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JSIR Vol.67(03) [March 2008] >


Title: Dehydration of alcohols by pervaporation using hydrophilic polyether urethane membranes
Authors: Das, Swatilekha
Sarkar, Suparna
Basak, Piyali
Adhikari, Basudam
Keywords: Flux
Pervaporation
Polyether urethane
Separation factor
Issue Date: Mar-2008
Publisher: CSIR
Abstract: This study presents pervaporation separation of methanol-water (MW), ethanol-water (EW) and isopropanol-water (IW) mixtures through a series of polyethylene glycol (PEG) based polyether urethane membranes. Five polyether urethane (PUPEG) membranes were developed by using PEGs of increasing molecular weight (PEG₂₀₀, PEG₄₀₀, PEG₆₀₀, PEG₁₀₀₀ and PEG₄₀₀₀). PUPEG membranes showed selectivity towards water, which increased with increasing molecular weight as well as increasing polymer chain length of the membrane. PUPEG membrane prepared using PEG₄₀₀₀ showed highest separation performance in dehydrating water from three alcohol-water mixtures. A pervaporation flux of 0.48 kg/m².h was achieved with 94.5% water in permeates from 20% water present in isopropanol-water mixture using PUPEG₄₀₀₀ membrane. All PUPEG membranes showed water separation performances; flux and separation factor for water varied in the order: MW
Page(s): 219-227
ISSN: 0022-4456
Source:JSIR Vol.67(03) [March 2008]

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