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

被引：33

作者：

Fu, Ywu-Jang ^{[1
]}

Lai, Cheng-Lee ^{[2
]}

Chen, Jung-Tsai ^{[3
]}

Liu, Chung-Te ^{[3
]}

Huang, Shu-Hsien ^{[4
]}

Hung, Wei-Song ^{[3
]}

Hu, Chien-Chieh ^{[3
]}

Lee, Kueir-Rarn ^{[3
]}

机构：

[1] Vanung Univ, Dept Biotechnol, Chungli 32023, Taiwan

[2] Chia Nan Univ Pharm & Sci, Dept Environm Engn & Sci, Tainan 717, Taiwan

[3] Chung Yuan Christian Univ, Dept Chem Engn, R&D Ctr Membrane Technol, Chungli 32023, Taiwan

[4] Natl Ilan Univ, Ilan 26047, Taiwan

来源：

CHEMICAL ENGINEERING SCIENCE | 2014年 / 111卷

关键词：

Hydrophobic composite membrane; Pervaporation; Positron annihilation lifetime measurement; Swelling; POLY(PHENYLENE OXIDE); AQUEOUS MIXTURES; BLEND MEMBRANES; ACETIC-ACID; ETHANOL; DEHYDRATION; CHITOSAN; STABILITY; POLYAMIDE; RECOVERY;

D O I：

10.1016/j.ces.2014.02.010

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

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.

引用

页码：203 / 210

页数：8

共 49 条

[1] Characterization of EVA/clay nanocomposite membranes and its pervaporation performance [J].