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Hollow fibre La0.6Sr0.4Co0.2Fe0.8O3-Δ mixed conducting membranes for oxygen separation and methane combustion

Lookup NU author(s): Dr Alan Thursfield, Professor Ian Metcalfe


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To test the concept of CO2 capture using metal oxide membrane technology, mixed ionic-electronic conductivity La0.6Sr0.4Co0.2Fe0.8O3-δ hollow fiber membranes were fabricated and tested for oxygen separation at 500°-1000°C. The hollow fibers were used in small bundles in shell and shell-less modules to compare the oxygen separation performances using oxygen supplied to the shell-side at different flow rates and when non-flowing oxygen from the atmosphere is used. At higher temperatures of operation, the oxygen flux was mass transfer limited as this flux was dependent upon the gas flow rates employed on either side of the membrane. In this way flow rates could be used to manipulate the transmembrane oxygen flux. Initial experiments to increase the transmembrane flux showed that at low temperatures, the application of a porous catalyst film on the membrane outer-surface could improve the flux markedly. In experiments in which the modules were used for methane oxidation, the product distribution was dependent upon the oxygen flux with CO and H2 production being favored at low fluxes and CO2 and water production being favored at higher fluxes. At low oxygen flowrates, periodic increases in the transmembrane oxygen flux were observed. This is an abstract of a paper presented at the 2006 AIChE National Meeting (San Francisco, CA 11/12-17/2006).

Publication metadata

Author(s): Thursfield A, Metcalfe IS

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: AIChE Annual Meeting

Year of Conference: 2006

Pages: 1p

Library holdings: Search Newcastle University Library for this item

ISBN: 9780816910120