Correlation of binary diffusion coefficients of organic substances in supercritical carbon dioxide based on equations of state

被引：6

作者：

Kraska, T. ^{[1
]}

Quinones-Cisneros, S. E. ^{[1
]}

Deiters, U. K. ^{[1
]}

机构：

[1] Univ Cologne, Inst Phys Chem, D-50939 Cologne, Germany

来源：

JOURNAL OF SUPERCRITICAL FLUIDS | 2007年 / 42卷 / 02期

关键词：

infinite dilution diffusion coefficient; carbon dioxide; viscosity; equation of state;

D O I：

10.1016/j.supflu.2007.03.003

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An easy applicable and accurate method for the correlation of the infinite dilution diffusion coefficient of organic solutes in supercrifical fluids is proposed. The method is applicable to all supercritical fluids; in this work, however, only supercritical carbon dioxide is considered. The infinite dilution diffusion coefficient is calculated from the solvent viscosity by means of a modified Stokes-Einstein relation. The viscosity is calculated from an equation of state using friction theory. Here two equations of state are used, namely the short form of the Span-Wagner reference equation for carbon dioxide and the Peng-Robinson equation of state. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：212 / 218

页数：7

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