Device for reducing dibenzodioxin emissions, dibenzofuran emissions and particle emissions
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01N-003/10
B01D-047/00
출원번호
US-0355922
(2009-01-19)
등록번호
US-8171727
(2012-05-08)
우선권정보
DE-10 2008 008 785 (2008-02-12)
발명자
/ 주소
Döring, Andreas
출원인 / 주소
MAN Truck & Bus AG
대리인 / 주소
Cozen O'Connor
인용정보
피인용 횟수 :
1인용 특허 :
11
초록▼
A transition metal-containing catalyzer is arranged on a particle filter installed in the exhaust gas line of an internal combustion engine and cannot be separated therefrom without being destroyed. To reduce emissions, at least one molecular sieve which retains polychlorinated dibenzodioxins and po
A transition metal-containing catalyzer is arranged on a particle filter installed in the exhaust gas line of an internal combustion engine and cannot be separated therefrom without being destroyed. To reduce emissions, at least one molecular sieve which retains polychlorinated dibenzodioxins and polychlorinated dibenzofurans is arranged between the transition metal-containing catalyzer and the exhaust gas outlet. Further, the input side of the molecular sieve and/or the output side of the catalyzer has an oxidation activity for hydrocarbons, polychlorinated dibenzodioxins and polychlorinated dibenzofurans upstream of the molecular sieve.
대표청구항▼
1. Apparatus for installation in an exhaust gas line of an internal combustion engine, the exhaust gas line having an input and an output, the apparatus comprising: a particle filter;a transition metal-containing catalyzer arranged on the particle filter;a molecular sieve arranged between the transi
1. Apparatus for installation in an exhaust gas line of an internal combustion engine, the exhaust gas line having an input and an output, the apparatus comprising: a particle filter;a transition metal-containing catalyzer arranged on the particle filter;a molecular sieve arranged between the transition metal-containing catalyzer and the output, the molecular sieve having pore diameters in the range between 3 Å and 12 Å; andmeans for oxidizing at least one of hydrocarbons, polychlorinated dibenzodioxins, and polychlorinated dibenzofurans upstream of the molecular sieve. 2. The apparatus of claim 1 wherein the transition metal-containing catalyzer is arranged on the particle filter between the particle filter and the input; andthe molecular sieve comprises a molecular sieve layer on the particle filter between the particle filter and the output. 3. The apparatus of claim 1 wherein the transition metal-containing catalyzer is arranged on the particle filter between the particle filter and the output; andthe molecular sieve is comprises a molecular sieve layer arranged on the transition metal-containing catalyzer between the transition metal-containing catalyzer and the output. 4. The apparatus of claim 1 wherein the particle filter comprises at least one of metal, sintered metal, ceramic, foam, ceramic fibers, quartz fibers, glass fibers, silicon carbide, and aluminum titanate. 5. The apparatus of claim 1 wherein the transition metal-containing catalyzer contains at least one transition metal selected from the group consisting of copper, iron, and cobalt. 6. The apparatus of claim 1 wherein the transition metal-containing catalyzer is a catalyzer for the selective catalytic reduction of nitric oxides in the exhaust gas by means of at least one of ammonia and reducing agents split off from ammonia. 7. The apparatus of claim 1 wherein the transition metal-containing catalyzer contains zeolite. 8. The apparatus of claim 7 wherein the zeolite is one of an MFI zeolite and a BEA zeolite. 9. The apparatus of claim 1 wherein the molecular sieve is based on at least one of zeolites, silicates, metal silicates, aluminates, metal aluminates, silicophosphates, metal silicophosphates, silicoaluminophosphates, aluminophosphates, metal aluminophosphates, and aluminum silicates. 10. The apparatus of claim 1 wherein the molecular sieve comprises at least one zeolite framework selected from the group consisting of AEN, OSI, EPI, ERI, FAU, OFF, MFI, LTL, VFI, MAZ, MEI, EMT, CHA, KFI, BEA, MFS, MEL, MTW, EUO, MTT, HEU, FER, TON, and MOR. 11. The apparatus of claim 1 wherein the molecular sieve comprises at least one zeolite selected from the group consisting of Mordenite, Epistilbite, Chabazite, Erionite, Mazzite, Ferrierite, Faujasite, Offretite, ZSM-3, ZSM-4, ZSM-5, ZSM-12, ZSM-18, ZSM-20, ZSM-22, ZSM-23, ZSM-34, ZSM-35, ZSM-38, ZSM-48, ZSM-50, Omega, Beta, Zeolite A, Zeolite L, Zeolite Y, Zeolite X, ZK-4, ZK-5, ZK-14, ZK-20, ZK-21, and ZK-22. 12. The apparatus of claim 1 wherein the transition metal-containing catalyzer has at least one of a higher porosity and a larger average pore size than the molecular sieve. 13. The apparatus of claim 1 wherein the means for oxidizing at least one of hydrocarbons, polychlorinated dibenzodioxins, and polychlorinated dibenzofurans is provided on the molecular sieve. 14. The apparatus of claim 1 wherein the means for oxidizing at least one of hydrocarbons, polychlorinated dibenzodioxins, and polychlorinated dibenzofurans is provided on the surface transition metal-containing catalyzer. 15. The apparatus of claim 1 wherein the means for oxidizing at least one of hydrocarbons, polychlorinated dibenzodioxins, and polychlorinated dibenzofurans is provided as a discrete layer between the transition metal-containing catalyzer and the molecular sieve. 16. The apparatus of claim 1 wherein the means for oxidizing at least one of hydrocarbons, polychlorinated dibenzodioxins, and polychlorinated dibenzofurans contains at least one element selected from the group consisting of the platinum group, tungsten, titanium, lanthanum, molybdenum, cerium, manganese, and vanadium. 17. The apparatus of claim 1 wherein at least two of the means for oxidizing at least one of hydrocarbons, polychlorinated dibenzodioxins, and polychlorinated dibenzofurans; the transition metal-containing catalyzer; and the molecular sieve are connected and cannot be separated without being destroyed. 18. The apparatus of claim 1 wherein at least one of the means for oxidizing at least one of hydrocarbons, polychlorinated dibenzodioxins, and polychlorinated dibenzofurans; the transition metal-containing catalyzer; and the molecular sieve is arranged on a separate structural component. 19. The apparatus of claim 1 wherein the molecular sieve has a thickness between least 3 Å and 5 μm. 20. The apparatus of claim 1 wherein the transition metal-containing catalyzer is a layer arranged on the particle filter, the layer having a thickness of 5 μm to 500 μm. 21. The apparatus of claim 1 wherein the means for oxidizing is arranged at the upstream side of the molecular sieve. 22. A method for producing an apparatus for installation in the exhaust gas line of an internal combustion engine, the exhaust gas line having an inlet and an outlet, the method comprising: providing a particle filter;coating the particle filter with a layer containing a transition metal-containing catalyzer; andarranging on the transition metal-containing catalyzer a layer constituting a molecular sieve, the molecular sieve having pore diameters in the range between 3 Å and 12 Å. 23. The method of claim 22 wherein the particle filter is a ceramic or metal particle filter, the method further comprising changing the concentration of at least one transition metal in a surface of the catalyzer facing the output by ion exchange for a metal which can oxidize at least one of hydrocarbons, polychlorinated dibenzodioxins, and polychlorinated dibenzofurans, the surface being arranged at an upstream side of the molecular sieve.
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이 특허에 인용된 특허 (11)
Takeshima Shinichi (Shizuoka JPX), Catalyst for purifying exhaust gas and a method of producing the same.
Speronello Barry K. (Belle Mead NJ) Byrne John W. (Edison NJ) Chen James M. (Edison NJ), Staged metal-promoted zeolite catalysts and method for catalytic reduction of nitrogen oxides using the same.
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