Patent ID: 6033632
Filing Date: 2000-03-07
Classification: B01D,B01J,C01B,C01C,H01M,Y02E,Y02P

Abstract:
A solid state membrane for use in a catalytic membrane reactor which comprises:a reduction surface which in operation in a catalytic membrane reactor contacts an oxygen-containing gas and an oxidation surface which in operation in a catalytic membrane reactor contacts a reactant gas, a partial vacuum or an oxygen-depleted gas,wherein said membrane is fabricated from a mixed metal oxide having the stoichiometry:A.sub.2-x A'.sub.x B.sub.2-y B'.sub.y O.sub.5+zwhere: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 an 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.