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Drastic improvement of bioethanol recovery using a pervaporation separation technique employing a silicone rubber-coated silicalite membrane

✍ Scribed by Toru Ikegami; Dai Kitamoto; Hideyuki Negishi; Kenji Haraya; Hiroyuki Matsuda; You Nitanai; Nobuyuki Koura; Tsuneji Sano; Hiroshi Yanagishita

Publisher
Wiley (John Wiley & Sons)
Year
2003
Tongue
English
Weight
128 KB
Volume
78
Category
Article
ISSN
0268-2575

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✦ Synopsis

Abstract

A coupled fermentation/pervaporation process for reliable production of concentrated ethanol was studied using ethanol permselective silicalite membranes coated with two types of silicone rubber, KE‐45 and KE‐108, as a hydrophobic material. Ethanol recovery was greatly improved by using a membrane coated with KE‐45 silicone rubber. The recovered ethanol concentration in the permeate was 67% (w/w), and the amount of recovered ethanol from the broth was more than 10 times higher than that using a non‐coated membrane. Succinic acid and glycerol, by‐products created during fermentation, interfered with the pervaporation performance of the coated membrane when used to separate an ethanol/water solution. Copyright © 2003 Society of Chemical Industry

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