Synthesis and adsorption investigations of zeolites MCM-22 and MCM-49 modified by alkali metal cations

被引：4
|
作者：
Justyna Pawlesa
Arnošt Zukal
Jiří Čejka
机构：
[1] J. Heyrovský Institute of Physical Chemistry of ASCR v.v.i.,
来源：
Adsorption | 2007年 / 13卷
关键词：
MCM-22 zeolite; MCM-49 zeolite; Alkali metal cation exchange; N; and CO; adsorption;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Ion exchange was made on MCM-22 and MCM-49 zeolites with different Si/Al molar ratios, with Li+, Na+, K+, and Cs+ ions and the study of the influence of alkali metal cations on CO2 adsorption properties was performed. The degree of ion-exchange decreased for larger cations (Cs+) apparently due to steric hindrances. The exchange with different cations led to a decrease in the surface area and the micropore volume. Our study shows that the adsorption capacity of the tested zeolites depends significantly on the nature and the concentration of the charge-compensating cations. The highest CO2 adsorption capacity was obtained on the MWW zeolites with the lowest Si/Al molar ratio and the Li+ or K+ cations.
引用
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页码：257 / 265
页数：8
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