Structure and Performance of Porous 7-alumina Transition Layers

Porous γ-alumina transition membranes with a most probable pore size of 0.38μm and thickness of 4μm were successfully synthesized via sol-gel route on the porous alumina substrates with pore size of 0.9μm. The physical chemistry transformation and microstructure of the as-prepared membranes were systematically characterized by using DTA-TG, FTIR, XRD and SEM. The results indicate that the transition membranes fabricated in the work are smooth without any crack. Also, As-prepared membrane has the characteristic of preferred oritation. The separation coefficient for H2-N2 is about 3.30.