Premium
Highly Efficient Composite Membranes for Ethanol‐Water Pervaporation
Author(s) -
Krasemann L.,
Tieke B.
Publication year - 2000
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/(sici)1521-4125(200003)23:3<211::aid-ceat211>3.0.co;2-7
Subject(s) - pervaporation , membrane , chemical engineering , permeation , ethanol , composite number , chromatography , polyelectrolyte , polyethylene , chemistry , materials science , organic chemistry , composite material , polymer , biochemistry , engineering
The utility of composite membranes for ethanol‐water pervaporation was investigated. It was found that the separation capability is highest if polyelectrolytes with high charge density, such as polyethylene‐imine (PEI) and polyvinylsulfate (PVS), are used. Under optimum conditions, the PEI/PVS separation layer is highly efficient in water enrichment in the permeate. A separation factor up to 1000 could be detected, the flux being 590 g/m 2 h. Effects of membrane annealing and change in pervaporation temperature are also discussed.