Heterogeneous three-site lattice model for adsorption of aromatics in ZSM-5 zeolites: temperature dependence of adsorption isotherms

J. Narkiewicz-Michałek, P. Szabelski, W. Rudziński, A. S.T. Chiang

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

The three-site lattice model of collective localized adsorption of aromatics in ZSM-5 zeolites, presented in our previous publications, is extended by taking into account the effects of energetic heterogeneity of the sites of the same type. The appropriate theoretical equations are derived and used for simultaneous description of the experimental adsorption isotherms and heats of adsorption of benzene and p-xylene in silicalite at 303 K. It is shown that taking into account this additional level of heterogeneity leads to a much better description of both the adsorption isotherms and the related heats of adsorption in these systems. The extended model also allows one to predict correctly the adsorption isotherms of benzene and p-xylene in silicalite at different temperatures using the parameters found at one temperature.

Original languageEnglish
Pages (from-to)6091-6102
Number of pages12
JournalLangmuir
Volume15
Issue number18
DOIs
StatePublished - 1 Jan 1999

Fingerprint

Dive into the research topics of 'Heterogeneous three-site lattice model for adsorption of aromatics in ZSM-5 zeolites: temperature dependence of adsorption isotherms'. Together they form a unique fingerprint.

Cite this