Adsorption of supercritical fluids in non-porous and porous carbons: analysis of adsorbed phase volume and density

被引：163

作者：

Do, DD ^{[1
]}

Do, HD ^{[1
]}

机构：

[1] Univ Queensland, Dept Chem Engn, St Lucia, Qld 4072, Australia

来源：

CARBON | 2003年 / 41卷 / 09期

基金：

澳大利亚研究理事会;

关键词：

activated carbon; carbon black; porous carbon; adsorption; modeling;

D O I：

10.1016/S0008-6223(03)00152-0

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, we revisit the surface mass excess in adsorption studies and investigate the role of the volume of the adsorbed phase and its density in the analysis of supercritical gas adsorption in non-porous as well as microporous solids. For many supercritical fluids tested (krypton, argon, nitrogen, methane) on many different carbonaceous solids, it is found that the volume of the adsorbed phase is confined mostly to a geometrical volume having a thickness of up to a few molecular diameters. At high pressure the adsorbed phase density is also found to be very close to but never equal or greater than the liquid phase density. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：1777 / 1791

页数：15

共 49 条

[1] MODELING OF SUPERCRITICAL DESORBERS WITH AN EQUATION-OF-STATE-BASED ISOTHERM [J].