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题名: Pervaporation and vapor permeation dehydration of Fischer-Tropsch mixed-alcohols by LTA zeolite membranes
作者: Li, Yanshuo;  Chen, Hongliang;  Liu, Jie;  Li, Hongbo;  Yang, Weishen
关键词: LTA zeolite membranes ;  pervaporation ;  vapor permeation ;  fischer-tropsch ;  mixed-alcohols
刊名: SEPARATION AND PURIFICATION TECHNOLOGY
发表日期: 2007-10-01
DOI: 10.1016/j.seppur.2007.03.027
卷: 57, 期:1, 页:140-146
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Engineering, Chemical
研究领域[WOS]: Engineering
英文摘要: Aiming at the applications in Fischer-Tropsch synthesis of mixed-alcohols, microwave synthesized LTA zeolite membranes were applied to pervaporation and vapor permeation dehydration of unitary and mixed alcohols. The water to methanol separation factor was found to lie between 150 and 1000. Both water to ethanol and water to propanol separation factors were observed to be above 10,000 over a wide range of solvent concentration. It was found that the water flux was only depended on its own driving force, i.e. the pressure difference of water across the membrane. High separation factors were also obtained by vapor permeation for ethanol and isopropanol systems. At the liquid-vapor equilibrium state, the water fluxes of pervaporation and vapor permeation showed no obvious difference. Two different types of F-T mixed-alcohols were dehydrated by pervaporation and vapor permeation, respectively. One is simulated mixed-alcohols based on IFP technique, and the other is actual F-T liquid produced on Rh-based catalysts. The separation factor of the former was similar to that of methanol system, and the water flux was between that of methanol and ethanol. This is coincided with the fact that the mixed-alcohols are mainly composed of methanol and ethanol. As for the latter, good separation performance was obtained at the initial stage. However, the long chain hydrocarbon impurities in the feed fouled the membrane during the operation, which resulted in an obvious decrement of the permeate flux after 3 h of operation. (c) 2007 Elsevier B.V. All rights reserved.
关键词[WOS]: MOLECULAR-SIEVE MEMBRANES ;  SEPARATION ;  MIXTURES ;  GASES ;  WATER
语种: 英语
WOS记录号: WOS:000249835300017
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140586
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Li, Yanshuo,Chen, Hongliang,Liu, Jie,et al. Pervaporation and vapor permeation dehydration of Fischer-Tropsch mixed-alcohols by LTA zeolite membranes[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2007,57(1):140-146.
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