Ammonia SCR catalyst and method of using the catalyst
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-053/56
B01J-023/72
B01J-023/26
B01J-023/16
B01J-023/75
B01J-023/755
B01J-023/34
B01J-023/745
B01J-023/20
B01J-023/10
B01J-023/00
출원번호
UP-0651290
(2007-01-09)
등록번호
US-7527776
(2009-07-01)
발명자
/ 주소
Golden, Stephen J.
Iretskaya, Svetlana
출원인 / 주소
Catalytic Solutions, Inc.
대리인 / 주소
Reed Smith LLP
인용정보
피인용 횟수 :
17인용 특허 :
6
초록▼
A catalyst and a method for selectively reducing nitrogen oxides with ammonia are provided. The catalyst includes a first component of copper, chromium, cobalt, nickel, manganese, iron, niobium, or mixtures thereof, a second component of cerium, a lanthanide, a mixture of lanthanides, or mixtures th
A catalyst and a method for selectively reducing nitrogen oxides with ammonia are provided. The catalyst includes a first component of copper, chromium, cobalt, nickel, manganese, iron, niobium, or mixtures thereof, a second component of cerium, a lanthanide, a mixture of lanthanides, or mixtures thereof, and a zeolite. The catalyst may also include strontium as an additional second component. The catalyst and the method may have special application to selective reduction of nitrogen oxides in exhaust gas from diesel vehicles, although the catalyst and the method have broad application to a wide range of gas streams that contain nitrogen oxides.
대표청구항▼
What is claimed is: 1. A catalyst for selective catalytic reduction of nitrogen oxides with ammonia, the catalyst comprising: a first component comprising at least one selected from the group consisting of copper, chromium, cobalt, nickel, manganese, iron, niobium, and mixtures thereof; a second co
What is claimed is: 1. A catalyst for selective catalytic reduction of nitrogen oxides with ammonia, the catalyst comprising: a first component comprising at least one selected from the group consisting of copper, chromium, cobalt, nickel, manganese, iron, niobium, and mixtures thereof; a second component comprising at least one selected from the group consisting of cerium, a lanthanide, a mixture of lanthanides, and mixtures thereof; at least one zeolite and strontium. 2. A catalyst for selective catalytic reduction of nitrogen oxides with ammonia, the catalyst comprising: a first component comprising at least one selected from the group consisting of copper, chromium, cobalt, nickel, manganese, iron, niobium, and mixtures thereof; a second component comprising at least one selected from the group consisting of cerium, a lanthanide, a mixture of lanthanides, and mixtures thereof; at least one zeolite and an oxygen storage material. 3. The catalyst of claim 2, wherein the oxygen storage material is selected from the group consisting of Ce1-aZraO2 and Ce1-c-dZrcLandO2, wherein Lan is selected from the group consisting of Y, La, Pr, Nd, Sm, Eu, Gd, Ho, Yb and mixtures thereof. 4. A catalyst for selective catalytic reduction of nitrogen oxides with ammonia, the catalyst comprising: approximately 1 to approximately 20 weight percent of a first component, said first component comprising at least one selected from the group consisting of copper, chromium, cobalt nickel, manganese, iron, niobium, and mixtures thereof; approximately 2 to approximately 35 weight percent of a second component, said second component comprising at least one selected from the group consisting of cerium, a lanthanide, a mixture of lanthanides, and mixtures thereof; approximately 10 to approximately 90 weight % of at least one zeolite, and approximately 2 to approximately 35 weight percent of strontium, wherein the weight percent of the strontium is on the basis of strontium metal, and wherein the weight percentages of the first component and the second component are on the basis of the metals. 5. A catalyst composition comprising: a substrate; and a catalyst for selective catalytic reduction of nitrogen oxides with ammonia, the catalyst comprising: a first component comprising at least one selected from the group consisting of copper, chromium, cobalt, nickel, manganese, iron, niobium, and mixtures thereof; a second component comprising at least one selected from the group consisting of cerium, a lanthanide, a mixture of lanthanides, and mixtures thereof; at least one zeolite, and an oxygen storage material, wherein the catalyst is placed on the substrate. 6. The catalyst composition of claim 5, further comprising at least one inorganic oxide selected from the group consisting of alumina, silica, titania, and silica-alumina solutions, composites, and mixtures thereof, and wherein at least one of the zeolite, the oxygen storage material, and the inorganic oxide is placed on the substrate in a form of a washcoat. 7. A method for selective reduction of nitrogen oxides in a gas stream with ammonia, wherein the gas stream comprises nitrogen oxides, the method comprising: contacting the gas stream with ammonia in the presence of a catalyst, the catalyst comprising: a first component comprising at least one selected from the group consisting of copper, chromium, cobalt, nickel, manganese, iron, niobium, and mixtures thereof; a second component comprising at least one selected from the group consisting of cerium, a lanthanide, a mixture of lanthanides, and mixtures thereof; at least one zeolite and strontium. 8. A method for selective reduction of nitrogen oxides in a gas stream with ammonia, wherein the gas stream comprises nitrogen oxides, the method comprising: contacting the gas stream with ammonia in the presence of a catalyst, the catalyst comprising: a first component comprising at least one selected from the group consisting of copper, chromium, cobalt, nickel, manganese, iron, niobium, and mixtures thereof; a second component comprising at least one selected from the group consisting of cerium, a lanthanide, a mixture of lanthanides, and mixtures thereof; at least one zeolite and an oxygen storage material. 9. The method of claim 8, wherein the oxygen storage material is selected from the group consisting of Ce1-aZraO2 and Ce1-c-dZrcLandO2, wherein Lan is selected from the group consisting of Y, La, Pr, Nd, Sm, Eu, Gd, Ho, Yb and mixtures thereof. 10. A method for selective reduction of nitrogen oxides in a gas stream with ammonia, wherein the gas stream comprises nitrogen oxides, the method comprising: contacting the gas stream with ammonia in the presence of a catalyst, the catalyst comprising: a first component comprising at least one of the group consisting of copper, chromium, cobalt, nickel, manganese, iron, niobium, and mixtures thereof, a second component comprising at least one of the group consisting of cerium, a lanthanide, a mixture of lanthanides, and mixtures thereof, and at least one zeolite, wherein the catalyst comprises approximately 1 to approximately 20 weight percent of the first component, approximately 2 to approximately 35 weight percent of the second component, and approximately 10 to approximately 90 weight % of the at least one zeolite, wherein the weight percentages of the first component and the second component are on the basis of the metals, and approximately 2 to approximately 35 weight percent of strontium, wherein the weight percent of the strontium is on the basis of strontium metal.
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이 특허에 인용된 특허 (6)
Farnos Maria D. (Wilmington DE) McWilliams John P. (Woodbury NJ) Sharma Sanjay B. (Langhorne PA) Shihabi David S. (Pennington NJ), Catalytic system for the reducton of nitrogen oxides.
Ito Eri,JPX ; C.M. van den Bleek Cornelis Maria,NLX ; van Bekkum Herman H.,NLX ; J.C. Jansen Jacobus Cornelis,NLX ; R.J. Hultermans Ronald Johannes,NLX ; P. M. Lugt Pieter Martin,NLX, Process for treating nitrogen oxide-containing gas using a cerium zeolite.
Tran, Pascaline Harrison; Liu, Xinsheng; Liu, Ye; Galligan, Michael P.; Zhang, Qinglin; Horimura, Hiroyuki; Iwasa, Akiko, Base metal catalyst composition and methods of treating exhaust from a motorcycle.
Hatfield, Randal L.; Lee, Edward J.; Ngo, Johnny T.; Golden, Stephen J., Three-way catalyst systems including Fe-activated Rh and Ba-Pd material compositions.
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