期刊
JOURNAL OF MEMBRANE SCIENCE
卷 399, 期 -, 页码 106-111出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2012.01.036
关键词
Inorganic membrane; Zeolite membrane; Separation; Pervaporation; Biofuel
资金
- Bio4Energy
- Swedish Foundation for Strategic Research
- Knut and Alice Wallenberg Foundation
Discrete Faujasite zeolite nanocrystals with an average size of about 60 nm were attached as a well-defined monolayer on the surface of porous graded alumina supports. Ultrathin zeolite X films with a total thickness of about 1 mu m were grown from the seed monolayers by hydrothermal treatment in clear synthesis solutions. One of the membranes showed a total flux of 3.37 +/- 0.08 kg m(-2) h(-1) and a separation factor of 296 +/- 4 for dehydration of a 90/10 wt.% ethanol/water mixture by pervaporation at 65 degrees C. Moreover, the membranes displayed stable performance during pervaporation for 5.5 h operation. A mathematical model indicated that the flux and selectivity of the membranes were limited by pressure drop in the supports. Therefore, in order to obtain higher flux, the permeability of the support must be improved. (c) 2012 Elsevier B.V. All rights reserved.
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