Organic-inorganic CO2 selective membranes prepared by the sol-gel process

by C. Nistor, S. Shishatskiy, M. Popa, S.P. Nunes
Year: 2009 ISSN: DOI: 10.1080/01496390903212698

Bibliography

Organic-inorganic CO2 selective membranes prepared by the sol-gel process
C. Nistor, S. Shishatskiy, M. Popa, S.P. Nunes
Sep. Sci. Tech. 44, 3392-3411, (2009)

Abstract

Pub_2009_OIS

Composite membranes prepared from mixtures of 3-glycidoxypropyl trimethoxysilane (GPTMS) and different diamines containing polyether segments were synthesized by the sol-gel process. The membranes were obtained by coating asymmetric porous polyacrylonitrile (PAN) supports with the silane solutions. The composite membranes were characterized by single and mixed gas permeation and by atomic force microscopy. The selectivity increased by increasing the molecular weight of the poly(propylene glycol)-block-poly(ethylene glycol)-block-poly(propylene glycol)bis(2-aminopropyl ether) (PAPE), and also with the addition of poly(ethylene glycol) (PEG) to the coating solution. The CO2/N2 selectivity values up to 75 and the CO2/CH4 selectivity values up to 20 were measured. High gas selectivity was also confirmed by measurements with mixed gas feed, although slightly lower than in the measurements with single gases.

Keywords

CO2/N2 separation Epoxy silane Gas separation Organic-inorganic membranes Sol-gel