AGING AND STABILITY OF MICROPOROUS SOL-GEL-MODIFIED CERAMIC MEMBRANES

被引：26

作者：

DELANGE, RSA ^{[1
]}

KEIZER, K ^{[1
]}

BURGGRAAF, AJ ^{[1
]}

机构：

[1] UNIV TWENTE,FAC CHEM TECHNOL,INORGAN CHEM MAT SCI & CATALYSIS LAB,7500 AE ENSCHEDE,NETHERLANDS

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1995年 / 34卷 / 11期

关键词：

D O I：

10.1021/ie00038a022

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Aging experiments on microporous sol-gel-derived nonsupported SiO2 membranes were performed. Microstructure characterization was performed using nitrogen physisorption. It is found that both chemical aging and thermal aging result in densification of the microstructure, without pore growth. The influence of aging on supported SiO2-modified membranes was investigated using gas permeation and separation experiments. As for the nonsupported materials, some densification takes place. This leads to lower permeation rates, but a strong positive effect was observed on the separation properties. This might be attributed to a decrease of the pore size. Separation factors ranging from 50 to 125 have been measured for H-2/CH4 at temperatures in the order of 250 degrees C.

引用

页码：3838 / 3847

页数：10

共 35 条

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