Exhaust gas after-treatment system and method for the exhaust gas after-treatment
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-053/92
B01D-053/94
F01N-003/023
F01N-003/035
F01N-013/00
F01N-003/10
출원번호
US-0678640
(2015-04-03)
등록번호
US-9587539
(2017-03-07)
우선권정보
DE-10 2014 005 153 (2014-04-08)
발명자
/ 주소
Döring, Andreas
출원인 / 주소
MAN Diesel & Turbo SE
대리인 / 주소
O'Connor, Cozen
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
An exhaust gas after-treatment system for an internal combustion engine, with a particle filter arranged downstream of an internal combustion engine for filtering soot out of the exhaust gas, and with an oxidation catalytic converter arranged upstream of the particle filter and downstream of the int
An exhaust gas after-treatment system for an internal combustion engine, with a particle filter arranged downstream of an internal combustion engine for filtering soot out of the exhaust gas, and with an oxidation catalytic converter arranged upstream of the particle filter and downstream of the internal combustion engine for the oxidation of SO2 into SO3. The SO3 and/or precipitated H2SO4 serves for the oxidation of soot in the particle filter and thus for the regeneration of the particle filter.
대표청구항▼
1. An exhaust gas after-treatment system arranged in an exhaust gas flow of an internal combustion engine, comprising: a particle filter arranged downstream of the internal combustion engine configured to filter soot out of the exhaust gas; andan oxidation catalytic converter arranged upstream of th
1. An exhaust gas after-treatment system arranged in an exhaust gas flow of an internal combustion engine, comprising: a particle filter arranged downstream of the internal combustion engine configured to filter soot out of the exhaust gas; andan oxidation catalytic converter arranged upstream of the particle filter and downstream of the internal combustion engine configured to oxidize SO2 into SO3,wherein at least one of the SO3 and precipitated H2SO4 serves for oxidation of soot in the particle filter for regeneration of the particle filter based at least in part on a temperature of the exhaust gas. 2. The exhaust gas after-treatment system according to claim 1, wherein the oxidation catalytic converter comprises at least one of vanadium, sodium, iron, cerium, cesium, and oxides of these elements as active component for oxidation of SO2 into SO3,wherein the oxidation catalytic converter utilizes at least one of titanium oxide and silicon oxide as a base material. 3. The exhaust gas after-treatment system according to claim 1, wherein the oxidation catalytic converter active component comprises at least 5% vanadium. 4. The exhaust gas after-treatment system according to claim 1, wherein a mass ratio between SO3 and soot is at least 7:1 downstream of the oxidation catalytic converter, proximate to the particle filter. 5. The exhaust gas after-treatment system according to claim 1, further comprising: a turbine for an exhaust gas turbocharger,wherein the oxidation catalytic converter is arranged upstream of the turbine of the exhaust gas turbocharger and the particle filter is positioned downstream of the turbine. 6. The exhaust gas after-treatment system according to claim 1, further comprising: an oxidation catalytic converter for oxidation of NO into NO2 arranged upstream of the particle filter and downstream of the internal combustion engine,wherein the NO2 serves for the oxidation of soot in the particle filter and the regeneration of the particle filter. 7. The exhaust gas after-treatment system according to claim 6, wherein the oxidation catalytic converter for oxidation of NO into NO2 is connected parallel to the oxidation catalytic converter for oxidation of SO2 into SO3. 8. The exhaust gas after-treatment system according to claim 7, further comprising: shut-off valves configured to shut off at least one of the oxidation catalytic converter for the oxidation of NO into NO2 and the oxidation catalytic converter for oxidation of SO2 into SO3 from the exhaust gas flow based at least in part on the Sulphur content of a fuel provided to the internal combustion engine. 9. The exhaust gas after-treatment system according to claim 2, wherein the base material is stabilized by tungsten oxide. 10. The exhaust gas after-treatment system according to claim 3, wherein the oxidation catalytic converter active component comprises at least 9% vanadium. 11. The exhaust gas after-treatment system according to any one of the claim 4, wherein the mass ratio between SO3 and soot is at least 16:1. 12. A method for exhaust gas after-treatment of exhaust gas leaving an internal combustion engine, comprising: providing the exhaust gas to an oxidation catalytic converter for oxidation of SO2 into SO3;providing the exhaust gas, after oxidation by the oxidation catalytic converter, to a particle filter configured to filter soot out of the exhaust gas; andregenerating the particle filter by oxidation of soot in the particle filter with at least one of the SO3 formed in the oxidation catalytic converter and precipitated H2SO4 based at least in part on a temperature of the exhaust gas. 13. The method for exhaust gas after-treatment according to claim 12, wherein during operation of the internal combustion engine with a fuel having a high Sulphur content, shutting off the exhaust gas flow by shut-off valves to an oxidation catalytic converter for oxidation of NO into NO2 so the exhaust gas flow is provided to the oxidation catalytic converter for the oxidation of SO2 into SO3, andwherein during operation of the internal combustion engine with a fuel that has a relatively low Sulphur content, shutting off the exhaust gas flow by shut-off valves to the oxidation catalytic converter for the oxidation of SO2 into SO3 so the exhaust gas flow is provided to the oxidation catalytic converter for the oxidation of NO into NO2. 14. The method for exhaust gas after-treatment according to claim 13, wherein the high Sulphur content is a Sulphur content of the fuel above 1,000 ppm.
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이 특허에 인용된 특허 (2)
Neufert, Ronald; Witzel, Frank; Fischer, Stefan; Pajonk, G?nther, Method and device for reducing the number of particles in an exhaust gas.
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