VAPOR-PHASE ADSORPTION EQUILIBRIA OF TOLUENE PLUS 1-PROPANOL MIXTURESON Y-ZEOLITES WITH DIFFERENT SILICON TO ALUMINUM RATIOS

Zeolites with various silicon to aluminum ratios usually exhibit polar and nonpolar adsorption behavior depending on the degree of dealumina tion. The objective of the present study was to show the influence of the surface polarity on the adsorbate phase composition containing a p olar and a nonpolar component: toluene and 1-propanol, respectively. S uch systematic investigations should help to understand the significan ce of some adsorbent parameters, such as the surface heterogeneity. Th is basic knowledge is important for the development of improved models for the prediction of multicomponent adsorption equilibria.