Adsorption of supercritical fluids in non-porous and porous carbons: analysis of adsorbed phase volume and density
Adsorption of supercritical fluids in non-porous and porous carbons: analysis of adsorbed phase volume and density
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DOI：
10.1016/s0008-6223(03)00152-0
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发表时间：
2003-01-01
期刊：
影响因子：
10.9
通讯作者：
Do, HD
中科院分区：
文献类型：
--
作者：
Do, DD;Do, HD
本文回顾了吸附研究中的表面质量过剩，考察了吸附相体积及其密度在分析超临界气体在无孔和微孔固体中吸附时的作用。对于在不同碳质固体上测试的许多超临界流体(氪、Ar、氮、甲烷)，发现吸附相的体积主要限制在厚度可达几个分子直径的几何体积内。在高压下，吸附相密度也非常接近，但绝不等于或大于液体相密度。(C)2003爱思唯尔科学有限公司。保留所有权利。
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.