IPC분류정보
국가/구분 |
United States(US) Patent
공개
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0093199
(2002-03-07)
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공개번호 |
US-0018132
(2004-01-29)
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발명자
/ 주소 |
- Bartley, Gordon James Johnston
- Sharp, Christopher Alan
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
0 |
초록
▼
An emission control system for reducing NOxin the exhaust of a diesel engine. A partial oxidation system receives diesel fuel from the engine's fuel tank and partially oxidizes the diesel fuel into hydrogen. The hydrogen is then introduced into the main exhaust line and the hydrogen-enhanced exhaust
An emission control system for reducing NOxin the exhaust of a diesel engine. A partial oxidation system receives diesel fuel from the engine's fuel tank and partially oxidizes the diesel fuel into hydrogen. The hydrogen is then introduced into the main exhaust line and the hydrogen-enhanced exhaust is delivered to a hydrogen selective catalytic reduction unit, which uses the hydrogen to convert the NOxto nitrogen.
대표청구항
▼
1. A system for treating NOemissions from a diesel engine having a main fuel line that carries diesel fuel to the engine and having a main exhaust line that carries exhaust from the engine, the system comprising:a partial oxidation unit operable to receive a portion of the diesel fuel from the main
1. A system for treating NOemissions from a diesel engine having a main fuel line that carries diesel fuel to the engine and having a main exhaust line that carries exhaust from the engine, the system comprising:a partial oxidation unit operable to receive a portion of the diesel fuel from the main fuel line, to partially oxidize the fuel to produce a gas mixture containing hydrogen, and to deliver the gas mixture to the main exhaust line; and a hydrogen selective catalytic reduction unit, located in-line on the main exhaust line and downstream of the partial oxidation unit, operable to use the hydrogen to continuously convert the NOx emissions in the exhaust line to nitrogen. 2. The system of claim 1, wherein the partial oxidation unit is a non-stoichiometric burner. 3. The system of claim 1, wherein the partial oxidation unit is a catalyst. 4. The system of claim 1, wherein the partial oxidation unit is a nickel-based catalyst. 5. The system of claim 1, wherein the partial oxidation unit is a rhodium-based catalyst. 6. The system of claim 1, wherein the partial oxidation unit is a combination of a non-stoichiometric burner and a catalyst. 7. The system of claim 1, further comprising an auxiliary fuel line that delivers the diesel fuel and air to the partial oxidation unit and an output line that delivers the gas mixture to the main exhaust line. 8. The system of claim 1, further comprising an auxiliary fuel line that delivers the diesel fuel to the partial oxidation unit, an input branch line from the main exhaust line to the partial oxidation unit, and an output branch line from the partial oxidation unit to the main exhaust line. 9. The system of claim 1, wherein the hydrogen selective catalytic reduction unit is ruthenium-based. 10. The system of claim 1, wherein the hydrogen selective catalytic reduction unit is platinum-based. 11. The system of claim 1, further comprising a water gas shift catalyst downstream of the partial oxidation unit, operable to generate further hydrogen from the gas mixture. 12. A method of treating the NOemissions from a diesel engine having a main fuel line that carries diesel fuel to the engine and a main exhaust line that carries exhaust from the engine, the method comprising the steps of:mixing a portion of diesel fuel from the main fuel line with air; receiving the mixed portion of diesel fuel and air into a partial oxidation unit; using the partial oxidation unit to partially oxidize the portion of diesel fuel into a gas mixture containing hydrogen; delivering the gas mixture to the main exhaust line; placing a hydrogen selective catalytic reduction unit in line on the main exhaust line, such that the hydrogen selective unit receives the exhaust and the gas mixture; and; using the hydrogen selective catalytic reduction unit to convert the NOemissions into nitrogen. 13. The method of claim 12, wherein the partial oxidation unit is a non-stoichiometric burner. 14. The method of claim 12, wherein the partial oxidation unit is a catalyst. 15. The method of claim 12, wherein the partial oxidation unit is a nickel-based catalyst. 16. The method of claim 12, wherein the partial oxidation unit is a rhodium-based catalyst. 17. The method of claim 12, wherein the partial oxidation unit is a combination of a non-stoichiometric burner and a catalyst. 18. The method of claim 12, wherein the hydrogen selective catalytic reduction unit is ruthenium-based. 19. The method of claim 12, wherein the hydrogen selective catalytic reduction unit is platinum-based. 20. The method of claim 12, further comprising the step of using a water gas shift catalyst to receive the gas mixture f rom the partial oxidation unit and to generate additional hydrogen in the gas mixture. 21. A method of treating the NOemissions from a diesel engine having a main fuel line that carries diesel fuel to the engine and a main exhaust line that carries exhaust from the engine, the method comprising the steps of:receiving a portion of diesel fuel from the main fuel line into a partial oxidation unit; receiving a portion of the exhaust from the main exhaust line into the partial oxidation unit; using the partial oxidation unit to partially oxidize the portion of diesel fuel into a gas mixture containing hydrogen; delivering the gas mixture to the main exhaust line; placing a hydrogen selective catalytic reduction unit in line on the main exhaust line, such that the hydrogen selective unit receives the exhaust and the gas mixture; and using the hydrogen selective catalytic reduction unit to convert the NOemissions into nitrogen. 22. The method of claim 21, wherein the partial oxidation unit is a non-stoichiometric burner. 23. The method of claim 21, wherein the partial oxidation unit is a catalyst. 24. The method of claim 21, wherein the partial oxidation unit is a nickel-based catalyst. 25. The method of claim 21, wherein the partial oxidation unit is a rhodium-based catalyst. 26. The method of claim 21, wherein the partial oxidation unit is a combination of a non-stoichiometric burner and a catalyst. 27. The method of claim 21, wherein the hydrogen selective catalytic reduction unit is ruthenium-based. 28. The method of claim 21, wherein the hydrogen selective catalytic reduction unit is platinum-based. 29. The method of claim 21, further comprising the step of using a water gas shift catalyst to receive the gas mixture from the partial oxidation unit and to generate additional hydrogen in the gas mixture.
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