Hydrophobic composite membranes for separating of water-alcohol mixture by pervaporation at high temperature

doi:10.1016/j.ces.2014.02.010

Chia Nan University of Pharmacy & Science Institutional Repository > 環境永續暨休閒學院 > 環境工程與科學系(所) > 期刊論文 > Item 310902800/28594

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標題:	Hydrophobic composite membranes for separating of water-alcohol mixture by pervaporation at high temperature
作者:	Fu, Ywu-Jang Lai, Cheng-Lee Chen, Jung-Tsai Liu, Chung-Te Huang, Shu-Hsien Hung, Wei-Song Hu, Chien-Chieh Lee, Kueir-Rarn
貢獻者:	環境工程與科學系
關鍵字:	Hydrophobic composite membrane Pervaporation Positron annihilation lifetime measurement Swelling
日期:	2014-05
上傳時間:	2015-05-06 21:21:54 (UTC+8)
出版者:	Pergamon-Elsevier Science Ltd
摘要:	Hydrophobic composite membranes for dehydrating aqueous alcohol mixtures by pervaporation were investigated. It was suited for applications at high temperatures and for feed mixtures of water and alcohols with high number of carbon atoms. With increasing operating temperatures, pervaporation data indicated simultaneous increase in permeation flux and concentration of water in permeate. At 70 degrees C and for a feed mixture of 10 wt% water and 90 wt% ethanol, the composite poly(2,6-dimethyl-1,4-phenylene oxide) membrane delivered a high flux of 1333 g/(m2h) and a high permeate content of 96.4 wt%, H2O. For a feed with higher water content, the membrane performance was further enhanced. The microstructure of the selective layer was probed with positron annihilation lifetime spectroscopy at varying temperatures. A bimodal free volume distribution was obtained, which described different shifts of free volume as temperature increased: a shift of smaller free volume to a region of much smaller free volume and a shift of bigger free volume to a region of much bigger free volume. (c) 2014 Elsevier Ltd. All rights reserved.
關聯:	Chemical Engineering Science, v.111, pp.203-210
显示于类别:	[環境工程與科學系(所)] 期刊論文

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