Composite oxygen transport membrane
A method is described of producing a composite oxygen ion membrane and a composite oxygen ion membrane in which a porous fuel oxidation layer and a dense separation layer and optionally, a porous surface exchange layer are formed on a porous support from mixtures of (Ln.sub.1-xA.sub.x).sub.wCr.sub.1-yB.sub.yO.sub.3-.delta. and a doped zirconia. Preferred materials are (La.sub.0.8Sr.sub.0.2).sub.0.95Cr.sub.0.7Fe.sub.0.3O.sub.3-.delta. for the porous fuel oxidation layer, (La.sub.0.8Sr.sub.0.2).sub.0.95Cr.sub.0.5Fe.sub.0.5O.sub.3-.delta. for the dense separation layer, and (La.sub.0.8Sr.sub.0.2).sub.0.95Cr.sub.0.3Fe.sub.0.7O.sub.3-.delta. for the porous surface exchange layer. Firing the said fuel activation and separation layers in nitrogen atmosphere unexpectedly allows the separation layer to sinter into a fully densified mass.
- Research Organization:
- PRAXAIR TECHNOLOGY, INC. Danbury, CT (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC26-07NT43088
- Assignee:
- PRAXAIR TECHNOLOGY, INC. (Danbury, CT)
- Patent Number(s):
- 9,486,735
- Application Number:
- 14/856,038
- OSTI ID:
- 1331385
- Resource Relation:
- Patent File Date: 2015 Sep 16
- Country of Publication:
- United States
- Language:
- English
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