ADSORBED PHASE-COMPOSITION IN LIQUID-PHASE ADSORPTION OF ORGANIC-COMPOUNDS FROM AQUEOUS-SOLUTIONS ON HYDROPHOBIC ZEOLITES

The adsorption of binary alcohol-water mixtures on hydrophobic NaZSM-5 zeolites has been studied. It was shown that calculation of the adsor bed-phase composition using the saturation method or the volume-fillin g model is inadequate. Because the adsorption of water on NaZSM-5 zeol ites is restricted, the adsorption of the mixture can be described by a new theoretical model. The adsorption volume was separated into two components: in the first, only the adsorption of the organic component is considered. The adsorption mechanism in the second volume correspo nds to the classical 'exchange reaction' between water and the organic component.