Patent ID: 6214757
Filing Date: 2001-04-10
Classification: B01D,B01J,C01B,C01C,H01M,Y02E,Y02P

Abstract:
A process for oxidizing a reactant gas capable of reacting with oxygen which comprises the steps of:(A) providing a catalytic membrane reactor cell comprising an oxidation zone and a reduction zone separated by a gas-impermeable membrane having a reduction surface and an oxidation surface;(B) heating said reactor cell to a temperature of from about 300.degree. C. to about 1200.degree. C.;(C) passing an oxygen-containing gas in contact with the reduction surface of said membrane of said heated reactor in said reduction zone; and(D) providing said reactant gas in contact with the oxidation surface of said membrane of said heated reactor in said oxidation zone;wherein the membrane comprises:a reduction surface and an oxidation surface and wherein said membrane comprises a mixed metal oxide material having the general stoichiometry A.sub.2-x A'.sub.x B.sub.2-y B'.sub.y O.sub.5+z where:A is an alkaline earth metal ion or mixture of alkaline earth metal ions;A' is a metal ion or mixture of metal ions where the metal is selected from the group consisting of the lanthanide series or is yttrium;B is a metal ion or mixture of metal ions wherein the metal is selected from the group consisting of 3d transition metals, and the group 13 metals;B' is a metal ion or mixture of metal ions where the metal is selected from the group consisting of the 3d transition metals, the group 13 metals, the lanthanides and yttrium;x is a number greater than or equal to 0 and less than or equal to 2;y is a number greater than or equal to 0 and less than or equal to 2; andz is a number greater than zero and less than one that renders the compound charge neutral.