Composite oxygen transport membrane

Patent · Tue Aug 05 04:00:00 EDT 2014

OSTI ID:1150016

Christie, Gervase Maxwell; Lane, Jonathan A.

A method 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. In the porous fuel oxidation layer and the optional porous surface exchange layer, A is Calcium and in the dense separation layer A is not Calcium and, preferably is Strontium. Preferred materials are (La.sub.0.8Ca.sub.0.2).sub.0.95Cr.sub.0.5Mn.sub.0.5O.sub.3-.delta. for the porous fuel oxidation and optional porous surface exchange layers and (La.sub.0.8Sr.sub.0.2).sub.0.95Cr.sub.0.5Fe.sub.0.5O.sub.3-.delta. for the dense separation layer. The use of such materials allows the membrane to sintered in air and without the use of pore formers to reduce membrane manufacturing costs. The use of materials, as described herein, for forming the porous layers have application for forming any type of porous structure, such as a catalyst support.

• Research Organization: NETL (National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV (United States))
• Sponsoring Organization: USDOE
• DOE Contract Number: FC26-07NT43088
• Assignee: Praxair Technology, Inc. (Danbury, CT)
• Patent Number(s): 8,795,417
• Application Number: 13/644,666
• OSTI ID: 1150016
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY