HOLLOW FIBER INORGANIC MEMBRANES FOR GAS SEPARATIONS

被引：80

作者：

WAY, JD ^{[1
]}

ROBERTS, DL ^{[1
]}

机构：

[1] SRI INT,CTR CHEM ENGN DEV,MENLO PK,CA 94025

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 1992年 / 27卷 / 01期

关键词：

D O I：

10.1080/01496399208018863

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pure gas permeabilities of He, H-2, CO2, N2, and CO were measured for microporous silica hollow fiber membranes as a function of temperature. The transport mechanism for gas permeation is clearly non-Knudsen since several heavier gases permeate faster than lighter gases. An excellent correlation is obtained between permeability and kinetic diameter of the penetrant. The proposed mass transfer mechanism is a combination of surface diffusion and molecular sieving. High ideal separation factors (permeability ratios) are observed at 343 K for H-2/N2 and H-2/CO of 163 and 62.4, respectively, which compare very favorably with polymeric and molecular sieve gas separation membranes.

引用

页码：29 / 41

页数：13

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