期刊
CARBON
卷 41, 期 9, 页码 1777-1791出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0008-6223(03)00152-0
关键词
activated carbon, carbon black, porous carbon; adsorption, modeling
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.
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