KINETIC MECHANISMS IN ION-EXCHANGE PROCESSES

被引：20

作者：

FERNANDEZ, A ^{[1
]}

DIAZ, M ^{[1
]}

RODRIGUES, A ^{[1
]}

机构：

[1] UNIV PORTO, DEPT CHEM ENGN, P-4099 OPORTO, PORTUGAL

来源：

CHEMICAL ENGINEERING JOURNAL AND THE BIOCHEMICAL ENGINEERING JOURNAL | 1995年 / 57卷 / 01期

关键词：

D O I：

10.1016/0923-0467(94)02865-8

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The kinetic mechanisms for cationic and chelating ion exchange were investigated. The applicability of kinetic equations to fit experimental results was demonstrated using the pore diffusion and unreacted core models and two different experimental systems: K+ -Na+ in sulphonic resins and metal-Na+ in iminodiacetic chelating resins. Microscopic observations of intraparticle profiles in the case of metal-Na+ exchange show that the unreacted-core model is adequate for describing such a process, allowing the calculation of intraparticle diffusivities.

引用

页码：17 / 25

页数：9

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