Composite materials for membrane reactors

Details Composite materials for membrane reactors Composite materials for membrane reactors

C - Chemistry, Metallurgy

01

B

C01B 13/02 (2006.01) B01D 53/22 (2006.01) B01D 53/32 (2006.01) B01D 71/02 (2006.01) B01J 19/24 (2006.01) C01B 3/36 (2006.01)

Patent

CA 2336880

Composite materials of the invention, which include a gas-tight ceramic, a porous metallic support, and an interfacial zone therebetween eliminate the need for mechanical seals between two such dissimilar materials. Oxygen ion- conducting dense ceramic membranes are formed on a porous metallic alloy to provide an interfacial zone identifiable by a gradient of composition in at least one metallic element across the interfacial zone between the dense ceramic membrane and the porous support. Processes using composite materials in accordance with the invention are, for example, used for production of synthesis gas comprising carbon monoxide and molecular hydrogen, whereby the synthesis gas is, advantageously, free of deleterious and/or inert gaseous diluents such as nitrogen.

L'invention concerne des matériaux composites qui comprennent une céramique étanche au gaz, un support métallique poreux et une zone interface entre les deux qui évite de se servir de joints mécaniques entre deux matériaux aussi dissemblables que les susmentionnés. Des membranes céramiques denses conductrices d'ions oxygène sont formées sur un alliage métallique poreux en vue de fournir une zone interface identifiable par un gradient de composition dans au moins un élément métallique à travers la zone interface entre la membrane céramique dense et le support poreux. Les procédés utilisant des matériaux composites conformément à cette invention sont, par exemple, utilisés pour la production de gaz de synthèse comprenant du monoxyde de carbone et de l'hydrogène moléculaire, où le gaz de synthèse est, avantageusement, libre de diluants gazeux inertes et/ou délétères tels que l'azote.

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