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

超临界流体中与溶质-溶剂相互作用相关的传质

基本信息

项目摘要

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.
(1)在近临界区用Taylor色散法测定了丙酮和苯在超临界CO2中的无限稀释二元扩散系数。在临界点附近,扩散系数出现了反常现象。扩散系数用背景扩散系数和显示异常的过量扩散系数表示。(2)在超临界二氧化碳和常压下测定了正己烷、环己烷和十二烷三种有机溶剂在填充床中的有效轴向分散系数。分散系数与颗粒雷诺数、施密特数、床层空隙率和分子扩散系数的函数相关。无论压力如何,所有溶剂的相关性都是一致的。(3)在超临界条件下,二氧化碳和丙酮的混合物的FTIR光谱观察到由于溶质-溶剂和/或溶质-溶质相互作用的分子的可能的集群。出现聚集的条件与扩散系数出现异常的条件一致。(4)测定了二苄基醚在超临界水中的水解和热解反应速率常数。水解速率常数与汤森等人(1998)获得的速率常数与水介电常数的相关性一致。热解速率常数的测定被认为是与文献值一致,并与气氛无关。

项目成果

期刊论文数量(20)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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)
T.Funazukuri、C.Y.Kong 和 S.kagei:“超临界条件下填充床中的有效轴向扩散系数”第四届国际超临界流体研讨会论文集。
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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)
T.Funazukuri 和 N.Nishimoto:“313.2K 和 8.5-30 MPa 下稠密 CO_2 中苯的示踪扩散系数”流体相平衡。
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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)
T.Funazukuri、C.Y.Kong 和 S.Kagei:“近临界区域丙酮的二元扩散系数”在新奥尔良 AIChE 1998 年春季会议上发表。
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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)
T. Funazukuri:“313.2K和8.5-30MPa下稠密CO_2中苯的示踪扩散系数”流体相平衡。
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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).
T.Funazukuri、C.Y.Kong 和 S.Kagei:“超临界条件下填充床中的有效轴向扩散系数”J.of the Superritic Fluids。
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FUNAZUKURI Toshitaka其他文献

FUNAZUKURI Toshitaka的其他文献

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{{ truncateString('FUNAZUKURI Toshitaka', 18)}}的其他基金

Development of zero-emission process with ammonia
开发氨零排放工艺
  • 批准号:
    23651075
  • 财政年份:
    2011
  • 资助金额:
    $ 1.34万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Diffusion coefficients of elemental compounds in various atmospheres
元素化合物在各种气氛中的扩散系数
  • 批准号:
    22360325
  • 财政年份:
    2010
  • 资助金额:
    $ 1.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Measurement and correlation of diffusion coefficients in gas expanded liquids
气体膨胀液体中扩散系数的测量和相关性
  • 批准号:
    18560725
  • 财政年份:
    2006
  • 资助金额:
    $ 1.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Measurements and Correlation for Diffusion Coefficients for Large Molecules in Non-organic Solvents
无机溶剂中大分子扩散系数的测量和关联
  • 批准号:
    15560658
  • 财政年份:
    2003
  • 资助金额:
    $ 1.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)

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