Sorption Studies of Microporous Sol-Gel Modified Ceramic Membranes

被引：19

作者：

de Lange, R. S. A. ^{[1
]}

Hekkink, J. H. A. ^{[1
]}

Keizer, K. ^{[1
]}

Burggraaf, A. J. ^{[1
]}

Ma, Y. H. ^{[2
]}

机构：

[1] Univ Twente, Fac Chem Technol, Lab Inorgan Chem Mat Sci & Catalysis, NL-7500 AE Enschede, Netherlands

[2] Worcester Polytech Inst, Dept Chem Engn, Ctr Inorgan Membrane Studies, Worcester, MA 01609 USA

来源：

JOURNAL OF POROUS MATERIALS | 1995年 / 2卷 / 02期

关键词：

sorption; microporous; ceramic membranes; gas separation; gas transport;

D O I：

10.1007/BF00489722

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Sorption experiments with H-2, CO2, CH4 and iso-C4H10 were performed on microporous SiO2 and SiO2/TiO2 (30 mol% TiO2) non-supported membrane top-layers using volumetric and gravimetric techniques. For silica, the sorption capacity decreases in the order CO2 > iso-C4H10 > CH4 > H2 at temperatures < 373 K. The isosteric heat of adsorption q(st) is 23, 24, 10 and 6 kJ.mol(-1) for respectively CO2, iso-C4H10, CH4 and H-2. The sub-atmospheric adsorption isotherms are of Henry-type for temperatures equal and higher than 348 K for CO2, temperatures higher than 373 K for iso-C4H10, temperatures equal and higher than 194 K for H-2 and for temperatures equal and higher than 273 K for CH4. The sorption capacity for the SiO2/TiO2 sample was only slightly lower than for silica, as may be expected due to the lower porosity.

引用

页码：141 / 149

页数：9

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