Mutual diffusion coefficients of concentrated 1:1 electrolyte from the modified mean spherical approximation

被引：9
|
作者：
Gao, Guang-Hua [1 ]
Shi, Hong-Bing [1 ]
Yu, Yang-Xin [1 ]
机构：
[1] Tsing Hua Univ, Dept Chem Engn, Beijing 100084, Peoples R China
来源：
FLUID PHASE EQUILIBRIA | 2007年 / 256卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
mutual diffusion coefficient; electrolyte solution; MSA;
D O I：
10.1016/j.fluid.2006.11.017
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Mutual diffusion coefficients of concentrated 1: 1 electrolyte solutions are investigated using a modified mean spherical approximation (MSA), in which the effective cationic diameter is a function of total ionic strength. We apply this improved MSA to calculate the equilibrium pair correlation function, and the Smoluchowski equation is used for the dynamics. We compare the calculated mutual diffusion coefficients of 18 uni-valence electrolyte solutions for molar concentrations up to 4.0 mol/L known experimental data. Good agreement between theoretical results and the experimental mutual diffusion coefficients are found for all the cases studied. (c) 2006 Elsevier B.V. All rights reserved.
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页码：105 / 111
页数：7
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