Pervaporation performance and Transport phenomenon of PVA blend membranes for the separation of THF/water azeotropic mixtures

被引：0

作者：

P. Srinivasa Rao

S. Sridhar

Ming Yen Wey

A. Krishnaiah

机构：

[1] National Chung Hsing University,Environmental Restoration Disaster Reduction Research Center

[2] Membrane Separations Laboratory,Indian Institute of Chemical Technology

[3] National Chung Hsing University,Department of Environmental Engineering

[4] Department of Chemistry,Sri Venkateswara University

来源：

Polymer Bulletin | 2007年 / 59卷

关键词：

Permeability Coefficient; Pervaporation; Azeotropic Mixture; High Separation Factor; Pervaporation Performance;

D O I：

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学科分类号：

摘要：

Dense polymer membranes were made by mixing aqueous solutions of hydrophilic polymers poly(vinyl alcohol) (PVA) and polyethyleneimine (PEI) in different ratios for investigating the separation of Tetrahydrofuran (THF)/water azeotropic mixtures by pervaporation (PV). In order to gain a more detailed picture of the molecular transport phenomenon, we have performed sorption gravimetric experiments at 30 °C to compute diffusion, swelling, sorption and permeability coefficients of PVA/PEI membranes in the presence of THF and water. The membranes were found to have good potential for breaking the azeotrope of THF at 6% concentration of water. An increase in PVA content in the blend caused a reduction in the flux and an increase in selectivity. Among the blends tested in the study, the 5:1 PVA/PEI blend membrane showed the highest separation factor of 181.5, exhibited a flux of 1.28 kg/m2h for THF respectively at azeotropic feed composition.

引用

页码：289 / 298

页数：9