Research and development of pervaporation and vapor permeation for organic liquid mixtures through zeolite membranes

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Zeolite membranes were prepared on the surface of porous tubular support using the hydrothermal synthesis. The surface morphologies of the membranes were characterized by X- ray diffraction and SEM.Based on pervaporation and vapor permeation measurements for organic liquid mixtures, NaA.zeolite membrane showed very high water-selective permeation for water/organic liquid mixture, NaY zeolite membrane showed very high alcohol-selective for alcohol/ether or alcohol/benzene mixtures, and ZSM-5 zeolite membrane showed alcohol-selective for alcohol/water mixtures. The tubular-type modules have been fabricated with NaA zeolite membrane, which has high pervaporation performance, excellent mechanical strength, thermal resistance and extremely high durability to solvents.