Catalyst and method for oxidizing oxygen-containing organic compounds in waste gas
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-053/44
출원번호
US-0730730
(1996-10-15)
발명자
/ 주소
Ziebarth Michael Scott
Libanati Cristian
Uberoi Mohit
출원인 / 주소
Megtec Systems, Inc.
대리인 / 주소
Bittman
인용정보
피인용 횟수 :
17인용 특허 :
21
초록▼
The present invention generally relates to supported perovskites of the formula XYO.sub.3 where X is lanthanum, cerium or yttrium and Y is a transition metal such as copper, chromium, manganese, iron, cobalt and nickel supported on a support such as alumina, silica, magnesium aluminate, titanium oxi
The present invention generally relates to supported perovskites of the formula XYO.sub.3 where X is lanthanum, cerium or yttrium and Y is a transition metal such as copper, chromium, manganese, iron, cobalt and nickel supported on a support such as alumina, silica, magnesium aluminate, titanium oxide, zirconium oxide and mixtures thereof. In the case where X is lanthanum, some of the lanthanum ions may be replaced resulting in a perovskite of the formula La.sub.1-x A.sub.x YO.sub.3 wherein x is about 0.75 or less and A is silver or magnesium and Y is manganese or iron. Their use for low temperature oxidation of volatile organic compounds (VOCs), particularly oxygen-containing VOCs. The support may be stabilized by having an intermediate metal oxide layer on the surface of the support wherein the metal of the intermediate metal oxide may be iron, magnesium, cobalt, nickel, manganese, zinc, titanium, copper, chromium, lanthanum, barium, calcium, strontium or silver. The catalysts contain platinum or palladium. The present invention further relates to the use of supported perovskites to reduce the amount of VOCs present in waste gases produced by processes such as baking, brewing, and flexographic printing. Catalysts prepared from the supported perovskites have increased resistance to poisoning in the presence of sulfur containing compounds.
대표청구항▼
[ What is claimed is:] [1.] A method for reducing the concentration of volatile organic compounds (VOCs) in an O.sub.2 containing waste gas in the presence of sulfur oxides comprising contacting said waste gas comprising sulfur oxides and at least one VOC with a catalyst consisting essentially of an
[ What is claimed is:] [1.] A method for reducing the concentration of volatile organic compounds (VOCs) in an O.sub.2 containing waste gas in the presence of sulfur oxides comprising contacting said waste gas comprising sulfur oxides and at least one VOC with a catalyst consisting essentially of an aluminum oxide support; a perovskite on the surface of said aluminum oxide support, wherein the perovskite has the formula XYO.sub.3, wherein X is lanthanum, cerium or yttrium; and Y is a transition metal and either or both of platinum or palladium and oxidizing the volatile organic compounds.
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이 특허에 인용된 특허 (21)
Bouruetaubertot Alain (Paris FRX) Chopin Thierry (St. Denis FRX) Touret Olivier (Aubervilliers FRX), Alumina-based compositions and catalysts having high specific surface area.
Angwin Meredith J. (Palo Alto CA) Pfefferle William C. (Middletown NJ), Catalytic monolith, method of its formulation and combustion process using the catalytic monolith.
Bertolacini Ralph J. (Naperville IL) Hirschberg Eugene H. (Park Forest IL) Modica Frank S. (Downers Grove IL), Composition for removing sulfur oxides from a gas.
Chabot Jacqueline (Orsay FRX) Darras Raymond (Viroflay FRX) Gabilly Roger (Massy FRX) DE LA Perriere Gisele (Paris FRX), Oxidation reduction catalyst for the treatment of combustion gases and method for making the catalyst.
Han Scott (Lawrenceville NJ) DeCaul Lorenzo C. (Chester PA) Palermo Robert E. (Bloomfield NJ) Walsh Dennis E. (Richboro PA), Partial oxidation of methane over perovskite catalyst.
Ifrah, Simon; Larcher, Olivier; Jorge Coelho Marques, Rui; Lallemand, Michael; Hernandez, Julien, Composition including a lanthanum perovskite on an alumina or aluminium oxyhydroxide substrate, preparation method and use in catalysis.
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