Preparation of novel chabazite (CHA)-type zeolite layer on porous α-Al2O3 tube using template-free solution

被引：72

作者：

Hasegawa, Y. ^{[1
]}

Hotta, H. ^{[1
]}

Sato, K. ^{[1
]}

Nagase, T. ^{[1
]}

Mizukami, F. ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Res Ctr Compact Chem Proc, Miyagino Ku, Sendai, Miyagi 98308551, Japan

来源：

JOURNAL OF MEMBRANE SCIENCE | 2010年 / 347卷 / 1-2期

关键词：

Zeolite; Thin film; Separation; Dehydration; Ethanol; PERVAPORATION PERFORMANCE; PERMEATION PROPERTIES; MEMBRANES;

D O I：

10.1016/j.memsci.2009.10.024

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Dehydration is an important process in chemical industries. Zeolite membranes show excellent dehydration performance as compared to other polymeric membranes. A polycrystalline chabazite (CHA) type zeolite layer with a Si/Al ratio of 3.2 was successfully formed on a porous substrate by the secondary growth of seed particles in a solution containing strontium. Furthermore, the dehydration performance of the membrane was determined by pervaporation for ethanol solutions. For a 90 wt% ethanol solution at 348 K, the overall permeation flux and separation factor of the membrane were found to be 4.14 kg m(-2) h(-1) and 39.500, respectively. The CHA-type zeolite membrane could remove water selectively in the solution around pH 2 for 10 h. These results suggest that the CHA-type zeolite membrane can selectively remove water from many kinds of organic solvents. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：193 / 196

页数：4

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