Gas permeation properties of A-type zeolite membrane formed on porous substrate by hydrothermal synthesis

被引:169
作者
Aoki, K [1 ]
Kusakabe, K [1 ]
Morooka, S [1 ]
机构
[1] Kyushu Univ, Grad Sch Engn, Dept Mat Phys & Chem, Funct Mat Grp, Fukuoka 81281, Japan
关键词
ceramic membranes; gas separations; microporous and porous membranes; zeolite;
D O I
10.1016/S0376-7388(97)00300-1
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
A-type zeolite membranes were synthesized on a porous support tube by a hydrothermal process. The membranes were polycrystalline, and the thickness was in the range of 0.4-3.8 mu m. They were stable against repeated temperature changes over the range 35-300 degrees C. Permeances of the membranes, determined using He, H2O, H-2, CO2, O-2, N-2, CH4 and C3H8, were dependent on the size of permeate, and the maximum H-2/N-2 separation factor was 4.8 for a mixed H-2-N-2 feed. This suggests the permeation was, at least in part, affected by a molecular sieving mechanism, although the membranes contained some pores larger than the structural pores of the zeolite. (C) 1998 Elsevier Science B.V.
引用
收藏
页码:197 / 205
页数:9
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