Solid state oxygen anion and electron mediating membrane and catalytic membrane reactors containing them
AssigneeEltron Research, Inc.
InventorsMichael Schwartz, James H. White, Anthony F. Sammells
Life of this patent
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Abstract
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.
Claims31
A solid state membrane for use in a catalytic membrane reactor which comprises:
- a mixed metal oxide having the stoichiometry:
- A2−xLaxB2−yFeyO5+z
- wherein A is an alkaline earth metal ion or mixture of alkaline earth metal ions, B is a metal ion or mixture of metal ions where the metal is selected from the group consisting of the 3d transition metals, or the group 13 metals, x and y, independently of one another, are numbers equal to or greater than zero and less than 2, and z is a number that renders the compound neutral.
A solid state membrane for use in a catalytic membrane reactor which comprises:
- a mixed metal oxide having the stoichiometry:
- Sr2−xLaxGa2−yCyO5+z
- where C is a 3d transition metal ion;
- x and y, independently of one another, are numbers equal to or greater than zero and less than 2, and z is a number that renders the compound neutral.
A solid state membrane for use in a catalytic membrane reactor which comprises:
- a mixed metal oxide having the stoichiometry:
- Sr2−xLaxGa2−yFeyO5+z
- wherein x and y, independently of one another, are numbers equal to or greater than zero and less than 2, and z is a number that renders the compound neutral.
Dependencies are inferred from the claim text.