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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
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.
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页码:164 / 172
页数:9
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