Membrane systems containing an oxygen transport membrane and catalyst
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-008/02
B01J-008/04
B01D-053/22
B01D-059/12
B01D-059/00
출원번호
US-0154704
(2002-05-24)
발명자
/ 주소
Besecker,Charles J.
Mazanec,Terry J.
Xu,Sherman J.
Rytter,Erling
출원인 / 주소
BP Corporation North America Inc.
인용정보
피인용 횟수 :
34인용 특허 :
31
초록▼
An apparatus for separating oxygen from an oxygen-containing gas and facilitating a chemical reaction with the separated oxygen includes a mixed conducting membrane, a porous body, and a material for catalyzing the reaction. The mixed conducting membrane has respective oxidation and reduction surfa
An apparatus for separating oxygen from an oxygen-containing gas and facilitating a chemical reaction with the separated oxygen includes a mixed conducting membrane, a porous body, and a material for catalyzing the reaction. The mixed conducting membrane has respective oxidation and reduction surfaces and is made of a non-porous, gas-impermeable, solid material capable of simultaneously conducting oxygen ions and electrons. At least the membrane and the catalyzing material are non-reactive with each other or are physically separated from each other during oxygen separation and the chemical reaction. The apparatus can be embodied by tubes, and a plurality of such tubes can form part of a reaction vessel in which various chemical reactions can occur benefiting from the apparatus design.
대표청구항▼
What is claimed is: 1. An apparatus for separating oxygen from an oxygen-containing gas and facilitating a chemical reaction with the separated oxygen, the apparatus comprising: (a) a mixed conducting membrane having opposed oxidation and reduction surfaces, the membrane comprising a non-porous, ga
What is claimed is: 1. An apparatus for separating oxygen from an oxygen-containing gas and facilitating a chemical reaction with the separated oxygen, the apparatus comprising: (a) a mixed conducting membrane having opposed oxidation and reduction surfaces, the membrane comprising a non-porous, gas-impermeable, solid material or mixture of solid materials capable of simultaneously conducting oxygen ions and electrons; (b) a porous body comprising one or more substances selected from the group consisting of alumina, (AL2O3), silica (SiO2), ceria (CeO2), zirconia (ZrO2) titania (TIO2), magnesium oxide (MgO), and mixtures thereof, and optionally one or more dopants selected from the group consisting of alkaline earth metals, lanthanum, and lanthanide series metals; and, (c) a material for catalyzing the reaction, the material disposed between the reduction surface and the porous body, wherein the membrane, the catalyzing material, and the porous body are constructed of different substances, and wherein the catalyzing material is non-reactive with the membrane at conditions experienced during the oxygen separation and the chemical reaction. 2. The apparatus of claim 1, wherein the solid material or mixture of solid materials is a perovskite having the general formula: description="In-line Formulae" end="lead"ABO 3description="In-line Formulae" end="tail" wherein A is selected from a group consisting of a Group II metal, calcium, strontium, barium, yttrium, lanthanum, a lanthanide series metal, an actinide series metal, and a mixture thereof; and, B is selected from a group consisting of iron, manganese, chromium, vanadium, titanium, copper, nickel, cobalt, and a mixture thereof. 3. The apparatus of claim 1, wherein the membrane has a thickness (T) defined by the distance between the reduction and oxidation surfaces of about 0.001 millimeters (mm) to about 10 mm. 4. The apparatus of claim 3, wherein the catalyzing material is disposed at a distance (D) away from the reduction surface defined by description="In-line Formulae" end="lead"D=x (T), description="In-line Formulae" end="tail" where x is 0 to 20. 5. The apparatus of claim 1, wherein the catalyzing material and porous body are contiguous. 6. The apparatus of claim 1, wherein the catalyzing material and the membrane are contiguous. 7. The apparatus of claim 1, wherein the catalyzing material comprises one or more active metals selected from the group consisting of iron, ruthenium, cobalt, rhodium, nickel, palladium, platinum, copper, silver, gold, and mixtures thereof. 8. The apparatus of claim 7, wherein the catalyzing material comprises nickel. 9. The apparatus of claim 8, wherein the catalyzing material comprises about 1 wt. % to about 20 wt. % nickel, based on the total weight of catalyzing material. 10. The apparatus of claim 7, wherein the catalyzing material has a surface area (AC), and the ratio of active metal to the surface area is at least about 0.001 grams per square meter (g/m2 ). 11. The apparatus of claim 10, wherein the ratio of active metal to the surface area is at least about 0.05 g/m2. 12. The apparatus of claim 1, wherein the reduction surface has a surface area (AR), and wherein the catalyzing material has a surface area (AC) defined by description="In-line Formulae" end="lead"AC =y(AR),description="In-line Formulae" end="tail" where y is 0.01 to 1000. 13. The apparatus of claim 1, wherein the porous body has a plurality of pores having a mean diameter of at least about five microns. 14. The apparatus of claim 1, wherein the porous body has a porosity of about 25% to about 98%. 15. The apparatus of claim 14, wherein the porous body has a porosity of about 50% to about 95%. 16. The apparatus of claim 15, wherein the porosity of the porous body is about 70% to about 92%. 17. The apparatus of claim 1, wherein the catalyzing material has a surface area (AC) of at least 0.1 square meters/gram (m 2/g). 18. The apparatus of claim 17, wherein the surface area (A C) is at least 1.0 m2/g. 19. The apparatus of claim 18, wherein the surface area (A C) is at least 10 m2/g. 20. An apparatus for separating oxygen from an oxygen-containing gas and facilitating a chemical reaction with the separated oxygen, the apparatus comprising: (a) a mixed conducting membrane having opposed oxidation and reduction surfaces, the membrane comprising a non-porous, gas-impermeable, solid material or mixture of solid materials capable of simultaneously conducting oxygen ions and electrons; (b) a porous body comprising one or more substances selected from the group consisting of alumina, (AL2O3), silica (SiO2), ceria (CeO2), zirconia (ZrO2), titania (TiO2), magnesium oxide MgO), and mixtures thereof, and optionally one or more dopants selected from the group consisting of alkaline earth metals, lanthanum, and lanthanide series metals; c) a material for catalyzing the reaction which is non-reactive with the membrane at conditions experienced during the oxygen separation and the chemical reaction, the material disposed between the reduction surface and the porous body, but not in physical contact with the reduction surface; and, (d) optionally, one or more spacers disposed between the reduction surface and the catalyzing material, wherein the membrane, the catalyzing material, and the porous body are constructed of different substances. 21. The apparatus of claim 20, wherein the catalyzing material and the membrane are reactive with respect to each other at conditions experienced during the oxygen separation and chemical reaction. 22. The apparatus of claim 21, wherein the catalyzing material and porous body are contiguous.
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