MEMBRANE DIFFUSION-CONTROLLED KINETICS OF IONIC TRANSPORT

被引：28

作者：

HO, CC ^{[1
]}

JAN, DS ^{[1
]}

TSAI, FN ^{[1
]}

机构：

[1] NATL CHENG KUNG UNIV, DEPT CHEM ENGN, TAINAN 70101, TAIWAN

来源：

JOURNAL OF MEMBRANE SCIENCE | 1993年 / 81卷 / 03期

关键词：

CATION-EXCHANGE MEMBRANES; DONNAN DIALYSIS; NERNST-PLANCK EQUATION; MEMBRANE DIFFUSION CONTROL; ORTHOGONAL COLLOCATION;

D O I：

10.1016/0376-7388(93)85180-5

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A computer algorithm based on the Nernst-Planck equation has been developed for digital simulation of ionic transport in an ion exchange system with a membrane separating two electrolyte solutions. The Na+-H+ couple has been studied experimentally with a cation-exchange membrane to test the numerical algorithm. The optimum diffusion coefficients of the counter-ions are determined for the membrane diffusion controlled exchange rate. The measured external solution concentrations agree satisfactorily with the numerical results. This procedure allows the treatment of unsteady state transport through membranes and avoids the numerical instabilities which are frequently encountered in numerical methods.

引用

页码：287 / 294

页数：8

共 24 条

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