The influence of association of alcohol molecules on their adsorption and desorption heats

被引：0
|
作者：
Dawidowicz, AL [1 ]
Wianowska, D [1 ]
机构：
[1] Marie Curie Sklodowska Univ, Fac Chem, PL-20031 Lublin, Poland
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2003年 / 225卷 / 1-3期
关键词：
flow microcalorimetry; adsorption heats; desorption heats; alcohol association; alcohol adsorption; CPG;
D O I：
10.1016/S0927-7757(03)00349-2
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 paper presents the results of calorimetric measurements and surface excess adsorption isotherms for adsorption process of n-butanol from n-hexane on controlled porosity glasses of different mean pore diameters. The pore diameter was found to have very small effect on the adsorption heat, while it affects the desorption heat recorded by the flow microcalorimeter. Moreover, in the region of very low alcohol concentration in solution, the heat of adsorption exhibits sharp maximum for both narrow and wide pore diameters. This rather puzzling result is attributed to the effect of molecular association of alcohol molecules in the solution. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：105 / 110
页数：6
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