초록 ▼

This invention relates to gas-impermeable, solid state materials fabricated into membranes for use in catalytic membrane reactors. This invention particularly relates to solid state oxygen anion- and electron-mediating membranes for use in catalytic membrane reactors for promoting partial or full ox

This invention relates to gas-impermeable, solid state materials fabricated into membranes for use in catalytic membrane reactors. This invention particularly relates to solid state oxygen anion- and electron-mediating membranes for use in catalytic membrane reactors for promoting partial or full oxidation of different chemical species, for decomposition of oxygen-containing species, and for separation of oxygen from other gases. Solid state materials for use in the membranes of this invention include mixed metal oxide compounds having the brownmillerite crystal structure.

대표청구항 ▼

[ We claim:] [1.] 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 ga

[ We claim:] [1.] 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, rein said membrane is fabricated from a mixed metal oxide having the stoichiometry:EQU A.sub.2-x A'.sub.x B.sub.2-y B'.sub.y O.sub.5+z re: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. [15.] A catalytic membrane reactor for separating oxygen from an oxygen-containing gas which comprises a reactor cell having a reduction zone and an oxidation zone separated by a membrane as in claim 1. A catalytic membrane reactor for separating oxygen from a mixture of gases containing oxygen which comprises:a reduction zone;a plurality of reactor cells each having a membrane as in claim 1 and each having an oxidation zone separated from said reduction zone by said membrane;a shell which contains the reactor cells;an entrance port in said shell for introduction of said mixture of gases containing oxygen into said reduction zone and an exit port in said shell for removal of reacted gas from said reduction zone; anda means for removal of separated oxygen gas from said oxidation zones;said reactor cells positioned within the shell so that the shell, the reactor cells and the membranes of the reactor cells together form the reduction zone which is separated from the oxidation zones of said reactors by said membranes. The membrane of claim 1 wherein, in said mixed metal oxide, B is a mixture of Ga and Al. The membrane of claim 1 wherein, in said mixed metal oxide, B' is Fe, Mn or a combination thereof. The membrane of claim 1 wherein x is about 0.2 to about 0.8.