Composite mixed conductor membranes for producing oxygen

Details Composite mixed conductor membranes for producing oxygen Composite mixed conductor membranes for producing oxygen

B - Operations, Transporting

01

D

B01D 71/02 (2006.01) C01B 13/02 (2006.01)

Patent

CA 2105735

The present invention relates to novel multi-layer composite solid state membranes which are capable of separating oxygen from oxygen-containing gaseous mixtures at elevated temperatures. The membranes comprise a multicomponent metallic oxide porous layer having an average pore radius of less than about 10 micrometers and a multicomponent metallic oxide dense layer having no connected through porosity wherein the porous and dense layers are contiguous and such layers conduct electrons and oxygen ions at operating temperatures.

La présente invention concerne de nouvelles membranes composites multicouche à l'état solide capables de séparer l'oxygène des mélanges gazeux contenant de l'oxygène à des températures élevées. Les membranes comprennent une couche multiconstituant poreuse d'oxyde métallique ayant un rayon moyen des pores inférieur à environ 10 micromètres et une couche multiconstituant d'oxyde métallique dense dépourvue de porosité de part en part; les couches poreuses et denses sont contiguës et conduisent les électrons et les ions oxygène aux températures de fonctionnement.

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