Features of the adsorption of hydrogen by various types of microporous materials

被引：0
作者：
P. S. Yaremov
V. G. Il’in
机构：
[1] National Academy of Sciences of Ukraine,L. V. Pisarzhevskii Institute of Physical Chemistry
来源：
Theoretical and Experimental Chemistry | 2008年 / 44卷
关键词：
hydrogen adsorption; adsorption isotherms; zeolites; channel and “cavity” structure; carbon materials; specific adsorption;
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摘要：
A comparative investigation was made of the adsorption of N2 and H2 by silicate and phosphate zeolites (Zt) and carbon materials with micropores of various dimensions, shapes, and volumes. It was found that the adsorption of hydrogen has significant sensitivity to the shape of the pores, the chemical composition of the zeolite framework, and the nature of the surface of the adsorbents. In particular, the adsorption is increased in the presence of constrictions (the cationic forms of zeolite LTA) or channels (MFI) with sizes close to hydrogen molecules in the micropores and the ions of divalent metals included isomorphously in the framework of the aluminophosphates. There is also increased affinity to the carbon surface.
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