THE DETERMINATION OF ZEOLITE CRYSTAL DIFFUSIVITY BY GAS-CHROMATOGRAPHY .1. THEORETICAL

被引：43

作者：

CHIANG, AS ^{[1
]}

DIXON, AG ^{[1
]}

MA, YH ^{[1
]}

机构：

[1] WORCESTER POLYTECH INST,DEPT CHEM ENGN,WORCESTER,MA 01609

来源：

CHEMICAL ENGINEERING SCIENCE | 1984年 / 39卷 / 10期

关键词：

CRYSTALS - MATHEMATICAL MODELS;

D O I：

10.1016/0009-2509(84)80003-2

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A mathematical model is developed which describes the pulse response of a chromatographic column packed with crystal zeolite powder, thus allowing the crystal diffusivity to be determined independently of the pellet diffusivity which is present in more conventional beds. This continuum model allows for the effects of both pressure drop and dead volume in the apparatus. The first and second moments of the pulse response are derived and criteria are presented for the neglect of the dead volume terms in these moments, based on accurate estimation of the parameters. The model equations are solved numerically and simulations are presented to illustrate the pressure drop and dead volume effects.

引用

页码：1451 / 1459

页数：9

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