Gas transport properties of CoAlPO4-5/PC membranes

Citation
Sh. Chen et al., Gas transport properties of CoAlPO4-5/PC membranes, J APPL POLY, 77(1), 2000, pp. 89-95
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science","Material Science & Engineering
Journal title
JOURNAL OF APPLIED POLYMER SCIENCE
ISSN journal
0021-8995 → ACNP
Volume
77
Issue
1
Year of publication
2000
Pages
89 - 95
Database
ISI
SICI code
0021-8995(20000705)77:1<89:GTPOCM>2.0.ZU;2-7
Abstract
The transport phenomena of oxygen and nitrogen across a pure polycar bonate (PC) and CoAlPO4-5/PC membranes were studied. Various CoAlPO4-5 membranes with different cobalt content were added to polycarbonate membranes to impr ove the gas transport performance. Oxygen and nitrogen isotherms were studi ed. Solubility of oxygen and nitrogen was greatly increased by adding CoAlP O4-5 to the membranes, which also resulted in a higher solubility ratio of oxygen to nitrogen. It might be that a pinhole of the membrane caused the i ncrease in diffusivity and a decrease in selectivity when excess CoAlPO4-5 was added. The results also showed that CoAlPO4-5 with a higher cobalt cont ent would more effectively increase the gas solubility, but make only a min or change in the solubility ratio of oxygen to nitrogen. It was found that the increase in oxygen to nitrogen selectivity was mainly due to an increas ed diffusivity ratio of oxygen to nitrogen when CoAlPO4-5 was added into th e membranes. (C) 2000 John Wiley & Sons, Inc.