Collect. Czech. Chem. Commun.
1992, 57, 1201-1209
https://doi.org/10.1135/cccc19921201
BET Adsorption Isotherm and Surface Heterogeneity
Lydia Ethel Cascarini de Torre and Eduardo Jorge Bottani
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, Castilla de Correo 16 Sucursal 4, RA-1900, La Plata, Argentina
Abstract
The BET adsorption isotherm is modified in order to take account of surface heterogeneity. The adsorption isotherm is obtained following the statistical mechanics formalism, proposed by Steele, and the effect of surface heterogeneity is limited to the first layer. A Gaussian adsorption energies distribution function is used to describe surface heterogeneity. The variations of the C parameter, multilayer formation and the inversion of adsorption isotherms are analysed.
