X-type zeolite membranes: preparation, characterization, and pervaporation performance

被引：50
作者：
Li, S [1 ]
Tuan, VA [1 ]
Falconer, JL [1 ]
Noble, RD [1 ]
机构：
[1] Univ Colorado, Dept Chem Engn, Ctr Engn, Boulder, CO 80309 USA
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2002年 / 53卷 / 1-3期
关键词：
zeolite membrane; 1,3-propanediol; glycerol; zeolite X; seeding; pervaporation;
D O I：
10.1016/S1387-1811(02)00324-4
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
X-type zeolite membranes were prepared by a template-free method on porous tubular supports. The best membrane was prepared as one zeolite layer on a gamma-Al2O3 Support and it had a tri-isopropyl benzene pervaporation flux of 2.3 g/m(2) h at 300 K. This membrane separated 1,3-propanediol from glycerol in aqueous mixtures by pervaporation; at 308 K, the total flux was 2.7 kg/m(2) h, and the 1,3-propanediol/glycerol selectivity was 41. All the component fluxes and the 1,3-propanediol/glycerol selectivity increased with temperature, but the water flux increased faster than fluxes of the other species. The high 1,3-propanediol/glycerol selectivity was due to preferential adsorption of 1,3-propanediol. (C) 2002 Published by Elsevier Science Inc.
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收藏
页码：59 / 70
页数：12
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