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Zirconia and sulfate in NOx traps to improved trapping and sulfur tolerance 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • B01D-053/34
출원번호 US-0753753 (1996-11-29)
발명자 / 주소
  • Dobson Douglas A.
  • Hubbard Carolyn Parks
  • Watkins William Lewis Henderson
출원인 / 주소
  • Ford Global Technologies, Inc.
대리인 / 주소
    Melotik
인용정보 피인용 횟수 : 25  인용 특허 : 0

초록

The invention is a nitrogen oxide trap comprising a porous support loaded with 6-15 wt. % strontium oxide and thereon, a mixture of: 0.5-5 wt. % precious metal catalyst selected from platinum, palladium, rhodium or mixtures thereof loaded, 3.5-15 wt. % zirconium and 15-30 wt. % sulfate, where prefer

대표청구항

[ We claim:] [1.] A nitrogen oxide trap useful for trapping nitrogen oxide present in an exhaust gas stream generated during lean-burn operation of an internal combustion engine and releasing said absorbed nitrogen oxides when an exhaust gas's oxygen concentration is lowered, said trap comprising:a

이 특허를 인용한 특허 (25)

  1. Maunula, Teuvo, Adsorbent catalyst.
  2. Gordan James J. Bartley ; Magdi K. Khair, Apparatus and method for bypassing sulfur dioxide around an aftertreatment device in an exhaust gas aftertreatment system.
  3. Efstathiou, Angelos M.; Savva, Petros G.; Costa, Costas N., Catalyst containing platinum and palladium for the selective reduction of NOx with hydrogen (H2-SCR).
  4. Ohtsuka, Hirofumi; Tabata, Takeshi; Nakahira, Takatoshi; Masuda, Masataka; Hirano, Takenori, Catalyst for removing hydrocarbons from exhaust gas and method for clarification of exhaust gas.
  5. Ohtsuka, Hirofumi; Tabata, Takeshi; Nakahira, Takatoshi; Masuda, Masataka; Hirano, Takenori, Catalyst for removing hydrocarbons from exhaust gas and method for purification of exhaust gas.
  6. Ohtsuka,Hirofumi; Tabata,Takeshi; Nakahira,Takatoshi; Masuda,Masataka; Hirano,Takenori, Catalyst for removing hydrocarbons from exhaust gas and method for purification of exhaust gas.
  7. Sobolevskiy, Anatoly; Rossin, Joseph A.; Knapke, Michael J., Catalytic process for control of NOemissions using hydrogen.
  8. Umemoto Yoshichika,JPX ; Nakatani Toshio,JPX ; Ohuchi Kimio,JPX, Cerium- and zirconium-based mixed oxide, method of producing same and catalyst material for exhaust gas purification.
  9. Miyoshi, Seiji; Takami, Akihide; Kyougoku, Makoto; Yamada, Hiroshi; Okamoto, Kenji; Yamamoto, Kenichi; Kooda, Yuki, Device for purifying exhaust gas, method for purifying exhaust gas, catalyst for purifying exhaust gas, and method for manufacturing exhaust gas purifying catalyst.
  10. Beutel,Tilman Wolfram; Calabrese,John Lawrence, Emission control system for vehicles powered by diesel engines.
  11. Adelman, Brad; Andersson, Per G?sta Edvin, Exhaust emission control system and method for removal and storage of vehicle exhaust gas nitrogen oxides during cold operation.
  12. Gordon James J. Bartley ; Magdi K. Khair, Method for bypassing sulfur dioxide around an aftertreatment device in an exhaust gas aftertreatment system.
  13. Nagaoka, Daiji; Gabe, Masashi, Nitrogen oxide purification system.
  14. Sobolevskiy, Anatoly; Rossin, Joseph A.; Knapke, Michael J., Process of activation of a palladium catalyst system.
  15. Yuejin Li, SOX tolerant NOX trap catalysts and methods of making and using the same.
  16. Li,Yuejin, SOx tolerant NOx trap catalysts and methods of making and using the same.
  17. Wu, Joseph H-Z.; Dettling, Joseph C., SOx tolerant NOx trap catalysts and methods of making and using the same.
  18. Wu, Joseph H-Z.; Dettling, Joseph C., SOx tolerant NOx trap catalysts and methods of making and using the same.
  19. Sobolevskiy, Anatoly; Rossin, Joseph A.; Knapke, Michael J., Selective catalytic reduction system and process for treating NOx emissions using a palladium and rhodium or ruthenium catalyst.
  20. Sobolevskiy, Anatoly; Rossin, Joseph A.; Knapke, Michael J., Selective catalytic reduction system and process for treating NOx emissions using a zinc or titanium promoted palladium-zirconium catalyst.
  21. Sobolevskiy, Anatoly; Rossin, Joseph A., Selective catalytic reduction system and process using a pre-sulfated zirconia binder.
  22. Teague Bruce H. ; DeGroot Kenneth P. ; Larson Thomas A., Sensor output precision enhancement in an automotive control system.
  23. Weissman,Walter; El Malki,El Mekki, Sulfur oxide/nitrogen oxide trap system and method for the protection of nitrogen oxide storage reduction catalyst from sulfur poisoning.
  24. Hepburn Jeffrey Scott ; Watkins William Lewis Henderson, Sulfur tolerant NO.sub.x traps highly loaded with sodium or potassium.
  25. Chattha Mohinder S. ; Kudla Robert J., Treating diesel exhaust with a catalytic particulate mixture.
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