Three way catalyst comprising extruded solid body
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-053/94
B01J-029/00
F01N-003/28
B01J-023/30
B01J-023/83
B01J-023/888
B01J-035/04
B01J-037/00
C04B-035/50
C04B-035/634
C04B-035/636
C04B-035/80
C04B-035/82
C04B-038/00
B01J-029/74
B01J-029/78
F01N-003/035
C04B-111/00
출원번호
US-0079210
(2013-11-13)
등록번호
US-9040003
(2015-05-26)
발명자
/ 주소
Andersen, Paul Joseph
Dotzel, Ralf
Koo, Kwangmo
Leppelt, Rainer
Münch, Jörg Werner
Rieck, Jeffery Scott
Schedel, Hubert
Winterborn, Duncan John William
Ballinger, Todd Howard
Cox, Julian Peter
출원인 / 주소
Johnson Matthey Public Limited Company
대리인 / 주소
Carroll, Kevin M.
인용정보
피인용 횟수 :
2인용 특허 :
19
초록▼
A three way catalyst includes an extruded solid body having by weight: 10-100% of at least one binder/matrix component; 5-90% of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof; and 0-80% optionally stabilised ceria. The catalyst also includes at le
A three way catalyst includes an extruded solid body having by weight: 10-100% of at least one binder/matrix component; 5-90% of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof; and 0-80% optionally stabilised ceria. The catalyst also includes at least one precious metal and optionally at least one non-precious metal, wherein: (i) the at least one precious metal is carried in one or more coating layer(s) on the body surface; (ii) at least one metal is present throughout the body and at least one precious metal is carried in one or more coating layer(s) on a body surface; or (iii) at least one metal is present throughout the body, is present in a higher concentration at a body surface, and at least one precious metal is carried in one or more coating layer(s) on the body surface.
대표청구항▼
1. A three-way catalyst comprising an extruded solid body comprising: 10-95% by weight of at least one binder/matrix component;5-90% by weight of an aluminosilicate zeolite having a silica-to-alumina ratio of 10 to 150; and0-80% by weight optionally stabilised ceria,which catalyst comprising at leas
1. A three-way catalyst comprising an extruded solid body comprising: 10-95% by weight of at least one binder/matrix component;5-90% by weight of an aluminosilicate zeolite having a silica-to-alumina ratio of 10 to 150; and0-80% by weight optionally stabilised ceria,which catalyst comprising at least two precious metals selected from the group consisting of Pd, Ag, and Rh and optionally at least one non-precious metal, wherein:(i) Pd and Rh are carried in one or more coating layer(s) on a surface of the extruded solid body;(ii) at least one of Pd and Ag is present throughout the extruded solid body and Pd and Rh are carried in one or more coating layer(s) on a surface of the extruded solid body; or(iii) at least one of Pd and Ag is present throughout the extruded solid body, at least one of Pd and Ag is present in a higher concentration at a surface of the extruded solid body and Pd and Rh are carried in one or more coating layer(s) on the surface of the extruded solid body. 2. A catalyst according to claim 1, wherein the at least one of Pd and Ag is present throughout the extruded solid body and is associated with the aluminosilicate zeolite. 3. A catalyst according to claim 2, wherein the extruded solid body further comprises at least one metal that is not associated with the aluminosilicate zeolite. 4. A three-way catalyst according to claim 1, wherein: the at least one binder/matrix component is selected from the group consisting of cordierite, nitrides, carbides, borides, intermetallics, lithium aluminosilicate, an optionally doped alumina, a silica source, titania, zirconia, titania-zirconia, zircon and mixtures of any two or more thereof; and the aluminosilicate zeolite optionally contains one or more metal; and the extruded solid body further comprises: 0-80% by weight of spinel; and 0-25% by weight inorganic fibres. 5. A three-way catalyst according to claim 1, wherein the extruded solid body consists essentially of: the at least one binder/matrix component; the aluminosilicate zeolite in an amount of 50-90% by weight; and 0-25% by weight of inorganic fibres, wherein the at least one binder/matrix component is selected from the group consisting of cordierite, nitrides, carbides, borides, intermetallics, lithium aluminosilicate, a spinel, an optionally doped alumina, a source of silica, titania, zirconia, titania-zirconia, zircon and mixtures of any two or more thereof; the aluminosilicate zeolite optionally contains one or more metal. 6. A three-way catalyst according to claim 1, wherein the extruded solid body consists essentially of: the at least one binder/matrix component; the aluminosilicate zeolite in an amount of 5-50% by weight; the optionally stabilised ceria in an amount of 20-80% by weight; and 0-25% by weight of inorganic fibres, wherein the at least one binder/matrix component is selected from the group consisting of a cordierite, nitrides, carbides, borides, intermetallics, lithium aluminosilicate, an optionally doped alumina, a spinel, a silica source, titania, zirconia, titania-zirconia, zircon and mixtures of any two or more thereof; the zeolitic molecular sieve, the aluminosilicate zeolite optionally contains one or more metal. 7. A three-way catalyst according to claim 1 in the form of a wall-flow filter. 8. A three-way catalyst according to claim 1 comprising the extruded solid body in the flow-through configuration, wherein the extruded solid body consists essentially of: the at least one binder/matrix component;the aluminosilicate zeolite in an amount of 50-81% by weight; and 0-20% by weight of inorganic fibres,whereinthe at least one binder/matrix component comprises 15-30% by weight of cordierite, nitrides, carbides, borides, intermetallics, lithium aluminosilicate, a spinel, an optionally doped alumina, titania, zirconia, titania-zirconia, zircon and mixtures of any two or more thereof and 0-20% by weight of a source of silica;the aluminosilicate zeolite optionally contains one or more metal; andthe extruded solid catalyst body is coated with a single layer comprising a mixture of γ-alumina and a stabilised ceria supporting Pd and Rh. 9. A three-way catalyst according to claim 1, wherein the aluminosilicate zeolite is selected from the group consisting of ZSM-5, beta, ferrierite and mixtures of any two or more thereof. 10. A three-way catalyst according to claim 1, wherein the catalyst comprises the at least one non-precious metal and the at least one non-precious metal is associated with the aluminosilicate zeolite. 11. A three-way catalyst according to claim 10, wherein the or each at least one non-precious metal associated with the aluminosilicate zeolite is selected from the group consisting of a transition metal, a lanthanide or a mixture of any two or more thereof. 12. A three-way catalyst according to claim 11, wherein the at least one non-precious metal is Cu. 13. A three-way catalysed soot filter comprising an extruded solid body in the wall-flow filter configuration, the extruded solid catalyst body consisting essentially of: 15-70% by weight of cordierite, nitrides, carbides, borides, intermetallics, lithium aluminosilicate, a spinel, an optionally doped alumina, titania, zirconia, titania-zirconia, zircon and mixtures of any two or more thereof; 0-20% by weight of a source of silica;5-50% by weight of an aluminosilicate zeolite having a silica-to-alumina ratio of 10 to 150, optionally containing one or more metal;20-80% by weight optionally stabilised ceria; and0-20% by weight of inorganic fibres,the extruded solid catalyst body being coated with one or more layer(s) comprising supported Pd and Rh. 14. A method of treating exhaust gas emissions from internal combustion engines from a stationary source or a vehicle, wherein said exhaust gas has HC, CO, and NOX, which method comprising oxidizing the HC and CO and reducing the NO by contacting the exhaust gas with a three-way catalyst according to claim 1. 15. An exhaust system for an internal combustion engine, which exhaust system comprising a three-way catalyst according to claim 1. 16. A three-way catalyst comprising: an extruded solid body comprising 10-95% by weight of at least one binder/matrix component;5-90% by weight of an aluminosilicate zeolite having a silica-to-alumina ratio of 10 to 150; and0-80% by weight optionally stabilised ceria, andone or more coating layers on a surface of the extruded solid body, theone or more coating layers comprising Pd and Rh. 17. The three-way catalyst of claim 16, wherein the extruded solid body further comprises Pd throughout the extruded solid body. 18. The three-way catalyst of claim 17, wherein the extruded solid body further comprises Ag throughout the extruded solid body. 19. The three-way catalyst of claim 18, wherein at least one of the Pd and Ag is present in a higher concentration at a surface of the extruded solid body. 20. The three-way catalyst of claim 16, wherein the extruded solid body further comprises Ag throughout the extruded solid body. 21. The three-way catalyst of claim 20, wherein the Ag is present in a higher concentration at a surface of the extruded solid body. 22. The three-way catalyst of claim 16, wherein the one or more coating layer(s) further comprises a mixed oxide of ceria-zirconia for supporting the Pd and Rh.
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이 특허에 인용된 특허 (19)
Pereira Carmo J. (Columbia MD) Hegedus Louis (Rockville MD) Maselli James M. (Columbia MD), Catalyst with high geometric surface area.
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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.
Lachman Irwin M. (Corning NY) Patil Mallanagouda D. (Corning NY) Socha ; Jr. Louis S. (Painted Post NY) Swaroop Srinivas H. (Painted Post NY) Wusirika Raja R. (Painted Post NY), Molecular sieve-palladium-platinum catalyst on a substrate.
Lachman Irwin M. (Corning NY) Patil Mallanagouda D. (Corning NY) Socha ; Jr. Louis S. (Painted Post NY) Swaroop Srinivas H. (Painted Post NY) Wusirika Raja R. (Painted Post NY), Process for removal of hydrocarbons carbon manoxide, and oxides of nitrogen from oxygen-containing waste gas using molec.
Strehlau, Wolfgang; Gerlach, Olga; Maier, Jürgen, Process for the removal of harmful substances from exhaust gases of combustion engines and catalyst for carrying out said process.
Chang Clarence D. (Princeton NJ) Santiesteban Jose G. (Yardley PA) Shihabi David S. (Pennington NJ) Stevenson Scott A. (Langhorne PA) Vartuli James C. (Westchester PA), Selective catalytic reduction of nitrogen oxides.
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