SEPARATION OF SUPERCRITICAL CO2 AND ETHANOL MIXTURES WITH AN ASYMMETRIC POLYIMIDE MEMBRANE

被引：37

作者：

SEMENOVA, SI ^{[1
]}

OHYA, H ^{[1
]}

HIGASHIJIMA, T ^{[1
]}

NEGISHI, Y ^{[1
]}

机构：

[1] YOKOHAMA NATL UNIV,DEPT MAT SCI & CHEM ENGN,TOKIWADAI,HODOGAYA KU,YOKOHAMA,KANAGAWA 240,JAPAN

来源：

JOURNAL OF MEMBRANE SCIENCE | 1992年 / 74卷 / 1-2期

关键词：

ASYMMETRIC MEMBRANES; ETHANOL-CO2; SEPARATION; SUPERCRITICAL FLUID; POLYIMIDE;

D O I：

10.1016/0376-7388(92)87078-C

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Asymmetric polyimide Kapton(R) membranes were made by casting a solution of 18 wt.% polyamic acid and 5 wt.% phenanthrene in dimethylacetamide at 70-degrees-C, with a four-minute evaporation time. A value of 8.7 was obtained for the separation factor, alpha(ethanol)/CO2, in experiments conducted at 373 K and 15 MPa for supercritical fluid feed mixtures with a CO2-ethanol molar concentration ratio of 15:1. From the data obtained, a calculation was carried out to determine the required membrane area for 90% recovery of ethanol from mixtures with an initial concentration of 1 mol% and a feed rate of 36 mol/hr. This area is 0.82 m2 for separations conducted at 10 MPa and 373 K and 0.28 m2 at 15 MPa and 373 K.

引用

页码：131 / 139

页数：9

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