Title: Composite oxygen transport membrane

Abstract

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.

Inventors:

Christie, Gervase Maxwell; Lane, Jonathan A.

Issue Date:

2014-08-05

Research Org.:

NETL (National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV (United States))

Sponsoring Org.:

USDOE

OSTI Identifier:

1150016

Patent Number(s):

8,795,417

Application Number:

13/644,666

Assignee:

Praxair Technology, Inc. (Danbury, CT)

DOE Contract Number:  

FC26-07NT43088

Resource Type:

Patent

Resource Relation:

Patent File Date: 2012 Oct 04

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY