Vapor-Permeation Separation of Water-Ethanol Mixtures by Asymmetric Polyimide Hollow-Fiber Membrane Modules

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Yoshihiro Kusuki¹  Nozomu Tanihara²  Hidetoshi Kita²  Kazuhiro Tanaka²  Asumaru Nakamura³  Kanji Nakagawa¹  Ken-ichi Okamoto² 

[1] Chiba Laboratory, Corporate Research and Development, Ube Industries Ltd.;Department of Advanced Materials Science and Engineering, Faculty of Engineering, Yamaguchi University;Corporate Research and Development, Ube Industries Ltd.

关键词: Membrane Separation;    Vapor Permeation;    Ethanol-Water System;    Polyimide;    Membrane;   

DOI  :  10.1252/jcej.25.388

来源: Maruzen Company Ltd

【 摘 要 】

References(15)Cited-By(12)Vapor-permeation separation of water-ethanol mixtures by asymmetric polyimide hollow-fiber membrane modules was carried out in a countercurrent flow pattern and in a both-end-opened pattern to investigate membrane performance and the effects of operating factors on the membrane module responses. The specific permeability coefficient of water vapor for the fibers was about 4 × 10–7 mol/(m2·s·Pa) at 378K, which was about 500 times that of ethanol vapor. The experimental results of membrane module responses for enrichment of ethanol composition at feed outlet, XRE, up to 99.7wt% were in good agreement with the results calculated from a conventional model. The both-end-opened flow pattern was much superior to the countercurrent one, especially for high-level enrichment, because of reduced buildup of permeate pressure inside the hollow fibers. The calculation showed optimum inside diameter and length of the hollow-fibers, depending on XRE and feed-side pressure.

【 授权许可】

Unknown