The silicalite-1 zeolite membrane was prepared by secondary synthesis on the porous α-Al2O3 support. The samples were characterized by XRD and SEM, and the permeant selectivity of the membrane was characterized by single-gas at room temperature. The results showed that the membrane re-grew, its thickness was about 8 to 10μm and the ideal separation factors were 3.9 for H2/N2 and 19.1 for H2/C3H8 at room temperature, respectively, which were larger than the Knudsen diffusion ratios 3.74 for H2/N2 and 4.69 for H2/C3H8, the permeation rate of H2 was 1.43 x l0-6mol/m2sPa. The data of gas permeation indicated that the membrane was defect-free.

Synthesis of Silicalite-1 Zeolite Membrane by Nanocrystal Seed Coating Method. C.L.Kong, J.Q.Wang, J.M.Lu, K.Tao: The Chinese Journal of Process Engineering, 2007, 7[1], 71-4