Synthesis of ZSM-5 Zeolite Membrane by DifferentSeeded Growth Method and Its Influence on Separation of Xylene Isomer

Seeded growth on alumina support is one of the most important steps in synthesis ofzeolite membrane process that typically perform with frictional contact, immersion andelectrophoresis method. In this study, to evaluate and compare these methods, zeolite seeds growed on alpha-alumina support by two Frictional contact and immersion in suspension and then heated using the hydrothermal method at 180 °C to prepare zeolite membranes.Finally influence of these methods on the performance of membrane was evaluated by evaporation of xylene isomers. P-xylene due to the smaller molecular size than the two other isomer in the membrane pore size can be too easily absorbed in the zeolite pores and penetrated the surface and this may be a good measure to evaluate synthesis of zeolite membrane. Results showed that the membrane of the immersion method used for seed growth with separation factor 2.66 had best performance than other two membranes.