Acta Metallurgica Sinica (English Letters) ›› 1999, Vol. 12 ›› Issue (5): 1077-1081.

• Research paper • Previous Articles     Next Articles

PREPARATION OF SILICA MOLECULAR SIEVE MEMBRANE FOR HYDROGEN SEPARATION

B.Q. Jiang, L. Gu,W.L. Zhang,Y.S. Sun and F. Lin Chemical Engineering Department of Nanchang University, Nanchang 330029, China   

  • Received:1999-10-25 Revised:1999-10-25 Online:1999-10-25 Published:2009-10-10

Abstract: A ceramic tube supported γ alumina silica inorganic composite membrane was made by modifying a ceramic tube supported γ alumina film with a silica sol using sol gel method. The thickness of the silica thin film was 750? and the pore diameter was less than 5?.The prepared silica molecular sieve membrane displayed a high hydrogen permeability and high selectivities of H 2/N 2 and H 2/CO 2 gas mixtures. This composite membrane can be used to separate high purity hydrogen of more than 99 5% from various kinds of industrial waste gas mixtures containing hydrogen.

Key words: silica, ceramic membrane, inorganic composite membrane, sol gel