A NEW APPROACH TO ANALYSIS OF MULTILAYER ADSORPTION

被引:58
作者
ARANOVICH, GL [1 ]
DONOHUE, MD [1 ]
机构
[1] JOHNS HOPKINS UNIV,DEPT CHEM ENGN,BALTIMORE,MD 21218
关键词
D O I
10.1006/jcis.1995.1353
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
A new approach to the analysis of vapor adsorption on solids is proposed. In this method the adsorption isotherm is represented as a(p) = f(p)/(1-p/p(s))(d) where a(p) is the amount of vapor adsorbed, p is the pressure, p(s) is the saturation vapor pressure, f(p) is a function describing the adsorption in the first molecular layer, and d is an adjustable parameter. This model allows one to determine the specific surface area of disperse and porous materials in a way that is not limited by the functional form of the monolayer adsorption isotherm, f(p). In addition, this equation gives a new way to correlate adsorption data over the whole range of p/p(s). Comparison is made with experimental data for the systems Ar-KCl, N-2-KCl, O-2-KCl, N-2-SiO2, and N-2-Al2O3. (C) 1995 Academic Press, Inc.
引用
收藏
页码:515 / 520
页数:6
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