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Preparation and gas permeability of the surface-modified porous Al2O3 ceramic filter for CO2 gas separation

Authors :
Sachiko Matsushita
Toshihiro Isobe
Akira Nakajima
Mai Shimizu
Source :
Journal of Asian Ceramic Societies. 1:65-70
Publication Year :
2013
Publisher :
Informa UK Limited, 2013.

Abstract

Al 2 O 3 filters for CO 2 gas separation were prepared by slip casting method. Average pore size and porosity of the obtained Al 2 O 3 filters were about 74 nm and 40%, respectively. To evaluate the pore size effect, the Al 2 O 3 filters having average pore size of 760 nm were also prepared. FE-SEM micrographs show fine new crystals on the pore surface. They were synthesized by hydrothermal treatment, and were identified to AlOOH by XRD and XPS. Both gas selectivity of the filter having larger pore size were about 1, which indicated that this filter has no gas separation capability. In contrast, the gas selectivity of the Al 2 O 3 filter with 74 nm pores became about 1.47 at 0.01 MPa. The N 2 /CO 2 gas selectivity was improved by controlling the pore size and the chemical properties of a pore surface precisely and by setting an appropriate gas permeation pressure.

Details

ISSN :
21870764
Volume :
1
Database :
OpenAIRE
Journal :
Journal of Asian Ceramic Societies
Accession number :
edsair.doi.dedup.....8903ef8028cea471fd9d05802feb3f15