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1997 Fiscal Year Final Research Report Summary

Mass transfer in supercritical fluids related to the solute-solvent interactions

Research Project

Project/Area Number 08650888
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 化学工学一般
Research InstitutionCHUO UNIVERSITY (1997)
Yokohama National University (1996)

Principal Investigator

FUNAZUKURI Toshitaka  Chuo University, Faculty of Science and Engineering Dept of Applied Chemistry Associate professor, 理工学部, 助教授 (60165454)

Project Period (FY) 1996 – 1997
KeywordsSupercritical / Interaction / Diffusion coefficients / Taylor dispersion / FTIR / Packed beds
Research Abstract

The following results were obtained for the four research topics studied in this project :
(1) Infinite dilution binary diffusion coefficients of acetone and benzene in supercritical carbon dioxide were measured by the Taylor dispersion method in the near critical region. The anomaly of the diffusion coefficients in the near critical point was observed. The diffusion coefficients were expressed with the background diffusivity and the excess diffusivity showing the anomaly.
(2) Effective axial dispersion coefficients in packed beds were measured under supercritical conditions of carbon dioxide and at atmospheric pressure of organic solvents : hexane, cyclohexane and dodecane. The dispersion coefficients were correlated with a function of particle Reynolds number, Schmidt number, bed void fraction and molecular diffusivity. The correlation was consistent for all solvents, irrespective of pressure.
(3) The possible clustering of molecules due to solute-solvent and/or solute-solute interaction was observed with FTIR spectroscopy for the mixtures of carbon dioxide and acetone under supercritical conditions. The condition showing the clustering was consistent with that appearing the anomaly of the diffusion coefficient.
(4) The reaction rate constants of hydrolysis and pyrolysis were determined for the decomposition of dibenzyl ether in supercritical water. The hydrolysis rate constants agreed with the correlation of the rate constant with the dielectric constant of water obtained by Townsend et al. (1998). The pyrolysis rate constants determined were found to be consistent with the literature values, and be irrespective of atmosphere.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] T. Funazukuri: "Tracer diffusion coefficients of benzene in dense CO_2 at 313.2K and 8.5-30MPa" Fluid Phase Equilibria. 125. 235-243 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Funazukuri: "Effective axial dispersion coefficients in packed beds under supercritical conditions" Proc. of the 4th International symposium on Supercritical Fluids. 5-8 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Funazukuri: "FTIR spectra of acetone in sub-and supercritical CO_2 in the near-critical region" Prof. of the 4th International symposium on supercritical Fluids. 671-674 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Funazukuri: "Rate of dibenzyl ether decomposition in supercritical water" Fuel. 76. 865-870 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Funazukuri: "Effective axil dispersion coefficients in packed beds under sipercritical conditions" J. of Supercritical Fluids. 印刷中. (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Funazukuri, and N.Nishimoto: "Tracer diffusion coefficients of benzene in dense CO_2 at 313.2K and 8.5-30 MPa" Fluid Phase Equilibria. 125. 235-243 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Funazukuri, R.M.Serikawa and K.Yamaura: "Rate of dibenzyl ether decomposition in supercritical water" Fuel. 76. 865-870 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Funazukuri, C.Y.Kong, and S.Kagei: "Effective axial dispersion coefficients in packed beds under supercritical conditions" J.of the Supercritical Fluids. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Funazukuri, C.Y.Kong, and S.Kagei: "Measurements of binary diffusion coefficients of acetone in supercritical CO_2" J.of Chemical Engineering Data. (submitted).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Funazukuri and Y.Ikushima: "FTIR spectra of acetone in sub-and supercritical CO_2 in the near-critical region" Proc.of the 4^<th> International Symposium on Supercritical Fluids. May 11-14, Sendai. 671-674 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Funazukuri, C.Y.Kong, and S.kagei: "Effective axial dispersion coefficients in packed beds under supercritical conditions" Proc.of the 4^<th> International Symposium on Supercritical Fluids. May 11-14, Sendai. 5-8 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Funazukuri, C.Y.Kong and S.Kagei: "Binary diffusion coefficients of acetone in the near critical region" Presented at the AIChE 1998 Spring Meeting, New Orleans. March 8-12. (1998)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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