Density of he adsorbed in micropores at 4.2K

被引：16
|
作者：
Setoyama, N [1 ]
Kaneko, K [1 ]
机构：
[1] CHIBA UNIV,FAC SCI,DEPT CHEM,INAGE,CHIBA 263,JAPAN
来源：
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY | 1995年 / 1卷 / 02期
关键词：
He adsorption; micropore; ultramicroporosity; N-2; adsorption; zeolite;
D O I：
10.1007/BF00705003
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：
The density of He adsorbed in the cylindrical micropores of zeolites NaY and KL has been determined by He adsorption at 4.2K. He adsorption isotherms were then compared with N-2 adsorption isotherms at 77K. Crystallographic considerations of the micropore volumes gave the density of the He adsorbed layer, which is necessary for assessment of ultramicroporosity of less-crystalline microporous solids, such as activated carbons. The determined density of He adsorbed in the cylindrical micropores of the zeolite was in the range 0.22 to 0.26 gml(-1), greater than that of He adsorbed on a flat surface (0.202 gml(-1)). A value for the density of He between 0.20 to 0.22 gml(-1) is recommended for evaluation of ultramicroporosity of a slit-shaped microporous system such as activated carbon.
引用
收藏
页码：165 / 173
页数：9
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