dibenzyl ether was decomposed in a batch bomb-type reactor both in supercritical water at 663-688 K and water density 387 kg m(-3) and in liquid water at 553-583 K and saturated vapour pressure. The reaction pathways were assumed to consist of pyrolysis, hydrolysis and decomposition of the major products, and their rates were determined. The pyrolysis rates are substantially consistent with published data for various atmospheres. The activation energies of the pyrolysis and hydrolysis pathways are 120 and 112 kJ mol(-1) respectively. (C) 1997 Elsevier Science Ltd.

    DOI: 10.1016/S0016-2361(97)00055-0

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  • Rate of dibenzyl ether decomposition in supercritical water

    T Funazukuri, RM Serikawa, K Yamaura

    FUEL   76 ( 9 )   865 - 870   1997.7

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    Dibenzyl ether was decomposed in a batch bomb-type reactor both in supercritical water at 663-688 K and water density 387 kg m(-3) and in liquid water at 553-583 K and saturated vapour pressure. The reaction pathways were assumed to consist of pyrolysis, hydrolysis and decomposition of the major products, and their rates were determined. The pyrolysis rates are substantially consistent with published data for various atmospheres. The activation energies of the pyrolysis and hydrolysis pathways are 120 and 112 kJ mol(-1) respectively. (C) 1997 Elsevier Science Ltd.

    DOI: 10.1016/S0016-2361(97)00055-0

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  • FTIR spectra of acetone in sub-and supercritical CO2 in the near-critical region

    T. Funazukuri, C.Y. Kong, S. Kagei

    Proc. of the 4th Int. Symp. on Supercritical Fluids   671 - 674   1997.5

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  • Effective axial dispersion coefficients in packed beds under supercritical conditions

    T. Funazukuri, Y. Ikushima

    Proc. of the 4th Int. Symp. on Supercritical Fluids   5 - 8   1997.5

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  • FTIR spectra of acetone in sub-and supercritical CO2 in the near-critical region

    T. Funazukuri, C.Y. Kong, S. Kagei

    Proc. of the 4th Int. Symp. on Supercritical Fluids   671 - 674   1997.5

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  • Effective axial dispersion coefficients in packed beds under supercritical conditions

    T. Funazukuri, Y. Ikushima

    Proc. of the 4th Int. Symp. on Supercritical Fluids   5 - 8   1997.5

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  • 0.1MPa における水中でのエタノールおよび二酸化炭素の無限希釈相互拡散係数の測定

    船造俊孝, 西尾匡弘

    化学工学論文集   23 ( 1 )   67 - 73   1997.1

  • Tracer diffusion coefficients of benzene in dense CO, at 313.2 K and 8.5-30 MPa

    T Funazukuri, N Nishimoto

    FLUID PHASE EQUILIBRIA   125 ( 1-2 )   235 - 243   1996.10

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    Binary diffusion coefficients D-12 of benzene at infinite dilution in carbon dioxide were measured at 313.2 K in the pressure range from 8.5 to 30 MPa by the Taylor dispersion method. At 313.2 K, the measured values in this study were slightly higher than those of Swaid and Schneider, 1979, and lower than those of Sassiat et al., 1987. It was found that the D-12 values measured with the coiled diffusion column installed vertically were lower than those when it was installed horizontally. The correlation of D-12 with solvent viscosity was effective for the D-12 of benzene, both in dense CO2 and in the liquid solvents: hexane, cyclohexane and dodecane. In addition, the measured D-12 decreased smoothly with increasing pressure, and there was no evidence of the anomalous decrease in D-12 at 313.2 K in the pressure range from 8.5 to 30 MPa.

    DOI: 10.1016/S0378-3812(96)03084-1

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  • Tracer diffusion coefficients of benzene in dense CO, at 313.2 K and 8.5-30 MPa

    T Funazukuri, N Nishimoto

    FLUID PHASE EQUILIBRIA   125 ( 1-2 )   235 - 243   1996.10

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    Binary diffusion coefficients D-12 of benzene at infinite dilution in carbon dioxide were measured at 313.2 K in the pressure range from 8.5 to 30 MPa by the Taylor dispersion method. At 313.2 K, the measured values in this study were slightly higher than those of Swaid and Schneider, 1979, and lower than those of Sassiat et al., 1987. It was found that the D-12 values measured with the coiled diffusion column installed vertically were lower than those when it was installed horizontally. The correlation of D-12 with solvent viscosity was effective for the D-12 of benzene, both in dense CO2 and in the liquid solvents: hexane, cyclohexane and dodecane. In addition, the measured D-12 decreased smoothly with increasing pressure, and there was no evidence of the anomalous decrease in D-12 at 313.2 K in the pressure range from 8.5 to 30 MPa.

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  • Measurements of binary diffusion coefficients of 20 organic compounds in CO2 at 313.2K and 16.0 MPA

    T Funazukuri

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN   29 ( 1 )   191 - 192   1996.2

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    DOI: 10.1252/jcej.29.191

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  • Measurements of binary diffusion coefficients of 20 organic compounds in CO2 at 313.2K and 16.0MPa Reviewed

    T.Funazukuri

    J. Chem. Eng. Japan   29 ( 1 )   191 - 192   1996.2

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    DOI: 10.1252/jcej.29.191

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  • 超臨界流体中の有機化合物の相互拡散係数

    船造俊孝

    高圧力の科学と技術   5 ( 1 )   34 - 41   1996.1

  • Tracer diffusion coefficients of benzene in dense CO2 at 313.2K and 8.5 to 30MPa

    T.Funazukuri, N.Nishimoto

    Proc. of 4th Asian Thermophys. Properties Conf.   691 - 694   1995.9

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  • Tracer Diffusion Coefficients of Benzene in Dense CO_2 at 313.2K and 8.5 to 30 MPa

    FUNAZUKURI T.

    Proc of the 4th Asian Thermophys. Prop. Conf.   691 - 694   1995.9

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  • 回分反応器によるクラフトパルプの過酸化水素漂白

    船造俊孝, 高橋弘真, 宮島健, 若尾法昭

    化学工学論文集   21 ( 5 )   866 - 870   1995.9

  • 水および電解質水溶液中における二酸化炭素の拡散係数の推算 Reviewed

    船造俊孝, 西尾匡弘

    化学工学論文集   21 ( 4 )   824 - 828   1995.7

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    An empirical correlation given by<BR>D12/T=1.013×10-14η-0.9222<BR>is proposed for predicting binary/pseudo binary diffusion coefficients of carbon dioxide in water and in aqueous electrolytic solutions, where D12 is diffusion coefficient [m2/s], T is temperature [K], and ηis viscosity [Pa s].The average absolute deviation AAD for this correlation is 5.6% for the literature data on D12 of CO2 in water with number of data points N of 79 and 3.9% (N=103) for those in aqueous electrolytic solutions. The above correlation obtained in this study is more accurate than the various empirical correlations proposed in the literature.

    DOI: 10.1252/kakoronbunshu.21.824

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  • 高密度二酸化炭素中における有機化合物の相互拡散係数へのRough Hard Sphere モデルの適用

    船造俊孝, 若尾法昭

    化学工学論文集   21 ( 1 )   204 - 211   1995.1

  • Measurements and Prediction of Binary Diffusion Coefficients of Organic Compounds in Dense and Liquid Fluids

    FUNAZUKURI T.

    Proc. of the 3rd Int. Conf. of Supercrit. Fluids   29 - 33   1994.10

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  • Measurements and prediction of binary diffusion coefficients of organic compounds in dense and liquid fluids

    T.Funazukuri, N.Nishimoto, N.Wakao

    Proc. of 3rd Int. Symp. Of Super-critical Fluids   29 - 33   1994.10

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  • BINARY DIFFUSION-COEFFICIENTS OF ORGANIC-COMPOUNDS IN HEXANE, DODECANE, AND CYCLOHEXANE AT 303.2-333.2-K AND 16.0 MPA

    T FUNAZUKURI, NISHIMOTON, N WAKAO

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   39 ( 4 )   911 - 915   1994.10

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    Binary diffusion coefficients for infinitely dilute solutions of acetone, benzene, toluene, m-xylene, 1,3,5-trimethylbenzene, and naphthalene in hexane, in dodecane, and in cyclohexane were measured from 303.2 to 333.2 K and at 16.0 MPa using the Taylor dispersion technique. In addition, the measurements for o- and p-xylenes, vitamin K3, linoleic acid methyl ester, indole, dl-limonene, vitamin A acetate, vitamin E, and vitamin K1 in hexane and vitamin K3 and linoleic acid methyl ester in dodecane were made at the limited conditions. The D12 results in the three solvents are expressed by the equation D12/T = alphaeta(beta) with average absolute deviation of 5.2%, where eta is the solvent viscosity and alpha and beta are constants related to the solute molar volume at the normal boiling point. For the D12 measured in this study this correlation is as accurate as Nakanishi's correlation which is superior to other correlations examined.

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  • BINARY DIFFUSION-COEFFICIENTS OF ORGANIC-COMPOUNDS IN HEXANE, DODECANE, AND CYCLOHEXANE AT 303.2-333.2-K AND 16.0 MPA

    T FUNAZUKURI, NISHIMOTON, N WAKAO

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   39 ( 4 )   911 - 915   1994.10

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    Binary diffusion coefficients for infinitely dilute solutions of acetone, benzene, toluene, m-xylene, 1,3,5-trimethylbenzene, and naphthalene in hexane, in dodecane, and in cyclohexane were measured from 303.2 to 333.2 K and at 16.0 MPa using the Taylor dispersion technique. In addition, the measurements for o- and p-xylenes, vitamin K3, linoleic acid methyl ester, indole, dl-limonene, vitamin A acetate, vitamin E, and vitamin K1 in hexane and vitamin K3 and linoleic acid methyl ester in dodecane were made at the limited conditions. The D12 results in the three solvents are expressed by the equation D12/T = alphaeta(beta) with average absolute deviation of 5.2%, where eta is the solvent viscosity and alpha and beta are constants related to the solute molar volume at the normal boiling point. For the D12 measured in this study this correlation is as accurate as Nakanishi's correlation which is superior to other correlations examined.

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  • クラフトパルプの過酸化水素漂白速度の測定

    船造俊孝

    ケミカルエンジニアリング   39   21 - 26   1994.8

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  • 熱水および有機溶媒水溶液中におけるポリ塩化ビニルの脱塩素化速度

    船造俊孝, 望月巧, 荒川毎雄, 若尾法昭

    化学工学論文集   20 ( 4 )   579 - 582   1994.7

  • 16.0MPa における n-ヘキサン、 n-ドデカン、シクロヘキサン中の有機化合物の相互拡散係数の測定

    船造俊孝, 福田雄史, 西本典広, 若尾法昭

    化学工学論文集   19 ( 6 )   1157 - 1164   1993.11

  • トレーサー応答法を用いた高圧下での相互拡散係数の測定

    福田雄史, 西本典広, 船造俊孝, 若尾法昭

    超臨界流体の工学的利用と溶媒特性の分子論的解明(化学工学シンポジュムシリーズ)   35   107 - 112   1993.5

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  • 砂糖黍エタノール蒸留廃液(vinasse)の高圧下での油化における酸やアルカリ添加の影響

    芹川ロベルト正浩, 船造俊孝, 若尾法昭

    化学工学論文集   19 ( 3 )   544 - 548   1993.5

  • 高圧水蒸気雰囲気下でのジベンジルエーテルの分解反応の速度論的検討

    芹川ロベルト正浩, 船造俊孝, 若尾法昭

    超臨界流体の工学的利用と溶媒特性の分子論的解明(化学工学シンポジュムシリーズ)   35   15 - 20   1993.5

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  • Removal of colorants in vinasse with activated carbon Reviewed

    R.M.Serikawa, T.Funazukuri, N.Wakao

    Int. Sugar Journal   95 ( 1132E )   132 - 155   1993.4

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  • Removal of colorants in vinasse with activated carbon

    R.M.Serikawa, T.Funazukuri, N.Wakao

    Int. Sugar Journal   132 - 155   1993.4

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  • アルコール水溶液を用いたアカシア材の爆粋パルプ化

    船造俊孝, 堀一彦, 若尾法昭

    化学工学論文集   19 ( 2 )   245 - 250   1993.3

  • PREDICTIVE CORRELATION FOR BINARY DIFFUSION-COEFFICIENTS IN DENSE CARBON-DIOXIDE

    T FUNAZUKURI, Y ISHIWATA, N WAKAO

    AICHE JOURNAL   38 ( 11 )   1761 - 1768   1992.11

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    Binary diffusion coefficients of some organic compounds in carbon dioxide at 313.2 K and 16.0/25.0 MPa were measured by using the Taylor-Aris tracer response technique. We propose a new correlation of Schmidt numbers as a function of solvent molar volumes for predicting binary diffusion coefficients in dense CO2 and self-diffusion coefficients of dense CO2. The correlation was also found to be valid for predicting self-diffusion coefficients of dense CH4 at F(v)/A*&lt;40 or v2/(v2)0&gt;1.62.

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  • PREDICTIVE CORRELATION FOR BINARY DIFFUSION-COEFFICIENTS IN DENSE CARBON-DIOXIDE

    T FUNAZUKURI, Y ISHIWATA, N WAKAO

    AICHE JOURNAL   38 ( 11 )   1761 - 1768   1992.11

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    Binary diffusion coefficients of some organic compounds in carbon dioxide at 313.2 K and 16.0/25.0 MPa were measured by using the Taylor-Aris tracer response technique. We propose a new correlation of Schmidt numbers as a function of solvent molar volumes for predicting binary diffusion coefficients in dense CO2 and self-diffusion coefficients of dense CO2. The correlation was also found to be valid for predicting self-diffusion coefficients of dense CH4 at F(v)/A*&lt;40 or v2/(v2)0&gt;1.62.

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  • 木材爆砕に及ぼすエタノール添加の影響

    船造俊孝, 堀一彦, 清家康彦, 若尾法昭

    化学工学論文集   18 ( 5 )   769 - 772   1992.9

  • 超臨界水急速噴射による二酸化珪素非晶質微粒子の製造

    船造俊孝, 佐藤将裕, 萩野幸男, 若尾法昭

    化学工学論文集   18 ( 3 )   375 - 379   1992.5

  • OIL CONVERSION OF VINASSE WITH HIGH-DENSITY WATER

    RM SERIKAWA, T FUNAZUKURI, N WAKAO

    FUEL   71 ( 3 )   283 - 287   1992.3

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    Vinasse, residue from the ethanol distillation of alcohol-fermented sugar-cane juice, was treated with high-density water at temperatures from 200 to 500-degrees-C. The products were separated into ether soluble, ether/water insoluble and aqueous fractions, and char. The ether soluble and ether/water insoluble fractions were referred to as oil. At 350-degrees-C, for example, 15.8 wt% of dried vinasse turned into oil. The gaseous products were found to consist of mainly CO2 with a small amount of CO and CH4.

    DOI: 10.1016/0016-2361(92)90075-Y

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  • OIL CONVERSION OF VINASSE WITH HIGH-DENSITY WATER

    RM SERIKAWA, T FUNAZUKURI, N WAKAO

    FUEL   71 ( 3 )   283 - 287   1992.3

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    Vinasse, residue from the ethanol distillation of alcohol-fermented sugar-cane juice, was treated with high-density water at temperatures from 200 to 500-degrees-C. The products were separated into ether soluble, ether/water insoluble and aqueous fractions, and char. The ether soluble and ether/water insoluble fractions were referred to as oil. At 350-degrees-C, for example, 15.8 wt% of dried vinasse turned into oil. The gaseous products were found to consist of mainly CO2 with a small amount of CO and CH4.

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  • 超臨界/亜臨界水零囲気下でのGeO2と Pt との反応

    西川英一, 島田保昌, 船造俊孝, 若尾法昭

    化学工学論文集   17 ( 6 )   1229 - 1231   1991.11

  • Measurements of Binary Diffusion Coefficients of C16-C24 Unsaturated Fatty Acid Methyl Esters in Supercritical Carbon Dioxide

    Toshitaka Funazukuri, Sumito Hachisu, Noriaki Wakao

    Industrial and Engineering Chemistry Research   30 ( 6 )   1323 - 1329   1991.6

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    Binary diffusion coefficients were measured for C16-C24 unsaturated fatty acid methyl esters in supercritical carbon dioxide (at 313 K and 16.0 MPa) and linoleic acid methyl ester in supercritical carbon dioxide (at 308-328 K and 14.0-33.6 MPa). We propose an empirical equation that correlates the diffusion coefficients in terms of Schmidt numbers, (Sc - Sc*)/Sc*, with molar volumes, (v2 - (v2)0) / (v2)0 where Sc and Sc* are Schmidt numbers at the prescribed pressure and at atmospheric pressure, respectively, and where v2 and (v2)0 are molar volumes at the prescribed pressure and at which viscous flow ceases, respectively. Also, it was found that CO2 self-diffusion coefficient values recommended by Chen (1983) were well correlated by this equation. © 1991, American Chemical Society. All rights reserved.

    DOI: 10.1021/ie00054a038

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  • Measurements of Binary Diffusion Coefficients of C16-C24 Unsaturated Fatty Acid Methyl Esters in Supercritical Carbon Dioxide

    Toshitaka Funazukuri, Sumito Hachisu, Noriaki Wakao

    Industrial and Engineering Chemistry Research   30 ( 6 )   1323 - 1329   1991.6

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    Binary diffusion coefficients were measured for C16-C24 unsaturated fatty acid methyl esters in supercritical carbon dioxide (at 313 K and 16.0 MPa) and linoleic acid methyl ester in supercritical carbon dioxide (at 308-328 K and 14.0-33.6 MPa). We propose an empirical equation that correlates the diffusion coefficients in terms of Schmidt numbers, (Sc - Sc*)/Sc*, with molar volumes, (v2 - (v2)0) / (v2)0 where Sc and Sc* are Schmidt numbers at the prescribed pressure and at atmospheric pressure, respectively, and where v2 and (v2)0 are molar volumes at the prescribed pressure and at which viscous flow ceases, respectively. Also, it was found that CO2 self-diffusion coefficient values recommended by Chen (1983) were well correlated by this equation. © 1991, American Chemical Society. All rights reserved.

    DOI: 10.1021/ie00054a038

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  • Delignification of Acacia mollissima Willd in steam explosion -- Effect of adding ethylene glycol on oil produced

    T.Funazukuri, T.Atsugi, N.Wakao

    J. Chem. Eng. Japan   24 ( 3 )   397 - 399   1991.6

  • Molecular diffusion coefficients of Vitamin K3 in mixtures of CO2 and n-hexane at temperature of 313.2K and total pressure of 16.0 Mpa

    T.Funazukuri, Y.Ishiwata, N.Wakao

    J. Chem. Eng. Japan   387 - 388   1991.6

  • Molecular diffusion coefficients of Vitamin K3 in mixtures of CO2 and n-hexane at temperature of 313.2K and total pressure of 16.0 Mpa

    T.Funazukuri, Y.Ishiwata, N.Wakao

    J. Chem. Eng. Japan   24 ( 3 )   387 - 388   1991.6

  • Delignification of Acacia mollissima Willd in steam explosion -- Effect of adding ethylene glycol on oil produced

    T.Funazukuri, T.Atsugi, N.Wakao

    J. Chem. Eng. Japan   397 - 399   1991.6

  • Measurements of binary diffusion coefficients of organic compounds in supercritical carbon dioxide by a tracer response technique

    T.Funazukuri, N.Wakao

    Proc. of 2nd Int. Symp. Of Super-critical Fluids   25 - 28   1991.5

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  • Measurements of binary diffusion coefficients of organic compounds in supercritical carbon dioxide by a tracer response technique

    T.Funazukuri, N.Wakao

    Proc. of 2nd Int. Symp. Of Super-critical Fluids   25 - 28   1991.5

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  • EFFECT OF ADDING NA2CO3, HCL AND OR CO DURING LIQUEFACTION OF LIGNIN SULFONATE WITH WATER

    T FUNAZUKURI, JS CHO, N WAKAO

    FUEL   69 ( 10 )   1328 - 1329   1990.10

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    DOI: 10.1016/0016-2361(90)90298-5

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  • EFFECT OF ADDING NA2CO3, HCL AND OR CO DURING LIQUEFACTION OF LIGNIN SULFONATE WITH WATER

    T FUNAZUKURI, JS CHO, N WAKAO

    FUEL   69 ( 10 )   1328 - 1329   1990.10

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    DOI: 10.1016/0016-2361(90)90298-5

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  • Liquefaction of lignin sulphonate with water under subcritical and supercritical water

    T.Funazukuri, N.Wakao, J.M.Smith

    Fuel   69 ( 3 )   349 - 353   1990.3

  • Liquefaction of lignin sulphonate with water under subcritical and supercritical water

    T.Funazukuri, N.Wakao, J.M.Smith

    Fuel   349 - 353   1990.3

  • 回分槽によるフミン酸の活性炭吸着 Reviewed

    若尾法昭, 池田憲治, 船造俊孝

    水道協会雑誌   58 ( 12 )   16 - 20   1989.12

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  • Oil extraction from Australian Condor oil shale with water -- Effects of adding toluene, Co and NaOH

    T.Funazukuri, T.Yamamoto, N.Wakao

    J. Chem. Eng. Japan   22 ( 5 )   527 - 531   1989.10

  • Oil extraction from Australian Condor oil shale with water -- Effects of adding toluene, Co and NaOH

    T.Funazukuri, T.Yamamoto, N.Wakao

    J. Chem. Eng. Japan   527 - 531   1989.10

  • Production of olefins from flash pyrolysis cellulose-containing material Reviewed

    T.Funazukuri, R.R.Hudgins, P.L.Silveston

    J. Anal. Appl.   17   47 - 66   1989.2

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    DOI: 10.1016/0165-2370(89)85005-3

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  • Production of olefins from flash pyrolysis cellulose-containing material

    T.Funazukuri, R.R.Hudgins, P.L.Silveston

    J. Anal. Appl.   47 - 66   1989.2

  • MEASUREMENT OF DIFFUSION-COEFFICIENTS OF C-18 UNSATURATED FATTY-ACID METHYL-ESTERS, NAPHTHALENE, AND BENZENE IN SUPERCRITICAL CARBON-DIOXIDE BY A TRACER RESPONSE TECHNIQUE

    T FUNAZUKURI, S HACHISU, N WAKAO

    ANALYTICAL CHEMISTRY   61 ( 2 )   118 - 122   1989.1

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    DOI: 10.1021/ac00177a008

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  • MEASUREMENT OF DIFFUSION-COEFFICIENTS OF C-18 UNSATURATED FATTY-ACID METHYL-ESTERS, NAPHTHALENE, AND BENZENE IN SUPERCRITICAL CARBON-DIOXIDE BY A TRACER RESPONSE TECHNIQUE

    T FUNAZUKURI, S HACHISU, N WAKAO

    ANALYTICAL CHEMISTRY   61 ( 2 )   118 - 122   1989.1

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    DOI: 10.1021/ac00177a008

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  • OIL EXTRACTION FROM AUSTRALIAN CONDOR OIL-SHALE WITH WATER AND CO IN THE PRESENCE OF NA2CO3

    T FUNAZUKURI, K MIZUTA, N WAKAO

    FUEL   67 ( 11 )   1510 - 1515   1988.11

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    DOI: 10.1016/0016-2361(88)90068-3

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  • OIL EXTRACTION FROM AUSTRALIAN CONDOR OIL-SHALE WITH WATER AND CO IN THE PRESENCE OF NA2CO3

    T FUNAZUKURI, K MIZUTA, N WAKAO

    FUEL   67 ( 11 )   1510 - 1515   1988.11

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    DOI: 10.1016/0016-2361(88)90068-3

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  • CHARACTERIZATION OF THE OIL EXTRACTED FROM CHINESE MAOMING OIL-SHALE

    T FUNAZUKURI, N WAKAO

    FUEL   67 ( 6 )   875 - 877   1988.6

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    DOI: 10.1016/0016-2361(88)90168-8

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  • CHARACTERIZATION OF THE OIL EXTRACTED FROM CHINESE MAOMING OIL-SHALE

    T FUNAZUKURI, N WAKAO

    FUEL   67 ( 6 )   875 - 877   1988.6

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    DOI: 10.1016/0016-2361(88)90168-8

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  • Product yield correlations for cellulose flash pyrolysis Reviewed

    T.Funazukuri, R.R.Hudgins, P.L.Silveston

    J. Anal. Appl. Pyrolysis   13   103 - 122   1988.5

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    DOI: 10.1016/0165-2370(88)80051-2

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  • Product yield correlations for cellulose flash pyrolysis

    T.Funazukuri, R.R.Hudgins, P.L.Silveston

    J. Anal. Appl. Pyrolysis   103 - 122   1988.5

  • SUPERCRITICAL FLUID EXTRACTION OF CHINESE MAOMING OIL-SHALE WITH WATER AND TOLUENE

    T FUNAZUKURI, S YOKOI, N WAKAO

    FUEL   67 ( 1 )   10 - 14   1988.1

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    DOI: 10.1016/0016-2361(88)90004-X

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  • 緑泥石から水中へのイオン溶出

    岩尾法昭, 宮本佳昭, 船造俊孝

    化学工学論文集   15 ( 1 )   191 - 193   1988.1

  • SUPERCRITICAL FLUID EXTRACTION OF CHINESE MAOMING OIL-SHALE WITH WATER AND TOLUENE

    T FUNAZUKURI, S YOKOI, N WAKAO

    FUEL   67 ( 1 )   10 - 14   1988.1

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    DOI: 10.1016/0016-2361(88)90004-X

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  • ACTIVATION-ENERGY OF HETEROGENEOUS CHEMICAL-REACTIONS UNDER EXTERNAL TRANSPORT CONTROL

    T FUNAZUKURI, PL SILVESTON, N WAKAO

    CHEMICAL ENGINEERING SCIENCE   43 ( 7 )   1713 - 1714   1988

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    Language:English   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    DOI: 10.1016/0009-2509(88)85165-0

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  • ACTIVATION-ENERGY OF HETEROGENEOUS CHEMICAL-REACTIONS UNDER EXTERNAL TRANSPORT CONTROL

    T FUNAZUKURI, PL SILVESTON, N WAKAO

    CHEMICAL ENGINEERING SCIENCE   43 ( 7 )   1713 - 1714   1988

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    DOI: 10.1016/0009-2509(88)85165-0

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  • Product distribution for flash pyrolysis of cellulose in a coil pyrolyzer Reviewed

    T.Funazukuri, R.R.Hudgins, P.L.Silveston

    J. Anal. Appl. Pyrolysis   10   225 - 249   1987.7

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    DOI: 10.1016/0165-2370(87)80005-0

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  • Product distribution for flash pyrolysis of cellulose in a coil pyrolyzer

    T.Funazukuri, R.R.Hudgins, P.L.Silveston

    J. Anal. Appl. Pyrolysis   225 - 249   1987.7

  • Supercritical extraction of used automotive tire with water

    T.Funazukuri, T.Takanashi, N.Wakao

    J. Chem. Eng. Japan   20 ( 1 )   23 - 27   1987.2

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  • Supercritical extraction of used automotive tire with water

    T.Funazukuri, T.Takanashi, N.Wakao

    J. Chem. Eng. Japan   23 - 27   1987.2

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  • Supercritical extraction of used automotive tire

    T.Funazukuri, S.Ogasawara, N.Wakao

    Proc. of World Congress III of Chem. Eng.   805 - 808   1986.9

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  • Supercritical extraction of used automotive tire

    T.Funazukuri, S.Ogasawara, N.Wakao

    Proc. of World Congress III of Chem. Eng.   805 - 808   1986.9

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  • 超臨界ガスによる廃タイヤ及びオイルシェールからの油抽出

    若尾法昭, 船造俊孝

    ケミカルエンジニアリング   31   61 - 66   1986.5

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  • Product distribution in pyrolysis of cellulose in a microfluidized bed

    T.Funazukuri, R.R.Hudgins, P.L.Silveston

    J. Anal. Appl. Pyrolysis   139 - 158   1986.5

  • Product distribution in pyrolysis of cellulose in a microfluidized bed Reviewed

    T.Funazukuri, R.R.Hudgins, P.L.Silveston

    J. Anal. Appl. Pyrolysis   9   139 - 158   1986.5

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    DOI: 10.1016/0165-2370(86)85004-5

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  • 水の超臨界ガスを用いた廃タイヤからの油抽出

    高梨哲也, 玉島均, 青野直利, 船造俊孝

    超臨界ガス抽出(化学工学シンポジュムシリーズ)   11   55 - 58   1986.3

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  • 超臨界ガスを用いたオイルシェールからの油抽出

    高梨哲也, 横井誠司, 船造俊孝

    超臨界ガス抽出(化学工学シンポジュムシリーズ)   11   51 - 54   1986.3

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  • Correlation of Volatile Products from Fast Cellulose Pyrolysis

    Toshltaka Funazukuri, Robert R. Hudgins, Peter L. Sllveston

    Industrial and Engineering Chemistry Process Design and Development   25 ( 1 )   172 - 181   1986

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    The weight loss and the product yields from cellulose powder, cellulose particles, and filter paper were measured simultaneously under flash pyrolysis conditions. Products can be grouped into two distinct types. One is a CO behavior for which yields Increase with the weight loss and at weight loss above 40% also become a function of pyrolysis temperature. The second is a CO2 behavior for which yields are proportional to the weight loss and independent of pyrolysis temperature. Yields of both the CO behavior and CO2 behavior products correlate linearly in log-log plots with the CO yields and with CO2yields, respectively. Because CO yields correlate well with the weight loss and pyrolysis temperature, major gaseous and liquid products obtained from flash pyrolysis of cellulose powder or particles can be predicted accurately. Variables such as heating rate, particle size, and pyrolysis temperature do not affect the relationships. © 1986, American Chemical Society. All rights reserved.

    DOI: 10.1021/i200032a027

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  • Correlation of Volatile Products from Fast Cellulose Pyrolysis

    Toshltaka Funazukuri, Robert R. Hudgins, Peter L. Sllveston

    Industrial and Engineering Chemistry Process Design and Development   25 ( 1 )   172 - 181   1986

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    The weight loss and the product yields from cellulose powder, cellulose particles, and filter paper were measured simultaneously under flash pyrolysis conditions. Products can be grouped into two distinct types. One is a CO behavior for which yields Increase with the weight loss and at weight loss above 40% also become a function of pyrolysis temperature. The second is a CO2 behavior for which yields are proportional to the weight loss and independent of pyrolysis temperature. Yields of both the CO behavior and CO2 behavior products correlate linearly in log-log plots with the CO yields and with CO2yields, respectively. Because CO yields correlate well with the weight loss and pyrolysis temperature, major gaseous and liquid products obtained from flash pyrolysis of cellulose powder or particles can be predicted accurately. Variables such as heating rate, particle size, and pyrolysis temperature do not affect the relationships. © 1986, American Chemical Society. All rights reserved.

    DOI: 10.1021/i200032a027

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  • Subcritical and supercritical extraction of oil from used automotive tire samples

    T.Funazukuri, S.Ogasawara, N.Wakao

    J. Chem. Eng. Japan   455 - 460   1985.10

  • SUBCRITICAL AND SUPERCRITICAL EXTRACTION OF OIL FROM USED AUTOMOTIVE TIRE SAMPLES

    T FUNAZUKURI, S OGASAWARA, N WAKAO, JM SMITH

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN   18 ( 5 )   455 - 460   1985

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    Language:English   Publisher:SOC CHEMICAL ENG JAPAN  

    DOI: 10.1252/jcej.18.455

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  • Prediction of volatile products from thermal conversion of cellulose by correlation with carbon oxides in the gas Reviewed

    T.Funazukuri, R.R.Hudgins, P.L.Silveston

    IGB Energy from Biomass and Wastes   8   589 - 636   1984.1

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  • Prediction of volatile products from thermal conversion of cellulose by correlation with carbon oxides in the gas

    T.Funazukuri, R.R.Hudgins, P.L.Silveston

    IGB Energy from Biomass and Wastes   589 - 636   1984.1

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  • Effect of fluid dispersion coefficients on particle-to-fluid heat transfer coefficients in packed Reviewed

    N.Wakao, S.Kaguei, T.Funazukuri

    Chemical Engineering Science   34 ( 3 )   325 - 336   1979.3

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    Language:English   Publisher:Pergamon Press Ltd.  

    DOI: 10.1016/0009-2509(79)85064-2

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  • Effect of fluid dispersion coefficients on particle-to-fluid heat transfer coefficients in packed

    N.Wakao, S.Kaguei, T.Funazukuri

    Chem. Eng. Sci.   325 - 336   1979.3

  • Effect of fluid dispersion coefficients on particle-to-fluid mass transfer coefficients in packed beds--Correlation of Sherwood numbers Reviewed

    N.Wakao, T.Funazukuri

    Chemical Engineering Science   33 ( 10 )   1375 - 1384   1978.10

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    DOI: 10.1016/0009-2509(78)85120-3

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  • Effect of fluid dispersion coefficients on particle-to-fluid mass transfer coefficients in packed beds--Correlation of Sherwood numbers

    N.Wakao, T.Funazukuri

    Chem. Eng. Sci.   1375 - 1384   1978.10

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  • 高圧CO2+Methanol混合流体中でのPhenolの無限希釈拡散係数の測定

    小野寺 庸大, 坂部 淳一, 孔 昌一

    第50回化工秋季大会  2018.9 

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    栃木 勝己, 松田 弘幸, 栗原 清文, Rattan V. K

    第50回化工秋季大会  2018.9 

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    田中 隆大, 坂部 淳一

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    旗野 和揮, 坂部 淳一

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  • アミン添加熱水を用いた4-Fluoronitrobenzeneの脱フッ素化におよぼす反応条件の影響

    遠藤 純, 坂部 淳一

    第50回化工秋季大会  2018.9 

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  • Hydrothermal depolymerization of poly(butylene terephthalate) in aqueous dimethylamine solution

    Kazuki Hatano, Junichi Sakabe

    6th International Solvothermal and Hydrothermal Association Conference  2018.9 

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  • Effects of reaction conditions on yields and reaction rates in hydrothermal conversion of white wood

    Ryuta Tanaka, Junichi Sakabe

    6th International Solvothermal and Hydrothermal Association Conference (ISHA 2018)  2018.9 

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  • Amine as an attractive reagent for hydrothermal reactions

    6th International Solvothermal and Hydrothermal Association Conference (ISHA 2018)  2018.9 

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  • The infinite dilution partial molar volumes of lipids in supercritical CO2

    Chang Yi Kong, Okajima Idzumi, Sako Takesh

    8th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS 2018)  2018.9 

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  • Measurement of diffusion coefficients of vitamin K3 in mixture of CO2 and methanol over an entire range of methanol composition at 313.2 K up to 30 MPa

    Ryusei Suzuki, Junichi Sakabe, Chang Yi Kong

    8th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS 2018)  2018.9 

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  • Prediction of kinematic viscosities for ternary systems from binary data using McAllister equation

    Hiroyuki Matsuda, Katsumi Tochigi, Kiyofumi Kurihara, V. K. Rattan

    8th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS 2018)  2018.9 

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  • Prediction of kinematic viscosities for ternary aqueous systems using modified Eyring and activity coefficient models

    Katsumi Tochigi, Hiroyuki Matsuda, Kiyofumi Kurihara, V. K. Rattan

    8th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS 2018)  2018.9 

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  • Measurement of binary diffusion coefficient for Cr(acac)3 in high temperature region of supercritical carbon dioxide

    Minoru Yamamoto, Sakabe Junichi, Chang Yi Kong

    8th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS 2018)  2018.9 

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  • 超臨界流体クロマトグラフィーの基礎

    SFC研究会、夏の勉強会  2018.8 

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  • 超臨界流体クロマトグラフィー法を用いたキラル分離における保持因子のChrastil型の式による相関

    遠藤純, 小野寺庸大, 坂部淳一

    分離技術会年会2018  2018.5 

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  • 超臨界流体クロマトグラフィーによるtrans-Stilbene oxideの分離における共溶媒の影響

    小野寺庸大, 坂部淳一

    分離技術会年会2018  2018.5 

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  • 高温高圧下での希薄酸水溶液を用いたWhite woodの加水分解に及ぼす反応条件の影響

    田中隆大, 木村雄太, 坂部淳一

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  • 化学工学分野におけるスモールスケール実験の開発 II

    市之瀬理沙, 孫 雲龍, 片山 建二

    化学工学会83年会  2018.3 

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  • 熱水条件下のジメチルアミン水溶液によるpoly(butylene terephthalate)の解重合反応に及ぼす反応条件の影響

    旗野和揮, 木村雄太, 坂部淳一

    化学工学会第83年会  2018.3 

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  • 超臨界二酸化炭素中における溶質分子の相互拡散係数に対する溶質分子体積の影響

    坂部淳一

    化学工学会第83年会  2018.3 

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  • CIR法による超臨界二酸化炭素中におけるイブプロフェンの相互拡散係数の測定

    夏目晋吾, 坂部淳一, 孔 昌一

    化学工学会第83年会  2018.3 

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  • 超臨界流体クロマトグラフィによるtrans-Stilbene oxideの分離における共溶媒種の影響

    小野寺庸大, 坂部 淳一

    化学工学会第83年会  2018.3 

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  • 超臨界流体クロマトグラフィー法によるキラル分離における保持因子の温度圧力依存性

    遠藤純, 米澤宏誠, 坂部 淳一

    化学工学会第83年会  2018.3 

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  • 高圧下における二酸化炭素+溶剤系動粘度のWilson-VISCOによる相関

    栃木勝己, 松田弘幸, 栗原清文, ラターン ブイケー

    化学工学会第83年会  2018.3 

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  • 超臨界流体クロマトグラフィーによるtrans-Stilbene oxideの分離における共溶媒の影響

    分離技術会年会2018  2018 

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  • Hydrothermal depolymerization of poly(butylene terephthalate) in aqueous dimethylamine solution

    6th International Solvothermal and Hydrothermal Association Conference  2018 

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  • Effects of reaction conditions on yields and reaction rates in hydrothermal conversion of white wood

    6th International Solvothermal and Hydrothermal Association Conference (ISHA 2018)  2018 

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  • Amine as an attractive reagent for hydrothermal reactions

    6th International Solvothermal and Hydrothermal Association Conference (ISHA 2018)  2018 

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  • The infinite dilution partial molar volumes of lipids in supercritical CO2

    8th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS 2018)  2018 

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  • Measurement of diffusion coefficients of vitamin K3 in mixture of CO2 and methanol over an entire range of methanol composition at 313.2 K up to 30 MPa

    8th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS 2018)  2018 

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  • Prediction of kinematic viscosities for ternary systems from binary data using McAllister equation

    8th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS 2018)  2018 

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  • Prediction of kinematic viscosities for ternary aqueous systems using modified Eyring and activity coefficient models

    8th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS 2018)  2018 

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  • Measurement of binary diffusion coefficient for Cr(acac)3 in high temperature region of supercritical carbon dioxide

    8th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS 2018)  2018 

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  • Factors affecting retention factors in supercritical fluid chromatography

    SuperGreen 2017  2017.12 

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  • Taylor dispersion measurements for vitamin K3 in dense mixtures of CO2 and methanol

    Ryusei Suzuki, Junichi Sakabe, Chang Yi Kong

    SuperGreen 2017  2017.12 

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  • Measurements of molecular diffusion coefficients of ferrocene derivatives in supercritical carbon dioxide by chromatographic impulse response

    Yuki ohkubo, Junichi Sakabe, Chang Yi Kong

    SuperGreen 2017  2017.12 

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  • Measurement of diffusion coefficients of chromium (III) acetylacetonate in supercritical carbon dioxide at high temperatures

    Minoru Yamamoto, Junichi Sakabe, Minoru Taguchi

    AIChE Annual meeting 2017  2017.10 

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  • Adsorption Rate Constant and Equilibrium Constant in Chiral Separation for Trans-Stilbene Oxide, Linalool and Ibuprofen By Supercritical Fluid Chromatography

    Kosei Yonezawa, Junichi Sakabe

    AIChE Annual meeting 2017  2017.10 

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  • Debromination of tetrabromobisphenol A in an aqueous amine solution under hydrothermal conditions

    Yuta Kimura, Junichi Sakabe

    AIChE Annual meeting 2017  2017.10 

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  • Hydrothermal Conversion of Cellulosic Samples to Cello-oligosaccharides

    Taiki Kodama, Minori Taguchi

    PolyChar 2017  2017.10 

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  • 水溶液系動粘度の修正Eyring-活量係数式による相関と推算

    栃木 勝己, 松田 弘幸, 栗原 清文, Rattan V. K

    化学工学会第49回秋季大会  2017.9 

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  • 熱水条件下におけるアミン水溶液を用いた臭素系難燃剤の脱臭素化

    木村 雄太, 坂部 淳一

    化学工学会第49回秋季大会  2017.9 

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  • 超臨界および液体状態中におけるイブプロフェンの拡散係数の測定と相関

    杉浦 海斗, 孔 昌一

    化学工学会第49回秋季大会  2017.9 

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  • 超臨界流体クロマトグラフィーを用いたキラル分子の吸着速度定数および吸着平衡定数の決定

    米澤 宏誠, 坂部 淳一

    化学工学会第49回秋季大会  2017.9 

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  • 高温超臨界二酸化炭素中の拡散係数についての推算式の有効性

    山本 稔, 坂部 淳一, 孔 昌一

    化学工学会第49回秋季大会  2017.9 

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  • クロマトグラフィックインパルス応答法で測定される高温scCO2中でのCr(acac)3の拡散係数の有効性検討

    山本 稔, 田口 実, 坂部 淳一, 孔 昌一

    化学工学会第49回秋季大会  2017.9 

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  • Determination of adsorption rate parameters by supercritical fluid chromatography for chiral separation

    Kosei Yonezawa, Junichi Sakabe

    SFC Asia 2017  2017.7 

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  • Estimation of solubilities of Cr(acac)3 in supercritical carbon dioxide by supercritical fluid chromatography

    Minoru Yamamoto, Junichi Sakabe, Minori Taguchi, Chang Yi Kong

    SFC Asia 2017  2017.7 

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  • Prediction of retention factors for chiral compounds by correlation with density in supercritical fluid chromatography

    SFC Asia 2017  2017.7 

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  • 亜臨界メチルアミン水溶液を用いたテトラブロモビスフェノールAからの脱臭素

    木村雄太, 坂部淳一

    分離技術会年会2017  2017.5 

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  • 超臨界流体クロマトグラフィーを用いたtrans-stilbene oxide, linaloolおよびibuprofenにおけるキラル分離過程の解析

    米澤宏誠, 坂部淳一

    分離技術会年会2017  2017.5 

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  • CIR法を用いたscCO2中の高温領域におけるCr(acac)3の拡散係数の測定

    山本稔, 坂部淳一, 田口実, 孔昌一

    分離技術会年会2017  2017.5 

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  • 【基調講演】超臨界流体クロマトグラフィーの保持時間の予測とその課題

    分離技術会年会2017  2017.5 

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  • 量子化学計算を利用した状態方程式による平衡物性推算

    坂部淳一

    分離技術会年会2017  2017.5 

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  • 熱水条件下における純水を用いたWhitewoodの加水分解

    三上紗也加, 児玉大樹, 田口実

    第19回化学工学会学生発表会小金井大会  2017.3 

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  • 化学工学分野におけるスモールスケール実験の開発 PC265

    市之瀬理沙, 遠藤舜, 孫雲龍, 片山建二

    化学工学会第82年会  2017.3 

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  • 不均一ナノ触媒を利用したプラスチックの革新的解重合法 PC286

    田口実, 石川由貴, 片岡志帆, 名嘉 節

    化学工学会第82年会  2017.3 

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  • アミン添加熱水を用いたポリブチレンテレフタレートの解重合反応 PA125

    松澤太樹, 田口実

    化学工学会第82年会  2017.3 

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  • 液体及び超臨界状態中における金属錯体の拡散係数 PA111

    孔昌一, 室伏優希

    化学工学会第82年会  2017.3 

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  • 超臨界流体クロマトグラフィーによるキラル分離過程の解析 PA116

    米澤宏誠, 大野優奈, 田口実

    化学工学会第82年会  2017.3 

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  • 高温領域における超臨界二酸化炭素中でのクロム(III)アセチルアセトナートの拡散係数の測定 PA113

    山本稔, 田口 実, 孔昌一

    化学工学会第82年会  2017.3 

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  • 修正Eyring-活量係数式およびMcAllister式による液体動粘度の相関と推算 D324

    栃木勝己, 松田弘幸, 栗原 清文, Rattan V. K

    化学工学会第82年会  2017.3 

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  • 修正Eyring-Wilson式およびASOG-VISCO を用いたCO2加圧膨張液体動粘度の算出 D323

    松田 弘幸, 栗原 清文, 栃木 勝己, Rattan V. K

    化学工学会第82年会  2017.3 

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  • Determination of adsorption rate parameters by supercritical fluid chromatography for chiral separation

    SFC Asia 2017  2017 

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  • Estimation of solubilities of Cr(acac)3 in supercritical carbon dioxide by supercritical fluid chromatography

    SFC Asia 2017  2017 

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  • Prediction of retention factors for chiral compounds by correlation with density in supercritical fluid chromatography

    SFC Asia 2017  2017 

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  • Measurement of diffusion coefficients of chromium (III) acetylacetonate in supercritical carbon dioxide at high temperatures

    AIChE Annual meeting 2017  2017 

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  • Adsorption Rate Constant and Equilibrium Constant in Chiral Separation for Trans-Stilbene Oxide, Linalool and Ibuprofen By Supercritical Fluid Chromatography

    AIChE Annual meeting 2017  2017 

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  • Debromination of tetrabromobisphenol A in an aqueous amine solution under hydrothermal conditions

    AIChE Annual meeting 2017  2017 

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  • Hydrothermal Conversion of Cellulosic Samples to Cello-oligosaccharides

    PolyChar 2017  2017 

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  • Factors affecting retention factors in supercritical fluid chromatography

    SuperGreen 2017  2017 

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  • Taylor dispersion measurements for vitamin K3 in dense mixtures of CO2 and methanol

    SuperGreen 2017  2017 

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  • Measurements of molecular diffusion coefficients of ferrocene derivatives in supercritical carbon dioxide by chromatographic impulse response

    SuperGreen 2017  2017 

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  • Prediction of Liquid Kinematic Viscosities Using the EOS + GE Mixing Rule with Eyring-Activity Coefficient and ASOG-VISCO Models

    K. Tochigi, T. Okamura, H. Matsuda, K. Kurihara, T. Funazukuri, V.K. Rattan

    ATPC 2016 (The 11th Asian Thermodynamics Properties Conference)  2016.10 

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  • CO2 Solubility in Water containing Mono Saccharides, and the Prediction of pH using Peng-Robinson equation

    Tomoya Tsuji, Marina Shigeru, Taka-aki Hoshina, Kenichi Yoneda, Toshitaka Funazukuri, Noor Azian Morad

    ATPC2016 (The 11th Asian Thermodynamics Properties Conference)  2016.10 

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  • 吸着応答による超臨界二酸化炭素中における分散染料の溶解度と拡散係数の相関

    山崎太一, 田口実, 孔昌一, 船造俊孝

    第57回高圧討論会  2016.10 

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  • 粘度

    第25回「化学工学物性定数の最近の動向」講演会 化学工学物性測定の原理・方法、測定装置とその手順  2016.10 

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  • 3成分系動粘度のEyring-活量係数式による推算

    栃木勝己, 松田弘幸, 栗原清文, 船造俊孝, V. K. Rattan

    化学工学会第48回秋季大会  2016.9 

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  • 熱水条件下におけるメチルアミン水溶液を用いたテトラブロモビスフェノールA(TBBPA)の脱臭素化反応

    木村雄太, 田口実, 船造俊孝

    化学工学会第48回秋季大会  2016.9 

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  • 低濃度酸水溶液を用いた和紙の熱水加水分解

    児玉大樹, 平島健吾, 長島沙也香, 田口実, 船造俊孝

    化学工学会第48秋季大会  2016.9 

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  • 超臨界流体クロマトグラフィーを用いた超臨界流体物性測定

    超臨界流体ミニワークショップ  2016.9 

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  • 高圧CO2+メタノール混合流体中におけるビタミンK3の拡散係数の測定

    鈴木隆正, 田口実, 孔昌一

    分離技術会年会 2016  2016.5 

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  • CIR法による超臨界二酸化炭素中でのCr(acac)3の拡散係数の測定及び溶解度の推算

    大久保悠貴, 山﨑太一, 鈴木隆正, 田口実, 船造俊孝, 孔昌一

    分離技術会年会 2016  2016.5 

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  • Solubilities and Diffusion Coefficients of Dyestuffs in Supercritical Carbon Dioxide by Chromatographic Method

    14th PPEPPD2016 (International Conference on Properties and Phase Equilibria for Product and Process Design  2016.5 

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  • 液体及び超臨界状態中における金属錯体の拡散係数の測定と相関

    森下陽平, 孔昌一, 船造俊孝

    化学工学会第81年会  2016.3 

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  • 熱水条件下におけるアミン水溶液を用いたテトラブロモビスフェノールA(TBBPA)の脱臭素化

    木村雄太, 田口実, 船造俊孝

    化学工学会第81年会  2016.3 

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  • 高圧混合流体の拡散係数と粘度の過剰量との関係

    船造俊孝, 杉原智人, 田口実, 孔昌一

    化学工学会第81年会  2016.3 

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  • CeO2ナノ触媒を利用したプラスチックのケミカルリサイクル

    田口実, 石川由貴, 片岡志帆, 名嘉節, 船造俊孝

    化学工学会第81年会  2016.3 

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  • スモールスケール実験手法を用いた学部生向け化学工学教育

    片山建二, 桒原彰太, 大木翔太郎, 中重智樹, 船造俊孝

    化学工学会第81年会  2016.3 

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  • Production of cellooligosaccharides from hydrothermal conversion of various celluloses

    Energy materials and nanothechnology meeting on cellulose  2016.3 

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  • Hydrothermal conversion of various cellulosic samples to mono- and oligosaccharides in a semi-batch reactor

    5th International Solvothermal and hydrothermal association conference  2016.1 

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  • Hydrothermal conversion of various cellulosic samples to mono- and oligosaccharides in a semi-batch reactor

    5th International Solvothermal and hydrothermal association conference  2016 

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  • Production of cellooligosaccharides from hydrothermal conversion of various celluloses

    Energy materials and nanothechnology meeting on cellulose  2016 

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  • Solubilities and Diffusion Coefficients of Dyestuffs in Supercritical Carbon Dioxide by Chromatographic Method

    14th PPEPPD2016 (International Conference on Properties and Phase Equilibria for Product and Process Design  2016 

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  • Prediction of Liquid Kinematic Viscosities Using the EOS + GE Mixing Rule with Eyring-Activity Coefficient and ASOG-VISCO Models

    ATPC 2016 (The 11th Asian Thermodynamics Properties Conference)  2016 

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  • CO2 Solubility in Water containing Mono Saccharides, and the Prediction of pH using Peng-Robinson equation

    ATPC2016 (The 11th Asian Thermodynamics Properties Conference)  2016 

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  • Correlation of retention factors for chiral separation in supercritical fluid chromatography in the presence of co-solvent

    Toshitaka Funazukuri, Tomohito Sugihara, Shouhei Wakamiya, Yuna Ohono, Minori Taguchi, Chang Yi Kong

    PacifiChem 2015  2015.12 

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  • PEG 被覆カラムを用いた超臨界二酸化炭素中における分散染料の拡散係数と溶解度の測定と相関

    山﨑太一, 田口実, 船造俊孝, 孔昌一

    第56回高圧討論会  2015.11 

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  • 超臨界流体クロマトグラフィーを用いたエナンチオマー分離における溶媒組成と保持時間の関係

    大野優奈, 田口実, 孔昌一, 船造俊孝

    第56回高圧討論会  2015.11 

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  • 三成分系動粘度のEyring-Wilson式による相関

    栃木勝己, 松田弘幸, 栗原清文, 船造俊孝, Rattan V. K

    化学工学会第47回秋季大会  2015.9 

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  • 熱水条件下におけるアミン水溶液を用いたPVCの脱塩素(B213)

    石橋卓也, 津田瑠璃子, 田口実, 船造俊孝

    化学工学会第47回秋季大会  2015.9 

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  • 熱水条件下における和紙の加水分解(B202)

    児玉大樹, 平島健吾, 田口実, 船造俊孝

    化学工学会第47回秋季大会  2015.9 

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  • Measurement of diffusion coefficient and solubility estimation for dyes in supercritical carbon dioxide by CIR method

    Toshitaka Funazukuri, Yamasaki Taichi, Minori Taguchi, Chang Yi Kong

    MTMS 2015 (Molecular Thermodynamics and Molecular Simulation)  2015.8 

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  • Measurement and correlation of diffusion coefficients of metal complex in supercritical and liquid states.

    Chang Yi Kong, Yoshiki Yakumaru, Toshitaka Funazukuri

    MTMS 2015(Molecular Thermodynamics and Molecular Simulation)  2015.8 

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  • ガス膨張液体の粘度および拡散係数の過剰量について

    船造 俊孝, 杉原 智人, 由井 和子, 田口 実, 孔 昌一

    分離技術会年会 2015  2015.5 

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  • 超臨界二酸化炭素に対する薬物の拡散係数

    渡邉昂, 孔昌一

    化学工学会第80年会  2015.3 

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  • 3成分系動粘度と気液平衡のEyring式およびWilson式による推算

    栃木勝己, 松田弘幸, 栗原清文, V.K.Tattan

    化学工学会第80年会  2015.3 

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  • 熱水条件下における低濃度酸水溶液を用いたろ紙の加水分解速度

    児玉大樹, 平島健吾, 田口実

    化学工学会第80年会  2015.3 

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  • 熱水条件下におけるアミン水溶液を用いたPVCの脱塩素

    石橋卓也, 但住千明, 津田瑠璃子, 池田大輔, 田口実

    化学工学会第80年会  2015.3 

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  • Measurement of diffusion coefficient and solubility estimation for dyes in supercritical carbon dioxide by CIR method

    MTMS 2015 (Molecular Thermodynamics and Molecular Simulation)  2015 

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  • Measurement and correlation of diffusion coefficients of metal complex in supercritical and liquid states.

    MTMS 2015(Molecular Thermodynamics and Molecular Simulation)  2015 

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  • Correlation of retention factors for chiral separation in supercritical fluid chromatography in the presence of co-solvent

    PacifiChem 2015  2015 

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  • Prediction of kinematic viscosity and vapor-liquid equilibria for ternary systems using Wilson activity coefficient equation

    K. Tochigi, H. Matsuda, K. Kurihara, T. Funazukuri, V. K. Rattan

    10th International Conference on Separation Science and Tschnology  2014.12 

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  • 超臨界二酸化炭素中における金属錯体の拡散係数及び部分モル体積

    孔昌一, 白鳥祐基

    第55回高圧討論会  2014.11 

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  • 高圧混合流体中における拡散係数の測定と相間

    第55回高圧討論会  2014.11 

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  • 超臨界流体クロマトグラフィーによる光学異性体分離における保持時間の推算

    大野優奈, 杉原智人, 若宮昇平, 田口実

    第55回高圧討論会  2014.11 

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  • クロマトグラフィックインパルス応答法による超臨界二酸化炭素中における分散染料の無限希釈拡散係数と保持時間

    山﨑太一, 杉原智人, 田口実, 孔昌一

    第55回高圧討論会  2014.11 

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  • Predictive Correlation for Binary Diffusion Coefficients in Water at Ambient Pressure

    10th International Conference on Separation Science and Technology  2014.10 

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  • Effects of adding organic acid at dilute concentration on hydrothermal depolymerization of cellulose

    Kengo Hirajima, Minori Taguchi

    ISHA 2014 (International Society of Hydrothermal and Solvothermal Association)  2014.10 

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  • Diffusion coefficients of organic compounds in mixture of CO2 and methanol at infinitesimal concentration

    Tomohito Sugihara, Minori Taguchi

    ISHA 2014(International Society of Hydrothermal and Solvothermal Association)  2014.10 

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  • Advantages on heterogeneous reactions under hydrothermal conditions

    ISHA 2014 (International Society of Hydrothermal and Solvothermal Association)  2014.10 

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  • 超臨界水を利用したin-situ表面修飾法によるモノカルボン酸修飾CeO2ナノ粒子合成

    山本直美, 田口実, 中根茂行, 名嘉節

    セラミックス協会第27回秋季シンポジウム  2014.9 

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  • 超臨界及び液体溶媒中における金属錯体の拡散係数

    薬丸佳樹, 孔昌一

    化学工学会第46回秋季大会  2014.9 

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  • 超臨界クロマトグラフィーを用いたtrans-スチルベンオキシドの光学異性体分離

    杉原智人, 田口実

    化学工学会 第46回秋季大会  2014.9 

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  • 希薄酸を用いたセルロースの解重合における可溶化速度

    平島健吾, 竹村航, 田口実

    化学工学会第46回秋季大会  2014.9 

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  • 水熱法に基づいたデカジフェニルエーテル(DBDE)の脱臭素化法の開発

    池田大輔, 田口実

    廃棄物資源循環学会第25回研究発表会  2014.9 

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  • アミン添加熱水を利用したポリカーボネートの解重合反応

    大下春菜, 石川由貴, 川上尚之, 田口実

    廃棄物資源循環学会第25回研究発表会  2014.9 

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  • 液体及び超臨界状態中における金属錯体の拡散係数の測定

    白鳥祐基, 孔昌一, 船造俊孝

    化学工学会第79年会  2014.3 

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  • スピネルCoAl2O4の焼成温度と物性の相関性

    田口実, 中根茂行, 目義雄, 松下明行, 船造俊孝, 名嘉節

    化学工学会第79年会  2014.3 

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  • 超臨界二酸化炭素中における各種金属錯体の拡散係数の推算

    船造俊孝, 孔 昌一, 田口 実

    化学工学会第79年会  2014.3 

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  • Predictive Correlation for Binary Diffusion Coefficients in Water at Ambient Pressure

    10th International Conference on Separation Science and Technology  2014 

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  • Effects of adding organic acid at dilute concentration on hydrothermal depolymerization of cellulose

    ISHA 2014 (International Society of Hydrothermal and Solvothermal Association)  2014 

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  • Diffusion coefficients of organic compounds in mixture of CO2 and methanol at infinitesimal concentration

    ISHA 2014(International Society of Hydrothermal and Solvothermal Association)  2014 

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  • Advantages on heterogeneous reactions under hydrothermal conditions

    ISHA 2014 (International Society of Hydrothermal and Solvothermal Association)  2014 

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  • Prediction of kinematic viscosity and vapor-liquid equilibria for ternary systems using Wilson activity coefficient equation

    10th International Conference on Separation Science and Tschnology  2014 

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  • 超臨界及び液体状態中におけるトリス(アセチルアセトナト)アルミニウムの拡散係数の測定と相関

    孔昌一, 渡辺昴, 船造 俊孝, 梅木 辰也

    化学工学会第45回秋季大会  2013.9 

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  • CO2-メタノール混合流体中における有機化合物の無限希釈拡散係数

    杉原智人, 田口実, 船造俊孝

    化学工学会第45回秋季大会  2013.9 

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  • 塩基性熱水による臭素化難燃剤の脱臭素化

    池田大輔, 伊藤明植, 田口 実, 船造 俊孝

    化学工学会第45回秋季大会  2013.9 

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  • メチルアミン水溶液を用いたポリカーボネート製品の水熱解重合

    大下 春菜, 田口 実, 船造 俊孝

    化学工学会第45回秋季大会  2013.9 

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  • 熱水を用いたセルロースの糖化における希薄酸添加の効果

    平島健吾, 小澤 慎吾, 田口 実, 船造 俊孝

    化学工学会第45回秋季大会  2013.9 

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  • 希薄ギ酸水溶液を用いたセルロース繊維の糖化

    平島健吾, 小澤慎吾, 田口実, 船造 俊孝

    グリーンケミストリー研究会  2013.8 

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  • メチルアミンを添加した熱水によるポリカーボネート製品の解重合

    大下 春菜, 田口 実, 船造 俊孝

    グリーンケミストリー研究会  2013.8 

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  • 超臨界水熱合成法を利用したモノカルボン酸修飾CeO2ナノ粒子の合成と評価

    山本直美, 田口実, 船造俊孝, 中根茂行, 名嘉敬

    化学工学会第78回年会  2013.3 

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  • CO2膨張メタノール中におけるビタミンK3の拡散係数の測定

    杉原智人, 石井智大, 由井和子, 船造俊孝

    化学工学会第78回年会  2013.3 

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  • 熱水条件下のメチルアミン水溶液を用いたポリカーボネートの解重合

    大下春菜, 若林奈都美, 田口実, 船造俊孝

    化学工学会第78回年会  2013.3 

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  • 希薄酸水溶液を用いた熱水条件下におけるセルロースの加水分解

    平島健吾, 小澤慎吾, 田口実, 船造俊孝

    化学工学会第78回年会  2013.3 

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  • 過剰自由エネルギー型混合則+NRTLモデルによる超臨界二酸化炭素+溶剤系の高圧動粘度の推算

    栃木勝己, 岡村智彦, 松田弘幸, 栗原清文, 船造俊孝

    化学工学会第78回年会  2013.3 

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  • 超臨界流体クロマトグラフィーを用いた部分モル体積や拡散係数の測定

    孔昌一, 渡辺昴, 船造俊孝

    化学工学会第78回年会  2013.3 

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  • 超臨界流体クロマトグラフィーの基礎理論-混合溶媒系の問題点

    船造俊孝

    第8回 SFC研究会  2013.2 

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  • Hydrothermal cvonversion of celluloses to glucose and cellooligosaccharides in dilute aqueous formic acid solution

    S. Ozawa, T. Funazukuri

    ISHA 2013(International Society for Solvothermal and Hydrothermal) conference  2013.1 

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  • Hydrothermal conversion of 1-bromododecane to 1-dodecanol in aqueous 2-butanone solution without catalysts

    Y. Goto, T. Funazukuri

    ISHA 2013 (International Society for Hydrothermal and Solvothermal) conference  2013.1 

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  • Hydrothermal cvonversion of celluloses to glucose and cellooligosaccharides in dilute aqueous formic acid solution

    ISHA 2013(International Society for Solvothermal and Hydrothermal) conference  2013 

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  • Hydrothermal conversion of 1-bromododecane to 1-dodecanol in aqueous 2-butanone solution without catalysts

    ISHA 2013 (International Society for Hydrothermal and Solvothermal) conference  2013 

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  • 超臨界二酸化炭素および液体溶媒中における金属錯体の拡散係数の測定と相関

    船造俊孝

    第24回中央大学学術シンポジウム「ナノスケール・ミクロスケールから見たビッグな世界」  2012.12 

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  • Binary diffusion coefficients and partial molar volumes of phenylbutazone in supercritical CO2

    C. Y. Kong, K. Watanabe, K. Suzuki, T. Funazukuri

    MTMS 2013(Molecular thermodynamics and molecular simulation)  2012.9 

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  • Measurement and correlation of binary diffusion coefficients of metal complexes in supercritical carbon dioxide and liquid organic solvents

    T. Funazukuri, R. Katouoka, K. Yui, C. Y. Kong

    MTMS 2012 (Molecular thermodynamics and molecular simulation)  2012.9 

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  • 熱水条件下の低濃度酸水溶液を用いたセルロースの加水分解

    小澤慎吾, 船造俊孝

    化学工学会第44回秋季大会  2012.9 

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  • ハロゲン化アルキルの水酸基置換反応における両親媒性溶媒添加熱水の効果

    後藤由季, 山口諒, 和田真輔, 船造俊孝

    化学工学会第44回秋季大会  2012.9 

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  • 超臨界水熱合成法を利用した表面修飾ZrO2ナノ粒子の合成

    田口実, 高見誠一, 阿尻雅文, 船造俊孝, 中根茂行, 名嘉節

    化学工学会第44回秋季大会  2012.9 

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  • 希薄アミン水溶液によるポリカーボネーとのモノマー化

    船造俊孝

    第1回グリーンケミストリー研究会シンポジウム  2012.8 

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  • 希薄トリメチルアミン水溶液を用いたポリエチレンテレフタレートのモノマー化

    若林奈都美, 船造俊孝

    第1回グリーンケミストリー研究会シンポジウム  2012.8 

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  • Measurement and Correlation of Infinite Dilution Diffusion Coefficients in CO2 Expanded Liquids

    The second Chuo University, Chemistry Workshop between National Central University and Chuo University  2012.8 

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  • CO2-メタノール混合流体中におけるビタミンK3の拡散係数

    石井智大, 山田浩史, 由井和子, 船造俊孝, 孔昌一, 影井清一郎

    分離技術会 年会2012  2012.6 

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  • 超臨界二酸化炭素中におけるacac錯体の相互拡散係数の測定と溶解度の相関

    加藤岡亮平, 藤田崇弘, 由井和子, 船造俊孝, 孔昌一

    分離技術会 年会2012  2012.6 

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  • Measurements of infinite dilution diffusion coefficients of vitamin K3 in mixtures of CO2 and methanol

    T. Ishii, H. Yamada, K. Yui, T. Funazukuri, C. Y. Kong

    ISSF 2012 (International Symposium on Supercritical Fluids 2012)  2012.5 

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  • Tracer diffusion coefficients of solutes in CO2 expanded methanol by molecular dynamics simulation

    K. Yui, M. Toriumi, T. Funazukuri

    ISSF 2012 (International Symposium on Supercritical Fluids 2012)  2012.5 

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  • Measurement and correlation of infinite dilution coefficients in CO2 expanded liquids

    Toshitaka Funazukuri

    ISSF2012 (International Symposium on Supercritical Fluids 2012)  2012.5 

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  • 高温高圧水中における硫酸カリウムの溶解度の測定

    化学工学会第77年会  2012.3 

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  • エタノール及び超臨界二酸化炭素中におけるフェニルブタゾンの拡散係数

    与那原悠太, 西村真奈美, 岩本晃, 白鳥智也, 孔昌一

    化学工学会第77年会  2012.3 

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  • ポリエチレンテレフタレートの解重合反応におけるアミン熱水の効果

    若林奈都美, 小島智春

    化学工学会第77年会  2012.3 

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  • ポリカーボネートの水熱解重合反応における添加アミン種の比較

    小島智春, 若林奈都美

    化学工学会第77年会  2012.3 

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  • Measurements of infinite dilution diffusion coefficients of vitamin K3 in mixtures of CO2 and methanol

    ISSF 2012 (International Symposium on Supercritical Fluids 2012)  2012 

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  • Tracer diffusion coefficients of solutes in CO2 expanded methanol by molecular dynamics simulation

    ISSF 2012 (International Symposium on Supercritical Fluids 2012)  2012 

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  • Measurement and correlation of infinite dilution coefficients in CO2 expanded liquids

    ISSF2012 (International Symposium on Supercritical Fluids 2012)  2012 

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  • Measurement and Correlation of Infinite Dilution Diffusion Coefficients in CO2 Expanded Liquids

    The second Chuo University, Chemistry Workshop between National Central University and Chuo University  2012 

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  • Binary diffusion coefficients and partial molar volumes of phenylbutazone in supercritical CO2

    MTMS 2013(Molecular thermodynamics and molecular simulation)  2012 

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  • Measurement and correlation of binary diffusion coefficients of metal complexes in supercritical carbon dioxide and liquid organic solvents

    MTMS 2012 (Molecular thermodynamics and molecular simulation)  2012 

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  • Measurements of binary diffusion coefficients of platinum(II) acetylacetonate in supercritical CO2 and liquid ethanol by transient response techniques

    ICSST11 (International Conference on Separation Science and Technology)  2011.11 

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  • Measurements of binary diffusion coefficients for Cr(acac)3 in supercriticalcarbon dioxide

    Ryohei Katouoka, Takahiro Fujita, Kazuko Yui, Chang Yi Kong, Seiichiro Kagei

    ICSST11(International Conference on Separation Science and Technology)  2011.11 

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  • Tracer diffusion coefficient of solute in CO2 expanded methanol by molecular dynamics simulation

    Kazuko Yui, Minori Toriumi

    ICSST11 (International Conference on Separation Science and Technology)  2011.11 

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  • Infinite dilution diffusion coefficients of vitamin K3 in CO2 expanded methanol using Taylor dispersion method

    Tomohiro Ishii, Yusuke Sawamura, Kazuko Yui

    ICSST11 (International Conference on Separation Science and Technology)  2011.11 

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  • 高温高圧水中における硫酸塩の溶解度の測定

    由井和子, 町田綾子

    化学工学会第43回秋季大会  2011.9 

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  • 超臨界CO2に対する白金アセチルアセトナート錯体の拡散係数の測定と相関

    与那原悠太, 孔昌一

    化学工学会第43回秋季大会  2011.9 

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  • CO2膨張メタノールにおけるビタミンK3の無限希釈拡散係数の測定

    石井智大, 米良篤史, 澤村勇介, 由井和子

    化学工学会第43回秋季大会  2011.9 

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  • 希薄酸水溶液の熱水条件下おけるポテトパルプの糖化

    木下哲, 川尻聡

    化学工学会第43回秋季大会  2011.9 

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  • 水熱糖化による馬鈴しょ澱粉製造残渣のエタノール変換技術の開発

    川尻聡, 山崎祐二, 奈良知幸, 大村啓介

    化学工学会第43回秋季大会  2011.9 

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  • 熱水条件下におけるグルコースからの5-HMFの生成速度

    合田朋樹, 山根岳人

    化学工学会第43回秋季大会  2011.9 

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  • 熱水によるフコイダンの加水分解

    渡邊博之, 桃木良輔

    化学工学会第43回秋季大会  2011.9 

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  • デンプンの熱水糖化における反応モデル

    村里正

    化学工学会第43回秋季大会  2011.9 

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  • 熱水条件下でのアミン水溶液によるポリエチレンテレフタレートの解重合

    若林奈都美, 小島智春

    化学工学会第43回秋季大会  2011.9 

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  • アルカリ熱水によるヒダントイン誘導体の加水分解反応

    和田真輔, 古泉善行

    化学工学会第43回秋季大会  2011.9 

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  • 強塩基性熱水を用いたポリカーボネートの解重合反応におけるアミン添加の効果

    小島智春, 若林奈都美

    化学工学会第43回秋季大会  2011.9 

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  • 熱水雰囲気中におけるポリ乳酸の解重合反応速度

    尹 暁卉

    化学工学会第43回秋季大会  2011.9 

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  • Reaction Kinetics on Hydrothermal Saccharification of Starch in the Presence of Organic Acids

    Tadashi Murasato

    Super Green 2011 (The 7th International Conference on SUpercritical Fluids)  2011.8 

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  • Hydrothermal conversion of polycarbonate to bisphenol A in an aqueous amine solution

    Tomoharu Kojima

    Super Green 2011 (THe 7th International Conference on Supercritical Fluids)  2011.8 

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  • Chemical recycling of poly(ethylene terephthalate) in hydrothermal amine solutions

    Natsumi Wakabayashi

    Super Green 2011 (The 7th International Conference on Supercritical Fluids)  2011.8 

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  • Dilute aqueous amine solution under hydrothermal conditions as a reaction media for depolymerization of polyesters and polycarbonates

    Super Green2011 (The 7th International Conference on Supercritical Fluids)  2011.8 

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  • アンモニア、アミン熱水を用いたポリエステル、ポリカーボネートのモノマー化

    超臨界流体部会 第10回サマースクール  2011.8 

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  • 高温高圧水中の硫酸ナトリウムの溶解度の測定

    由井和子, 町田綾子

    分離技術会年会2011  2011.6 

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  • 水中における直鎖状アミノ酸の拡散係数の測定と相関

    野田雄一郎, 由井和子

    分離技術会年会2011  2011.6 

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  • 半回分式反応器を用いた塩基性熱水によるポリ乳酸の解重合速度の測定

    尹 暁卉, 船造 俊孝

    化学工学会第76年会  2011.3 

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  • インパルス応答法による超臨界二酸化炭素中の部分モル体積測定

    松田 遼佑, 孔 昌一, 岡島 いづみ, 佐古 猛, 船造 俊孝

    化学工学会第76年会  2011.3 

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  • Reaction Kinetics on Hydrothermal Saccharification of Starch in the Presence of Organic Acids

    Super Green 2011 (The 7th International Conference on SUpercritical Fluids)  2011 

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  • Hydrothermal conversion of polycarbonate to bisphenol A in an aqueous amine solution

    Super Green 2011 (THe 7th International Conference on Supercritical Fluids)  2011 

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  • Chemical recycling of poly(ethylene terephthalate) in hydrothermal amine solutions

    Super Green 2011 (The 7th International Conference on Supercritical Fluids)  2011 

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  • Dilute aqueous amine solution under hydrothermal conditions as a reaction media for depolymerization of polyesters and polycarbonates

    Super Green2011 (The 7th International Conference on Supercritical Fluids)  2011 

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  • Measurements of binary diffusion coefficients of platinum(II) acetylacetonate in supercritical CO2 and liquid ethanol by transient response techniques

    ICSST11 (International Conference on Separation Science and Technology)  2011 

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  • Measurements of binary diffusion coefficients for Cr(acac)3 in supercriticalcarbon dioxide

    ICSST11(International Conference on Separation Science and Technology)  2011 

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  • Tracer diffusion coefficient of solute in CO2 expanded methanol by molecular dynamics simulation

    ICSST11 (International Conference on Separation Science and Technology)  2011 

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  • Infinite dilution diffusion coefficients of vitamin K3 in CO2 expanded methanol using Taylor dispersion method

    ICSST11 (International Conference on Separation Science and Technology)  2011 

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  • Measurements of Binary Diffusion Coefficients of Metal Complexes in Supercritical Carbon Dioxide and Liquid Organic Solvents by Transient Response Techniques

    T. Funazukuri, C. Y. Kong, S. Kagei

    2010 AIChE Annual Meeting  2010.11 

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  • 二酸化炭素-メタノール系高圧混合流体中の溶質トレーサー拡散係数の分子動力学計算

    由井 和子, 船造 俊孝

    第51回高圧討論会  2010.10 

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  • 超臨界流体および液体溶媒中におけるフェロセンの拡散係数の測定と相関

    船造 俊孝, 加藤岡 亮平, 鳥海 秀, 石井 智大, 由井 和子, 孔 昌一, 影井 清一郎

    第51回高圧討論会  2010.10 

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  • Taylor法を用いた有機溶媒中におけるフェロセン類の相互拡散係数の測定と相関

    加藤岡 亮平, 石井 智大, 由井 和子, 船造 俊孝, 孔 昌一, 影井 清一郎

    化学工学会第42回秋季大会  2010.9 

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  • 二酸化炭素―有機溶媒混合系におけるビタミン類の無限希釈拡散係数の測定

    澤村 勇介, 米良 篤史, 由井 和子, 船造 俊孝, 孔 昌一, 影井清一郎

    化学工学会第42回秋季大会  2010.9 

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  • クロマトグラフィックインパルス応答法を用いる超臨界二酸化炭素中の溶解度測定法の開発

    孔 昌一, 曽根 健司, 岡島 いづみ, 佐古 猛, 船造 俊孝

    化学工学会第42回秋季大会  2010.9 

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  • アミン含有熱水によるポリカーボネートの解重合

    小島 智春, 船造 俊孝

    化学工学会第42回秋季大会  2010.9 

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  • 馬鈴しょポテトパルプの水熱可溶化

    木下 哲, 船造 俊孝, 川尻 聡

    化学工学会第42回秋季大会  2010.9 

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  • 両親媒性溶媒添加熱水によるハロゲン化アルキルからのアルコールの生成

    和田 真輔, 井上 雄介, 小沼 孝博, 船造 俊孝

    化学工学会第42回秋季大会  2010.9 

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  • 水熱処理と酵素糖化を組み合わせた馬鈴しょデンプン製造残渣の糖化プロセスの検討

    山﨑 祐二, 奈良 知幸, 大村 啓介, 船造 俊孝, 川尻 聡

    化学工学会第42回秋季大会  2010.9 

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  • 超臨界流体クロマトグラフィーを用いた物性値の測定 -拡散係数,溶解度,部分モル体積

    船造 俊孝

    化学工学会第42回秋季大会  2010.9 

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  • 超臨界CO2+有機金属化合物系の拡散係数の測定及び相関

    中村 雅人, 孔 昌一, 船造 俊孝

    化学工学会宇都宮大会  2010.8 

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  • 塩基性熱水雰囲気下におけるポリカーボネートのケミカルリサイクル

    松山 公亮, 笹井 裕也, 船造 俊孝

    化学工学会宇都宮大会  2010.8 

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  • CIR法を用いた超臨界二酸化炭素中の金属錯体の溶解度測定

    曽根 健司, 孔 昌一, 岡島 いづみ, 佐古 猛, 船造 俊孝, 影井 清一郎

    化学工学会宇都宮大会  2010.8 

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  • Chemical recycling of poly(L-lactic acid) in dilute aqueous alkali solution

    X, H, Yin, F. Minamide, M. Yagihashi, T. Funazukuri

    The 2nd International Solvothermal & Hydrothermal Association Conference  2010.7 

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  • Hydrothermal saccharification of various types of celluloses in dilute formic acid solution

    T. Funazukuri

    The 2nd International Solvothermal & Hydrothermal Association Conference  2010.7 

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  • Taylor法による有機溶媒中の金属錯体の拡散係数の測定

    加藤岡 亮平, 石井 智大, 鳥海 秀, 由井 和子, 船造 俊孝

    分離技術会年会2010(神田)  2010.6 

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  • Taylor法による水中のアミノ酸の拡散係数の測定

    小井戸 基訓, 野田 雄一郎, 由井 和子, 船造 俊孝

    分離技術会年会2010(神田)  2010.6 

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  • 動的光散乱法によるガス膨張液体中のナノ粒子の膨潤・凝集挙動に関する研究

    澤村 勇介, 由井 和子, 船造 俊孝

    分離技術会年会2010(神田)  2010.6 

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  • Measurements of solubilities of organometallic complexes in supercritical carbon dioxide by the chromatographic impulse response method

    C. Y. Kong, K. Sone, T. Sako, T. Funazukuri, S. Kagei

    The Twelfth International Conference on Properties and Phase Equilibria for Product and Process Design  2010.5 

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  • テイラー法を用いた金属錯体の拡散係数の測定

    加藤岡 亮平, 由井 和子, 船造 俊孝

    第12回化学工学会学生発表東京大会(豊洲)  2010.3 

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  • 希薄アルカリ熱水による高分子樹脂のケミカルリサイクル

    岩田 早友実, 南出 冬実, 笹井 裕也, 船造 俊孝

    第12回化学工学会学生発表会東京大会(豊洲)  2010.3 

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  • 超臨界流体中における拡散係数の測定と相関

    船造 俊孝

    化学工学会第75年会(鹿児島)  2010.3 

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  • 馬鈴しょデンプン粕の熱水可溶化・糖化に及ぼす処理条件の影響

    木下 哲, 船造 俊孝, 川尻 聡

    化学工学会第75年会(鹿児島)  2010.3 

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  • 液体および超臨界二酸化炭素中における各種金属錯体の拡散係数の測定と相関

    孔 昌一, 鳥海 秀, 船造 俊孝, 影井 清一郎

    化学工学会第75年会(鹿児島)  2010.3 

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  • Chemical recycling of various polyesters in aqueous dilute alkali solution under hydrothermal conditions

    Toshitaka Funazukuri

    The 5th International Conference on Material Recycling Engineering  2010.3 

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  • 希薄アルカリ性熱水によるポリエステル類のケミカルリサイクル

    第5回資源循環工学国際会議  2010 

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  • Measurements of solubilities of organometallic complexes in supercritical carbon dioxide by the chromatographic impulse response method

    The Twelfth International Conference on Properties and Phase Equilibria for Product and Process Design  2010 

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  • Chemical recycling of poly(L-lactic acid) in dilute aqueous alkali solution

    The 2nd International Solvothermal & Hydrothermal Association Conference  2010 

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  • Hydrothermal saccharification of various types of celluloses in dilute formic acid solution

    The 2nd International Solvothermal & Hydrothermal Association Conference  2010 

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  • Measurements of Binary Diffusion Coefficients of Metal Complexes in Supercritical Carbon Dioxide and Liquid Organic Solvents by Transient Response Techniques

    2010 AIChE Annual Meeting  2010 

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  • Measurements of binary diffusion coefficients for organometallic compounds in organic solvents by the Taylor dispersion method

    M. Toriumi, R. Katouoka, K. Yui, T. Funazukuri, C. Y. Kong, S. Kagei

    MTMS2009,|rn|The 5th International Conference on Molecular Thermodynamics & Molecular Simulation  2009.10 

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  • Molecular dynamics simulation on the hydration and ion pair association of NaCl in supercritical water

    M. Sakuma, K. Yui, T. Funazukuri

    MTMS2009|rn|The 5th International Conference on Molecular Thermodynamics & Molecular Simulation  2009.10 

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  • Using chromatographic impulse response technique to determine diffusion coefficients of metal complexes at infinite dilution in supercritical carbon dioxide

    C. Y. Kong, Y. Gu, M. Nakamura, T. Funazukuri, S. Kagei

    MTMS2009|rn|The 5th International Conference on Molecular Thermodynamics & Molecular Simulation  2009.10 

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  • Hydrothermal Dilute Alkali Solution as Novel Hydrolysis Medium in Depolymerization of Polyesters

    Toshitaka Funazukuri

    Super Green 2009,|rn|The 6th International Conference on Supercritical Fluids  2009.10 

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  • Hydrothermal Degradation of Starch Loaded at High Concentration

    Katsuhiro Arai, Kazuko Yui, Toshitaka Funazukuri

    Super Green 2009,|rn|The 6th International Conference on Supercritical Fluids  2009.10 

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  • Direct Observation of Depolymerization Reaction of Polycarbonate

    Yuya Sasai, Kosuke Matsuyama, Kazuko Yui, Toshitaka Funazukuri

    Super Green 2009|rn|The 6th International Conference on Supercritical Fluids  2009.10 

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  • 超臨界二酸化炭素中におけるアセチルアセトンコバルト(Ⅲ)錯体の拡散係数

    与那原 悠太, 顧 媛媛, 孔 昌一, 船造 俊孝, 影井 清一郎

    化学工学会第41回秋季大会〈広島)  2009.9 

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  • フェロセン類の相互拡散係数の測定と相関

    鳥海 秀, 加藤岡 亮平, 孔 昌一, 由井 和子, 船造 俊孝, 影井 清一郎

    化学工学会第41回秋季大会〈広島)  2009.9 

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  • ガス膨張液体中におけるナノ粒子の粒径変化

    澤村 勇介, 由井 和子, 船造 俊孝

    化学工学会第41回秋季大会(広島)  2009.9 

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  • デンプンの熱水糖化に及ぼす有機酸の影響

    村里 正, 船造 俊孝

    化学工学会第41回秋季大会(広島)  2009.9 

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  • 塩基性熱水雰囲気下におけるビスフェノールAの分解反応

    松山 公亮, 大倉 神奈, 船造 俊孝

    化学工学会第41回秋季大会(広島)  2009.9 

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  • エタノール製造のための馬鈴しょデンプン粕の熱水可溶化処理

    木下 哲, 船造 俊孝, 川尻 聡

    化学工学会第41回秋季大会(広島)  2009.9 

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  • Hydrothermal Conversions of Polycarbonate and Polyethylene Naphthalate into Monomers in the Presence of Ammonia

    Toshitaka Funazukuri, Kohei Hatakeyama, Risa Arai

    ICMAT2009,|rn|International Conference on Materials for Advanced Technologies 2009(Singapore)  2009.7 

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  • Relationship Between the Critical Anomaly of the Solute Diffusion Coefficient in Supercritical CO2 and the Local and Long Range Density Augmentation Evaluated from the Kirkwood-Buff's Fluctuation Theory

    Kazuko Yui, Toshitaka Funazukuri, Chang Yi Kong, Seiichiro Kagei

    ISSF2009,|rn|The 12th International Conference on Supercritical Fluids (Arcachon)  2009.5 

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  • Dynamic light scattering studies on the diffusion of nano particles in CO2 expanded organic liquids

    Y. Sawamura, K. Yui, N. Yoshida, T. Funazukuri

    ISSF2009,|rn|The 12th International Conference on Supercritical Fluids (Arcachon)  2009.5 

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  • Predictive Correlation for Binary Diffusion Coefficients of Lipids in Supercritical Carbon Dioxide

    T. Funazukuri, M. Toriumi, K. Yui, C. Y. Kong, S. Kagei

    ISSF2009,|rn|The 12th International Conference on Supercritical Fluids (Arcachon)  2009.5 

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  • Measurements of Binary Diffusion Coefficients for Ferrocenes in Supercritical Carbon Dioxide

    C. Y. Kong, M. Nakamura, K. Sone, T. Funazukuri, S. Kagei

    ISSF2009|rn|The 12th International Conference on Supercritical Fluids (Arcachon)  2009.5 

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  • 試料サイズの直接測定による塩基性熱水雰囲気下におけるポリエステルの解重合速度

    松山 公亮, 笹井 裕也, 荒井 理沙, 由井 和子, 船造 俊孝

    化学工学会第74年会(横浜)  2009.3 

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  • CO2膨張液体中における微粒子の拡散係数の測定

    澤村 勇介, 由井 和子, 船造 俊孝

    化学工学会第74年会(横浜)  2009.3 

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  • 超臨界二酸化炭素中におけるフェロセンの相互拡散係数の測定

    中村 雅人, 孔 昌一, 影井 清一郎

    化学工学会第74年会(横浜)|rn|共同研究者:中村 雅人、孔 昌一、船造 俊孝、影井 清一郎  2009.3 

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  • ポリエチレンナフタレートの熱水解重合反応に及ぼす添加アルカリ種の比較

    荒井 理沙, 由井 和子

    化学工学会第74年会(横浜)|rn|共同研究者:荒井 理沙、由井 和子、船造 俊孝  2009.3 

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  • Relationship Between the Critical Anomaly of the Solute Diffusion Coefficient in Supercritical CO2 and the Local and Long Range Density Augmentation Evaluated from the Kirkwood-Buff's Fluctuation Theory

    ISSF2009, The 12th International Conference on Supercritical Fluids (Arcachon)  2009 

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  • Dynamic light scattering studies on the diffusion of nano particles in CO2 expanded organic liquids

    ISSF2009, The 12th International Conference on Supercritical Fluids (Arcachon)  2009 

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  • Predictive Correlation for Binary Diffusion Coefficients of Lipids in Supercritical Carbon Dioxide

    ISSF2009, The 12th International Conference on Supercritical Fluids (Arcachon)  2009 

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  • Measurements of Binary Diffusion Coefficients for Ferrocenes in Supercritical Carbon Dioxide

    ISSF2009 The 12th International Conference on Supercritical Fluids (Arcachon)  2009 

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  • Hydrothermal Conversions of Polycarbonate and Polyethylene Naphthalate into Monomers in the Presence of Ammonia

    ICMAT2009, International Conference on Materials for Advanced Technologies 2009(Singapore)  2009 

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  • Measurements of binary diffusion coefficients for organometallic compounds in organic solvents by the Taylor dispersion method

    MTMS2009, The 5th International Conference on Molecular Thermodynamics & Molecular Simulation  2009 

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  • Molecular dynamics simulation on the hydration and ion pair association of NaCl in supercritical water

    MTMS2009 The 5th International Conference on Molecular Thermodynamics & Molecular Simulation  2009 

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  • Using chromatographic impulse response technique to determine diffusion coefficients of metal complexes at infinite dilution in supercritical carbon dioxide

    MTMS2009 The 5th International Conference on Molecular Thermodynamics & Molecular Simulation  2009 

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  • Hydrothermal Dilute Alkali Solution as Novel Hydrolysis Medium in Depolymerization of Polyesters

    Super Green 2009, The 6th International Conference on Supercritical Fluids  2009 

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  • Hydrothermal Degradation of Starch Loaded at High Concentration

    Super Green 2009, The 6th International Conference on Supercritical Fluids  2009 

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  • Direct Observation of Depolymerization Reaction of Polycarbonate

    Super Green 2009 The 6th International Conference on Supercritical Fluids  2009 

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  • Reaction kinetics of hydrothermal depolymerization of poly(ethylene terephthalate), poly(ethylene naphthalate), and polycarbonate with aqueous ammonia solution

    Risa, Arai, Kentaro Zenda, Kohei Hatakeyama, Kazuko Yui, Toshitaka Funazukuri

    The 20th International Symposium on Chemical Reaction Engineering (ISCRE 20)/The organizing committe of the 20th International Syposium on Chemical Reaction Engineering  2008.9 

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  • Dilute aqueous ammonia solution under hydrothermal conditions as a green reaction medium in chemical recycling of polycarbonate

    Kohei Hatakeyama, Kazuko Yui, Toshitaka Funazukuri

    ISHA2008, International Conference on Solvothermal and Hydrothermal Reactions  2008.9 

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  • Effects of cellulose types on hydrothermal saccharification of cellulose

    Yuki Asaoka, Toshitaka Funazukuri

    ISHA2008, International Conference on Solvothermal and Hydrothermal Reactions/ISHA (International Solvothermal and Hydrothermal Association)  2008.9 

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  • Diffusion coefficients of nano particles in CO2 expanded liquids

    Kazuko Yui, Naoshi Yoshida, Yusuke Sawamura, Toshitaka Funazukuri

    ISHA2008 (International Conference on Solvothermal and Hydrothermal Reactions)/ISHA (International Solvothermal and Hydrothermal Association)  2008.9 

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  • アンモニア熱水を用いたポリカーボネートの解重合反応機構

    笹井裕也, 松山公亮, 畠山康平, 船造俊孝, 古屋武

    化学工学会第40回秋季大会|rn|共同研究者:笹井裕也、松山公亮、畠山康平、船造俊孝、古屋武  2008.9 

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  • 塩基性熱水によるポリエチレンナフタレートの解重合反応速度

    荒井理沙, 由井和子, 船造俊孝

    化学工学会第40回秋季大会|rn|共同研究者:荒井理沙、由井和子、船造俊孝  2008.9 

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  • 稀薄酸水溶液を用いたセルロースの熱水加水分解

    浅岡祐輝, 船造俊孝

    化学工学会第40回秋季大会|rn|共同研究者:浅岡祐輝、船造俊孝  2008.9 

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  • 水-無機ガス二成分系超臨界流体の構造の分子動力学計算

    由井和子, 船造俊孝, 幸田清一郎

    化学工学会第40回秋季大会|rn|共同研究者:由井和子、船造俊孝、幸田清一郎  2008.9 

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  • 分子動力学計算による高温高圧水中の無機塩の会合定数とミクロ構造

    佐久間正樹, 由井和子, 船造俊孝, 幸田清一郎

    化学工学会第40回秋季大会|rn|共同研究者:佐久間正樹、由井和子、船造俊孝、幸田清一郎  2008.9 

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  • 分子動力学法によるメタノール+CO2ガス膨張液体中の溶質の拡散係数計算

    鳥海秀, 由井和子, 船造俊孝

    化学工学会第40回秋季大会|rn|共同研究者:鳥海秀、由井和子、船造俊孝  2008.9 

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  • 超臨界二酸化炭素中における相互拡散係数に及ぼす溶質分子形状の影響

    鳥海秀, 由井和子, 船造俊孝, 孔昌一, 影井清一郎

    化学工学会第40回秋季大会|rn|共同研究者:鳥海秀、由井和子、船造俊孝、孔昌一、影井清一郎  2008.9 

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  • 高濃度デンプンの熱水糖化

    新井克大, 船造俊孝

    化学工学会第40回秋季大会  2008.9 

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  • 熱水条件下におけるポリカーボネート解重合反応に及ぼすアンモニアの添加効果

    畠山康平, 船造俊孝

    化学工学会73年会,化学工学会  2008.3 

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  • Langmuir型吸着のあるキャピラリーカラムを用いた拡散係数の推算II

    影井清一郎, 孔昌一, 船造俊孝

    化学工学会第73年会,化学工学会  2008.3 

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  • 動的光散乱法によるガス膨張液体中の微粒子の拡散係数測定

    吉田直司, 由井和子, 船造俊孝

    化学工学会第73年会,化学工学会  2008.3 

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  • 臨界点近傍における二酸化炭素中のベンゼンの拡散係数

    孔昌一, 影井清一郎, 船造俊孝

    化学工学会第73年会,化学工学会  2008.3 

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  • アセトニトリル+n-オクタン系の硫黄化合物分配係数のNRTL式による相関

    石川哲也, 船造俊孝, 竹林良浩, 依田智, 古屋武, 下山裕介

    化学工学会第73年会,化学工学会  2008.3 

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  • 水中のアミノ酸の拡散係数の濃度依存性の測定

    渡辺泉, 由井和子, 船造俊孝

    化学工学会第73年会,化学工学会  2008.3 

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  • Reaction kinetics of hydrothermal depolymerization of poly(ethylene terephthalate), poly(ethylene naphthalate), and polycarbonate with aqueous ammonia solution

    The 20th International Symposium on Chemical Reaction Engineering (ISCRE 20)/The organizing committe of the 20th International Syposium on Chemical Reaction Engineering  2008 

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  • Dilute aqueous ammonia solution under hydrothermal conditions as a green reaction medium in chemical recycling of polycarbonate

    ISHA2008, International Conference on Solvothermal and Hydrothermal Reactions  2008 

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  • Effects of cellulose types on hydrothermal saccharification of cellulose

    ISHA2008, International Conference on Solvothermal and Hydrothermal Reactions/ISHA (International Solvothermal and Hydrothermal Association)  2008 

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  • Diffusion coefficients of nano particles in CO2 expanded liquids

    ISHA2008 (International Conference on Solvothermal and Hydrothermal Reactions)/ISHA (International Solvothermal and Hydrothermal Association)  2008 

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  • Hydrothermal depolymerization of poly(ethylene terephthalate), poly(ethylene naphthalate), and polycarbonate with aqueous ammonia solution

    Kentaro Zenda, Kohei Hatakeyama, Risa Arai, Toshitaka Funazukuri

    Super Green 2007, The 5th International Symposium on Supercritical Fluids/Asian Society of Supercritical Fluids  2007.11 

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  • Hydrothermal degradation of poly(vinyl chloride) with aqueous ammonia solution

    Koichiro Hashimoto, Shinpei Abe, Yuya Sasai, Toshitaka Funazukuri

    Super Green 2007, The 5th International Symposium on Supercritical Fluids/Asian Society of Supercritical Fluids  2007.11 

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  • 超臨界流体から液体中における自己および相互拡散係数のHydrodynamic式による相関

    船造俊孝, 孔昌一, 影井清一郎

    第48回高圧討論会,日本高圧力学会  2007.11 

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  • 超臨界二酸化炭素中の相互拡散係数測定における非線形吸着等温式を用いた解析

    孔昌一, 影井清一郎, 船造俊孝

    第48回高圧討論会,日本高圧力学会  2007.11 

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  • アルカリ性熱水によるポリエチレンナフタレートの解重合

    荒井理沙, 船造俊孝

    化学工学会第39回秋季大会,化学工学会  2007.9 

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  • Langmuir型吸着のあるキャピラリーカラムを用いた拡散係数の推算

    大宜見菊野, 孔昌一, 影井清一郎, 船造俊孝

    化学工学会第39回秋季大会,化学工学会  2007.9 

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  • 熱水によるローカストビーンガムの加水分解

    石井達夫, 宮澤哲也, 味園隼人, 船造俊孝

    化学工学会第39回秋季大会,化学工学会  2007.9 

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  • 熱水を用いた各種セルロースの低分子化

    浅岡祐輝, 船造俊孝

    化学工学会39回秋季大会,化学工学会  2007.9 

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  • 熱水中におけるポリ乳酸の解重合

    八木橋 将, 船造俊孝

    化学工学会第39回秋季大会,化学工学会  2007.9 

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  • アルカリ性熱水によるポリエチレンテレフタレートの解重合速度

    善田健太郎, 船造俊孝

    化学工学会第39回秋季大会,化学工学会  2007.9 

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  • 塩基性熱水によるポリカーボネートの解重合

    畠山康平, 船造俊孝

    化学工学会第39回秋季大会,化学工学会  2007.9 

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  • アルカリ性熱水によるPVCからの脱塩素

    阿部新平, 橋本浩一郎, 船造俊孝

    化学工学会第39回秋季大会,化学工学会  2007.9 

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  • Reproduction of peaks distorted and tailing in supercritical fluid chromatography with capillary column

    C. Y. Kong, T. Funazukuri, S. Kagei

    The 30th International Symposium on Capillary Chromatography, Dalian, China  2007.6 

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  • Predictive Correlation of Binary Diffusion and Self-Diffusion Coefficients in Supercritical and Liquid Fluids

    T. Funazukuri, C. Y. Kong, S. Kagei

    The 5th International Symposium on High Pressure Processes Technology and Chemical Engineering, Segovia, Spain  2007.6 

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  • 超臨界二酸化炭素中における12-crown-4と15-crown-5の拡散係数の測定

    孔昌一, 趙潮湧, 影井清一郎, 船造俊孝

    化学工学会第72年会,化学工学会  2007.3 

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  • 超臨界領域から液体領域における拡散係数の相関

    船造俊孝, 孔昌一, 影井清一郎

    化学工学会第72年会,化学工学会  2007.3 

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  • アルカリ添加熱水によるPVCの脱塩素化速度

    橋本浩一郎, 須賀昭二, 若山豊, 船造俊孝

    化学工学会第72年会,化学工学会  2007.3 

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  • アルカリ性熱水を用いたポリエチレンテレフタレート(PET)のモノマー化

    善田健太郎, 船造俊孝

    化学工学会第72年会,化学工学会  2007.3 

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