Silicalite‐Filled PEBA Membranes for Recovering Ethanol from Aqueous Solution by Pervaporation |
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| Authors: | Jin Gu Xuan Shi Yunxiang Bai Hongmang Zhang Lin Zhang He Huang |
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| Affiliation: | 1. School of Chemical and Material Engineering, Jiangnan University, Wuxi, P.R. China;2. College of Materials Science and Chemical Engineering, Zhejiang University, Hangzhou, P.R. China;3. Department of Life Science and Pharmaceutical Engineering, Nangjing University of Technology , Nanjing, P.R. China |
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| Abstract: | Pervaporation (PV) performances of silicalite‐filled polyether‐block‐amide (PEBA) membranes for separation of ethanol/water mixtures have been studied. The effects of silicalite content, ethanol concentration in feed, and feed temperature on the PV performances of the membranes have been investigated. It is found that addition of silicalite can improve PV performances of PEBA membranes. When the silicalite content is 2.0 wt %, both permeation flux and separation factor reach the maximum values, which are 833 g/m2h and 3.6, respectively. With increasing of ethanol in the feed and feed temperature, both separation factor and total flux increased. The higher permeation activation energy of ethanol (Eethanol = 21.62 kJ/mol) compared to that of water (Ewater = 18.33 kJ/mol) for the 2.0 wt% silicalite‐filled PEBA membrane accounts for the increase of the separation factor with feed temperature. |
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| Keywords: | Ethanol/water mixtures Membranes PEBA Pervaporation Silicalite |
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