Abstract:
An element for use in an electrochemical cell has a first zone for introducing an oxygen-containing gas and a second zone separated from first zone by the element, which has a membrane with first and second surfaces, conducts oxygen ions therebetween, and has a catalyst exposed to at least the first zone. The element may be used to separate oxygen.
Abstract:
Solid membranes comprising an intimate, gas-impervious, multi-phase mixture of an electronically-conductive material and an oxygen ion-conductive material and/or a mixed metal oxide of a perovskite structure are described. Electrochemical reactor cells and reactors are also described for transporting oxygen from any oxygen-containing gas to any gas that consumes oxygen. The reactor cells generally comprise first and second zones separated by the solid membrane. The reactor cell may further comprise a catalyst in the first zone. Processes described which may be conducted with the disclosed reactor cells and reactors include, for example, the partial oxidation of methane to produce unsaturated compounds or synthesis gas, the partial oxidation of ethane, extraction of oxygen from oxidized gases, ammoxidation of methane, etc. The extraction of oxygen from oxidized gases may be used for flue or exhaust gas clean-up.
Abstract:
Solid membranes comprising an intimate, gas-impervious, multi-phase mixture of an electronically-conductive material and an oxygen ion-conductive material and/or a mixed metal oxide of a perovskite structure are described. Electrochemical reactor cells and reactors are also described for transporting oxygen from any oxygen-containing gas to any gas that consumes oxygen. The reactor cells generally comprise first and second zones separated by the solid membrane. The reactor cell may further comprise a catalyst in the first zone. Processes described which may be conducted with the disclosed reactor cells and reactors include, for example, the partial oxidation of methane to produce unsaturated compounds or synthesis gas, the partial oxidation of ethane, extraction of oxygen from oxidized gases, ammoxidation of methane, etc. The extraction of oxygen from oxidized gases may be used for flue or exhaust gas clean-up.
Abstract:
A solid multi-component membrane for use in an electrochemical reactor characterized by a mixed metal oxide material having a perovskite structure comprising (1) a lanthanide, Y, or a combination of a lanthanide and Y, (2) at least one alkaline earth metal, (3) Fe, and (4) Cr, Ti or a combination of Cr and Ti. Also claimed is an element for use in an electrochemical reactor or reactor cell having a first surface capable of reducing oxygen to oxygen ions, a second surface capable of reacting oxygen ions with an oxygen-consuming gas, an electron-conductive path between the first and second surfaces and an oxygen ion-conductive path between the first and second surfaces characterized in that the element comprises (A) a mixed metal oxide material having a perovskite structure and (B) a conductive coating, a catalyst, or a conductive coating comprising a catalyst. The invention permits the carrying out of a number of electrochemical reactions.
Abstract:
A solid multi-component membrane for use in an electrochemical reactor characterized by a mixed metal oxide material having a perovskite structure comprising (1) a lanthanide, Y, or a combination of a lanthanide and Y, (2) at least one alkaline earth metal, (3) Fe, and (4) Cr, Ti or a combination of Cr and Ti. Also claimed is an element for use in an electrochemical reactor or reactor cell having a first surface capable of reducing oxygen to oxygen ions, a second surface capable of reacting oxygen ions with an oxygen-consuming gas, an electron-conductive path between the first and second surfaces and an oxygen ion-conductive path between the first and second surfaces characterized in that the element comprises (A) a mixed metal oxide material having a perovskite structure and (B) a conductive coating, a catalyst, or a conductive coating comprising a catalyst. The invention permits the carrying out of a number of electrochemical reactions.