Two-Stage Membrane Separation with Carrier Gas for Ethanol–Water Mixtures Using Silicone Rubber and Polyimide Hollow Fibers

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Akira Ito²  Michihiro Fujii²  Takashi Harada¹ 

[1] Corporate Research & Development, Ube Industries, Ltd.;Department of Chemical Engineering, Niigata University

关键词: Membrane Separation;    Silicone Rubber Membrane;    Polyimide Membrane;    Ethanol–Water Mixture;    Pervaporalion;    Gas Membrane Separation;   

DOI  :  10.1252/jcej.23.175

来源: Maruzen Company Ltd

【 摘 要 】

References(12)Cited-By(1)A two-stage membrane separation process composed of one step using a silicone rubber membrane hollow-fiber module and another step using a polyimide hollow-fiber module for effective separation of alcohol from a low-concentration alcohol–water solution was proposed and its effectiveness was experimentally confirmed.The first step is a pervaporation through the silicone rubber into a carrier gas, and the second is a gas-phase separation through the polyimide membrane. By use of these two steps in series, 99% and 1% solutions were separated from 5–10 mol% ethanol solution.This effective separation must be due to the high permeation rate of water vapor through the polyimide membrane, 200-fold that of ethanol vapor as shown by the experimental data.

【 授权许可】

Unknown