Microwave-assisted hydrothermal synthesis of a&b-oriented zeolite T membranes and their pervaporation properties

被引：67
|
作者：
Zhou, Han [1 ,2 ]
Li, Yanshuo [1 ]
Zhu, Guangqi [1 ,2 ]
Liu, Jie [1 ]
Yang, Weishen [1 ]
机构：
[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100864, Peoples R China
来源：
SEPARATION AND PURIFICATION TECHNOLOGY | 2009年 / 65卷 / 02期
基金：
美国国家科学基金会;
关键词：
Zeolite membrane; Microwave synthesis; Pervaporation; Membrane stability; Inorganic membrane; SILICALITE-1; MEMBRANES; PERMEATION PROPERTIES; MFI FILMS; SEPARATION; MIXTURES; DEHYDRATION; PERFORMANCE; GROWTH;
D O I：
10.1016/j.seppur.2008.10.046
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
By microwave-assisted hydrothermal synthesis (MAHS) method, a&b-oriented zeolite T membranes were firstly prepared on the alpha-Al2O3 tubes from the a&b-oriented seed layers. By adjusting the pH value of the seed suspension, zeolite T seeds about 8.5 mu m long were uniformly deposited on the support surface with their a&b-axes perpendicular to the support surface. After the secondary growth, the a&b-oriented seed layers grew into a&b-oriented zeolite T membranes with the thickness of about 7 mu m. A formation mechanism of the membranes was proposed, which could provide general guidance for the preparation of other types of zeolite membranes. The as-synthesized membranes displayed high pervaporation (PV) performance for alcohol/water liquid mixtures. Aiming at the application in the industrial dehydration process, the hydrothermal stability and acid stability of the zeolite T membranes were also investigated. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：164 / 172
页数：9
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