Liquid adsorption and immersion of two alcohol-water mixtures on carbon molecular sieves

被引：4

作者：

Klauck, Mandy ^{[1
]}

Guhlmann, Jonas ^{[1
]}

Haehnel, Thomas ^{[1
]}

Hauser, Matthias ^{[1
]}

Kalies, Grit ^{[1
]}

机构：

[1] HTW Univ Appl Sci Dresden, Chem Engn, 1 Friedrich List Pl, D-01069 Dresden, Germany

来源：

ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY | 2022年 / 28卷 / 3-4期

关键词：

Adsorption; Immersion; Water; Alcohol; Binary liquid mixture; Separation diagram; Carbon molecular sieve; PHASE ADSORPTION; BINARY-MIXTURES; ENTHALPIES; ISOTHERMS; DIAGRAMS; SYSTEMS;

D O I：

10.1007/s10450-022-00359-7

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 adsorption excess isotherms of ethanol-water and propanol-water mixtures are studied on a series of carbon molecular sieves with well-separated micro- and mesoporosity at 298.15 K. The preferential adsorption of one component from a mixture is measured by using vibration densitometry for the concentration analysis. Microcalorimetrically measured enthalpies, which are released upon immersion of the carbon materials in the binary mixtures, complement the adsorption excess data. It is shown that (i) density measurements are well applicable for studying liquid-phase adsorption, (ii) liquid-adsorption isotherms are sensitive to smallest chain length differences of the adsorptives, (iii) the calculated separation diagrams depend strongly on the assumptions about the adsorbed phase, and (iv) the combined determination of gas, vapor and liquid adsorption isotherms and immersion enthalpies offers advantages for the analysis of complex adsorption systems.

引用

页码：137 / 147

页数：11