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Silicalite‐Filled PEBA Membranes for Recovering Ethanol from Aqueous Solution by Pervaporation
Author(s) -
Gu Jin,
Shi Xuan,
Bai Yunxiang,
Zhang Hongmang,
Zhang Lin,
Huang He
Publication year - 2009
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200800252
Subject(s) - pervaporation , membrane , permeation , ethanol , chemistry , chemical engineering , aqueous solution , chromatography , organic chemistry , biochemistry , engineering
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/m 2 h 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 ( E ethanol = 21.62 kJ/mol) compared to that of water ( E water = 18.33 kJ/mol) for the 2.0 wt% silicalite‐filled PEBA membrane accounts for the increase of the separation factor with feed temperature.