ON THE THERMODYNAMIC FACTORS GOVERNING THE ADSORPTION OF P-XYLENE AND M-XYLENE ONTO FAUJASITE ZEOLITE CONTAINING NA+ AND K+ CATIONS

被引：18

作者：

GUTH, JL ^{[1
]}

JACQUES, P ^{[1
]}

STOESSEL, F ^{[1
]}

WEY, R ^{[1
]}

机构：

[1] ECOLE NATL SUPER CHIM, PHOTOCHIM GEN LAB, CNRS, EQUIPE RECH, F-68093 MULHOUSE, FRANCE

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1980年 / 76卷 / 02期

关键词：

Isomers - Zeolites - Spectroscopic analysis - Enthalpy - Xylene - Adsorption - Entropy;

D O I：

10.1016/0021-9797(80)90373-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A partly hydrated faujasite zeolite can selectively adsorb p- or m-xylene from a mixture of both isomers according to the nature of its cations (Na+ or K+). Microcalorimetric and Raman laser spectroscopic studies of the adsorption interactions enable us to explain the observed selectivity. The Na+ faujasite selectivity for m-xylene is due to the difference in enthalpy of adsorption in favor of m-xylene which is not compensated by the difference in entropy of adsorption, the latter in favor of p-xylene. With K+ faujasite the difference in enthalpy of adsorption is not great enough and it is now the difference in entropy of adsorption, always favoring p-xylene, which determines the selectivity. © 1980 by Academic Press, Inc.

引用

页码：298 / 304

页数：7

共 44 条

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