Initial heats of H2S adsorption on activated carbons:: Effect of surface features

被引：22
|
作者：
Bagreev, A
Adib, F
Bandosz, TJ [1 ]
机构：
[1] CUNY City Coll, Grad Sch, Dept Chem, New York, NY 10021 USA
[2] CUNY City Coll, Ctr Water Resources & Environm Res, New York, NY 10031 USA
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1999年 / 219卷 / 02期
关键词：
activated carbons; inverse gas chromatography; hydrogen sulfide; porosity; heat of adsorption;
D O I：
10.1006/jcis.1999.6485
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 sorption of hydrogen sulfide was studied on activated carbons of various origins by means of inverse gas chromatography at infinite dilution. The conditions of the experiment were dry and anaerobic. Prior to the experiments the surface of some carbon samples was oxidized using either nitric acid or ammonium persulfate. Then the structural parameters of carbons were evaluated from the sorption of nitrogen. From the IGC experiments at various temperatures, heats of adsorption were calculated. The results showed that the heat of H2S adsorption under dry anaerobic conditions does not depend on surface chemistry. The dependence of the heat of adsorption on the characteristic energy of nitrogen adsorption calculated from the Dubinin-Raduskevich equation was found. This correlation can be used to predict the heat of H2S adsorption based on the results obtained from nitrogen adsorption. (C) 1999 Academic Press.
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收藏
页码：327 / 332
页数：6
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