Gas permeation properties of ion-exchanged faujasite-type zeolite membranes

被引：142

作者：

Kusakabe, K ^{[1
]}

Kuroda, T ^{[1
]}

Uchino, K ^{[1
]}

Hasegawa, Y ^{[1
]}

Morooka, S ^{[1
]}

机构：

[1] Kyushu Univ, Dept Mat Phys & Chem, Fukuoka 8128581, Japan

来源：

AICHE JOURNAL | 1999年 / 45卷 / 06期

关键词：

D O I：

10.1002/aic.690450608

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

NaY-type zeolite membranes were synthesized on a porous support tube by a hydrothermal process. The membranes were ion-exchanged with Li+ and K+ ions, and permeances through the membranes were determined for an equimolar mixture of CO2 and N-2, as well as for single-components thereof, at a temperature range of 0 - 400 degrees C. The permeance to CO2 showed a maximum at 100 degrees C, but CO2/N-2 selectivity decreased with increasing temperature. The zeolite membranes that were exchanged with K+ and Li+ ions gave higher and lower CO2/N-2 selectivities, respectively, than there found for the NaY-type membrane. The permeation properties of the ion-exchanged zeolite membranes were analyzed using a sorption - diffusion model. The high CO2/N-2 selectivity of the K-exchanged membranes can be explained by the decrease in N-2 sorptivity for the mixed feed.

引用

页码：1220 / 1226

页数：7

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