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Received February 8, 2001
Accepted September 14, 2001
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Influence of Temperature Drop by Phase Transition on Pervaporation Processes in Vapor Phase Feed
Nuclear Power Laboratory, Korea Electric Power Research Institute, 103-16 Munji-dong, Yusong-gu, Daejeon 305-380, Korea 1Department of Chemical & Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701, Korea 2Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
whhong@mail.kaist.ac.kr
Korean Journal of Chemical Engineering, March 2002, 19(2), 290-295(6), 10.1007/BF02698416
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Abstract
In this study, pilot pervaporation experiments of ethanol dehydration from the vapor phase feed have been carried out. The dehydration time decreased with increasing of the feed temperature and did not vary with the feed flow rate. The temperature dependence of permeation rate in vapor phase feed was larger than that in liquid phase feed. Contrary to the pilot pervaporation of liquid phase feed, the higher the feed flow rate, the larger the temperature drop is. The variation of temperature drop with permeate flux in vapor phase feed is larger than that in liquid phase owing_x000D_
to the heat loss of the membrane module itself.
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