n-Decane adsorption on SiO2-adsorbents

Abstract
The equilibrium of n-decane adsorption on microporous and mesoporous SiO2-adsorbents (silicalite, SiO2-faujasite US-Ex, aerosil 200) was investigated using isoteric measurements. Following the comparison of the dispersion energy for porous and non-porous adsorbents carried out by Barrer (1966) and theoretical investigations of de Boer & Custers (1934) experimental data were analysed. A simple empirical correlation between the pore diameter of the adsorbents and the initial isosteric adsorption heat was found. The equation parameters are the condensation heat of the adsorbate, the diameter of the adsorbate molecule and an empirical constant.