M. Rozwadowski et al., ENERGY-DISTRIBUTION FUNCTION-ASSOCIATED WITH DUBININ DESCRIPTION OF WATER-ADSORPTION ON ZEOLITE-Y, Langmuir, 9(10), 1993, pp. 2661-2664
Different equations based on the Polanyi-Dubinin potential theory and
applicable to the description of adsorption isotherms on zeolites are
presented. Specifically, these equations are suitable for characterizi
ng the adsorption potential distributions, the parameters of which are
related to the energetic and structural heterogeneities of zeolites.
The results presented show that the equation which takes into account
both the surface and structural heterogeneities as well as the distrib
ution of sizes of micropores participating in the process of adsorptio
n is especially interesting. This equation represents the experimental
adsorption data better than the other equations considered. Different
heterogeneities of the samples of zeolite Y used in this study were a
chieved by modification by ion exchange.