文献类型：期刊文献

英文题名：Pervaporation of ethanol/water mixture by organophilic nano-silica filled PDMS composite membranes

作者：Sun, De[1,2];Li, Bing-Bing[2];Xu, Zhen-Liang[1]

机构：[1]E China Univ Sci & Technol, Chem Engn Res Ctr, State Key Lab Chem Engn, Membrane Sci & Engn R&D Lab, Shanghai 200237, Peoples R China;[2]Changchun Univ Technol, Dept Chem Engn, Changchun 130012, Peoples R China

年份：2013

卷号：322

起止页码：159

外文期刊名：DESALINATION

收录：;EI(收录号：20132616450571);WOS:【SCI-EXPANDED(收录号:WOS:000322431800019)】；

基金：The authors acknowledge the Key Technology R&D Program of China (2006BAE02A01) and Chemistry & Chemical Technology Research Center Plan of Shanghai Huayi Group Company (A200-8608 and A200-80726) for giving financial supports in this project

语种：英文

外文关键词：Organophilic nano-silica; PDMS composite membranes; Pervaporation; Ethanol-water

摘要：A novel organophilic nano-silica (ONS) filled polydimethylsiloxane (PDMS) composite membrane was prepared and characterized for the pervaporation (PV) of ethanol from water. The sorption and diffusion behaviors of ethanol and water in the composite membranes were investigated. The results showed that with increasing ONS concentration from 0 wt.% to 10 wt.%, the solubility selectivity and the diffusion selectivity increased from 21.87 to 38.85 and from 1.87 to 6.18, respectively. When the temperature ranged from 30 degrees C to 70 degrees C, the solubility selectivity increased but the diffusion selectivity first increased and then decreased. The effects of ONS content, feed temperature and permeate-side vacuum on the PV performance of the composite membrane for the pervaporation of 5 wt.% ethanol-water mixture were studied. The examinations showed that the composite membranes exhibited striking advantages in total flux and separation factor as compared with unfilled PDMS membrane. When ONS loading was 5 wt.%, the PDMS composite membrane showed the best PV performances with the permeate flux (J) of 114 g/(m(2) . h), the separation factor (alpha) of 30.1 and permeate separate index (PSI), of 3420, respectively. With an increase of the feed temperature from 30 to 70 degrees C, the total flux of filled PDMS membrane with 5 wt.% ONS increased apparently from 11.1 to 210 g/(m(2) . h), and the maximum separation factor of 30.1 was observed at 60 degrees C. With an increase of vacuum in permeate-side from 0.075 to 0.100 MPa, both separation factor and total flux increased for filled PDMS membrane with 5 wt.% ONS. (C) 2013 Elsevier B.V. All rights reserved.