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《中国化学工程学报(英文版)》 2001-01
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A Mathematical Method for Determination of Absolute Adsorption from Experimental Isotherms of Supercritical Gases

ZHOU Li ZHOU YapingHydrogen Energy Research CenterDepartment of Chemistry, Tianjin University, Tianjin 300072, China  
A mathematical method was proposed for the determination of absolute adsorption from experimental isotherms. The method is based on the numerical equality of the absolute and the excess adsorption when either the gas phase density or the amount adsorbed is not quite considerable. The initial part of the experimental isotherms, which represents the absolute adsorption, became linear with some mathematical manipulations. The linear isotherms were reliably formulated. As consequence, either the volume or the density of the supercritical adsorbate could be determined by a non-empirical way. This method was illustrated by the adsorption data of supercritical hydrogen and methane on a superactivated carbon in large ranges of temperature and pressure.
【Fund】: the National Natural Science Foundation of China (No. 29936100).
【CateGory Index】: O647.3
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