B.Q. Jiang
,
L. Gu
,
W.L. Zhang
,
Y.S. Sun and F. Lin Chemical Engineering Department of Nanchang University
,
Nanchang 330029
,
China
金属学报(英文版)
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.
关键词:
silica
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