Organophilicity of MCM-41 adsorbents studied by adsorption and temperature-programmed desorption

被引：64
|
作者：
Zhao, XS
Lu, GQ [1 ]
Hu, X
机构：
[1] Univ Queensland, Dept Chem Engn, St Lucia, Qld 4072, Australia
[2] Hong Kong Univ Sci & Technol, Dept Chem Engn, Kowloon, Hong Kong, Peoples R China
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2001年 / 179卷 / 2-3期
基金：
澳大利亚研究理事会;
关键词：
MCM-41; organophilicity; adsorption; TPD; VOCs;
D O I：
10.1016/S0927-7757(00)00646-4
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：
In this paper, the organophilic property of MCM-41 was studied and compared with hydrophobic silicalite-l using adsorption and temperature-programmed desorption (TPD) methods. The surface heterogeneity of MCM-41 was evaluated in terms of activation energy for desorption (E-d) and isosteric heat of adsorption (q(st)). Results show that MCM-41 has a higher affinity to polar organic compounds than to non-polar organics while silicalite-l has a higher affinity to non-polar organic compounds than to polar organics. This organophilic behaviour of MCM-41 is attributed to its surface heterogeneity. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：261 / 269
页数：9
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