Adsorbed-phase non-ideality for adsorption of binary liquid mixtures on heterogeneous adsorbents

Abstract

Adsorption from binary liquid mixtures can be explained in terms of ideal adsorption on a heterogeneous adsorbent or non-ideal absorption on a homogeneous adsorbent. A direct correlation exists between the degree of the adsorbent heterogeneity and the adsorbed-phase activity coefficients. The more heterogeneous the adsorbent, the larger are the absorbed phase non-idealities. Direct measurement of adsorbent heterogeneity may be needed to confirm its existence.