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Composite oxygen transport membrane

Patent ·
OSTI ID:1331385
; ;

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
Country of Publication:
United States
Language:
English

References (10)

Stoichiometric lanthanum chromite based ceramic interconnects with low sintering temperature journal March 2006
Development of oxygen transport membranes for coal-based power generation journal January 2011
Development of interconnect materials for solid oxide fuel cells journal May 2003
Electrolysis of carbon dioxide in Solid Oxide Electrolysis Cells journal August 2009
Efficient Reduction of CO2 in a Solid Oxide Electrolyzer journal January 2008
Tubular zirconia–yttria electrolyte membrane technology for oxygen separation journal December 2002
Methods for the catalytic activation of metallic structured substrates journal January 2014
Thermomechanical, transport and anodic properties of perovskite-type (La0.75Sr0.25)0.95Cr1−xFexO3−δ journal May 2012
Freeze-Casting of Porous Ceramics: A Review of Current Achievements and Issues journal March 2008
Ion transport membrane technology for oxygen separation and syngas production journal October 2000

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Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY