EVALUATION OF THE HEAT OF ADSORPTION OF SOME n-ALKANES ON ALUMINA AND ZEOLITE BY INVERSE GAS CHROMATOGRAPHY

Abstract

The isosteric heat of adsorption of some n-alkanes (n-C₅ to n-C₈) on some adsorbents(activated alumina, natural zeolite(clinoptilolite) and 13X molecular sieve) were evaluated by inverse gas chromatography using the temperature dependence of adsorption.

The isosteric heat of adsorption of the probes on alumina and clinoptilolite were determined in the finite concentration region, and those on 13X were determined in the infinite dilution region.

It was found that the adsorption isotherms for alumina and clinoptilolite conform with the Langmuir equation, and the isosteric heats of adsorption increase linearly with increasing carbon number of the probes for alumina and 13X.

Keywords:

• Inverse gas chromatography
• Heat of adsorption
• n-Alkane adsorption
• Alumina
• Zeolite

ACKNOWLEDGMENTS

This study was financially supported as a project (967/36) by research fund of Osmangazi University.