R. Jiraratananon et al., Pervaporation dehydration of ethanol-water mixtures with chitosan/hydroxyethylcellulose (CS/HEC) composite membranes I. Effect of operating conditions, J MEMBR SCI, 195(2), 2002, pp. 143-151
Composite hydrophilic pervaporation membranes were prepared from chitosan b
lended with hydroxyethylcellulose using cellulose acetate as a porous suppo
rt. The membranes were tested for dehydration performance of ethanol-water
mixtures of ethanol concentrations 70-95 wt.% in the laminar flow region, a
t temperatures 50-70 degreesC and at permeate pressures of 3-30 mmHg. The c
omposite membrane showed an improved dehydration performance compared with
dense CS/HEC membrane developed earlier. The effects of operating condition
s also revealed that pervaporation of low water content feed carried out at
high feed flow rate and at low temperature and permeate pressure was an ad
vantage. (C) 2002 Elsevier Science B.V. All rights reserved.