Adsorption of aromatics in zeolites ZSM-5: A thermodynamic-calorimetric study based on the model of adsorption on heterogeneous adsorption sites?

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Title:	Adsorption of aromatics in zeolites ZSM-5: A thermodynamic-calorimetric study based on the model of adsorption on heterogeneous adsorption sites?
Authors:	Rudzinski,W;NarkiewiczMichalek,J;Szabelski,P;Chiang,AST
Contributors:	化學工程與材料工程學系
Keywords:	PARA-XYLENE;POWDER DIFFRACTION;FRAMEWORK SYMMETRY;SHAPE SELECTIVITY;MOLECULAR-SIEVE;BENZENE SYSTEM;P-XYLENE;MAS NMR;SILICALITE;SORPTION
Date:	1997
Issue Date:	2010-06-29 17:30:21 (UTC+8)
Publisher:	中央大學
Abstract:	On the basis of new experimental and theoretical findings, a revised version of the three-site model of collective localized adsorption, proposed originally by Lee and Chiang, is presented. Following the new findings, it is assumed, that benzene molecules filling channel intersections may be adsorbed in two different configurational states. That model leads to predicting, for the first time, the two steps observed on the isotherms of benzene adsorption at higher temperatures. The steps are due to cooperative redistributions of molecules adsorbed on various sites. That; model allows also. obtaining a quantitative simultaneous fit of both adsorption isotherms and the corresponding isosteric heats of adsorption. The estimated parameters of gas-solid interactions on various sites increase in the sequence predicted by computer simulations of one molecule adsorption.
Relation:	LANGMUIR
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] journal & Dissertation

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