Gas permeation properties of ion-exchanged ZSM-5 zeolite membranes

被引：53
|
作者：
Aoki, K
Tuan, VA
Falconer, JL
Noble, RD [1 ]
机构：
[1] Univ Colorado, Dept Chem Engn, Boulder, CO 80309 USA
[2] Kyushu Univ, Dept Mat Phys & Chem, Grad Sch Engn, Fukuoka 8128581, Japan
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2000年 / 39卷 / 03期
关键词：
zeolite membranes; ion exchange; gas permeation; ZSM-5;
D O I：
10.1016/S1387-1811(00)00224-9
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Hydrothermally synthesized, ZSM-5 zeolite membranes (Si/Al = 25 and 600) were ion exchanged with H+, Na+, K+, Cs+, Ca2+ and Ba2+ cations, and the membranes were stable after exchange. Their gas permeation properties were measured over the temperature range of 323-523 K. Both the Si/Al ratio and the exchanged ion size affected the separation performance. For the membrane with a Si/AI ratio of 600, ion exchange only changed the single gas permeances of i-C4H10, apparently because the number of exchange sites was small. For the membrane with Si/Al = 25, single gas permeances increased for the exchanged forms in the order: K+ < Ba2+ similar to Ca2+ < Cs+ < Na+ similar to H+, which coincides with the decrease in ion size and only the Cs ion does not fit this trend. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：485 / 492
页数：8
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