Adsorption of chlorobenzene and benzene on gamma-Al2O3

Adsorption of chlorobenzene and benzene on gamma -Al2O3 was investigated in the 413-572 K temperature region at an adsorbate partial pressure ranging from 2 to 1000 Pa. The adsorption isotherms were measured and the isosteric heats and the entropy characteristics of adsorption were determined. The e xperimentally found and theoretically calculated entropy changes upon adsor ption were compared. The mobility of the molecules of both adsorbates in th e adsorption layer was limited with respect to that predicted by the ideal two-dimensional gas model. The mechanism of adsorption of benzene and chlor obenzene is discussed.