MODELS AND PHYSICAL REALITY IN ION-EXCHANGE KINETICS

被引:38
作者
HELFFERICH, FG
机构
[1] Department of Chemical Engineering, The Pennsylvania State University, University Park
来源
REACTIVE POLYMERS | 1990年 / 13卷 / 1-2期
关键词
D O I
10.1016/0923-1137(90)90053-7
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Four cases of ion-exchange kinetics are pointed out in which premises of a mathematical model are incompatible with facets of physical reality. The cases are (1) calculation of nonlinear gradients in an unstirred Nernst "film", (2) shell-core models in the absence of a mechanism that can produce shell-core behavior, (3) reaction-controlled shell-core models, and (4) models for macroporous beads in which the wrong diffusion step becomes rate-controlling. © 1990.
引用
收藏
页码:191 / 194
页数:4
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