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Mesoporous MCM-48 membranes were prepared on asymmetric zirconia tubular support with an average pore size of 0.2 μm by hydrothermal method.The support should be pretreated with H2O as a pore-filling substance to prevent the sol solution from infiltrating into the support pores.The SEM showed that the MCM-48 membrane was composed of tightly-connected spherical crystal.The single gas N2 and H2 permeation experiments confirm that crack-free membrane could be prepared by pore-filling method.N2 permeance of MCM-48 membrane,synthesized by secondary growth,can reach 5.66×10-7 mol/Pa·s·m2,and the H2/N2 separation factor was 3.47 under trans-membrane pressure of 0.05 MPa.
Mesoporous MCM-48 membranes were prepared on asymmetric zirconia tubular support with an average pore size of 0.2 μm by hydrothermal method. The support should be pretreated with H2O as a pore-filling substance to prevent the sol solution from infiltrating into the support pores. SEM showed that the MCM-48 membrane was composed of tightly-connected spherical crystal. The single gas N2 and H2 permeation experiments confirm that the crack-free membrane could be prepared by pore-filling method. N2 permeance of MCM-48 membrane, synthesized by secondary growth, can reach 5.66 × 10-7 mol / Pa · s · m2, and the H2 / N2 separation factor was 3.47 under trans-membrane pressure of 0.05 MPa.