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Urea pyrolysis chamber and process for reducing lean-burn engine NOx emissions by selective catalytic reduction 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • B01D-047/08
  • B01D-053/34
  • C01B-021/08
  • B01J-008/00
  • F01N-003/00
출원번호 US-0378350 (1999-08-20)
발명자 / 주소
  • Peter-Hoblyn Jeremy D.,GBX
  • Balles Eric N.
  • Tarabulski Theodore J.
  • Hofmann John E.
  • Valentine James M.
출원인 / 주소
  • Clean Diesel Technologies, Inc.
대리인 / 주소
    Ware, Fressola, Van Der Sluys & Adolphson LLP
인용정보 피인용 횟수 : 64  인용 특허 : 12

초록 ▼

Urea is pyrolyzed in a chamber designed to facilitate gasification of the urea by pyrolysis with conversion of urea to ammonia and isocyanic acid (HNCO) with water vapor and carbon dioxide. The product gases are introduced into exhaust gases from a lean-burn engine, preferably upstream of a turbocha

대표청구항 ▼

[What is claimed is:] [1.]a pyrolysis chamber for pyrolizing urea fed as an aqueous solution including heated internal surfaces and having openings therein to permit discharge of gases generated by pyrolysis of urea and vaporization of water;means for passing the gases generated by pyrolysis into th

이 특허에 인용된 특허 (12)

  1. Hug Hans T. (Grabenwiese 87 CH-8484 Weisslingen CHX) Hartenstein Axel (Wolfzangenstrasse 42 CH-8413 Neftenbach CHX) Hug Michael (Hofweg 2 CH-9547 Heiterschen TG CHX), Cleaning exhaust gases from combustion installations.
    상세보기
  2. Bowers Wayne E. (Clearwater FL) Sprague Barry N. (West Haven CT), Diesel fuel additives and diesel fuels containing soluble platinum group metal compounds and use in diesel engines.
    상세보기
  3. Bowers Wayne E. (Clearwater FL) Sprague Barry N. (West Haven CT), Gasoline additives and gasoline containing soluble platinum group metal compounds and use in internal combustion engines.
    상세보기
  4. Epperly W. Robert (New Canaan CT) Sprague Barry N. (Bethlehem CT), Method for catalyzing fuel for powering internal combustion engines.
    상세보기
  5. Peter-Hoblyn Jeremy D. (Bodmin CT GB3) Valentine James M. (Fairfield CT) Epperly W. Robert (New Canaan CT) Sprague Barry N. (Bethlehem CT), Method for reducing pollution emissions from a diesel engine.
    상세보기
  6. Epperly W. Robert (New Canaan CT) Sprague Barry N. (Bethlehem CT) Kelso Danny T. (Houston TX) Bowers Wayne E. (North Vassalboro ME), Method for regenerating, replacing or treating the catalyst in a hydroprocessing reactor.
    상세보기
  7. Kato Akira (Hitachi JPX) Matsuda Shimpei (Hitachi JPX) Uno Shigeo (Hitachi JPX) Imahashi Jinichi (Hitachi JPX) Watanabe Yoshihisa (Inashiki JPX) Imanari Makoto (Inashiki JPX) Nakajima Fumito (Hitachi, Process for catalytically treating exhaust gas containing NOx in the presence of ammonia gas.
    상세보기
  8. Henke Werner (P.O. Box 51932 Oil Center Station Lafayette LA 70501), Process for efficiently removing oxides of nitrogen from exhaust gas.
    상세보기
  9. Burton Albert A. (Norwalk CT), Process for reducing the concentration of pollutants in an effluent.
    상세보기
  10. Mori ; Toshikatsu ; Takeuchi ; Masato ; Hitomi ; Otane ; Uno ; Shigeo ; I mahashi ; Jinichi ; Nakajima ; Fumito, Process for removing nitrogen oxides using ammonia as a reductant and sulfated metallic catalysts.
    상세보기
  11. Ginger Edward A. (Northbrook IL), Process for the catalytic reduction of nitrogen oxides in gaseous mixtures.
    상세보기
  12. Tarabulski Theodore J. ; Peter-Hoblyn Jeremy D.,GBX ; Valentine James M., Reducing NO.sub.x emissions from an engine by selective catalytic reduction utilizing solid reagents.
    상세보기

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  3. Hatfield, Randal L.; Golden, Stephen J.; Ngo, Johnny T., Base metal activated rhodium coatings for catalysts in three-way catalyst (TWC) applications.
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  4. Zapf, Friedrich; Pelz, Thorsten; Stegmann, Heico, Calibrated dosing unit, especially of an exhaust gas treatment unit.
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  5. Launois, Maxime; Nazarpoor, Zahra; Golden, Stephen J., Calibration strategies to improve spinel mixed metal oxides catalytic converters.
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  6. Phelps, Sr., Calvin E.; Erickson, Clayton A.; Jambhekar, Rajaram; Harold, John R., Conversion of urea to reactants for NO.
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  7. Schaller,Johannes; Brinz,Thomas; Ullmann,Ilona, Device for exhaust gas treatment of a combustion system.
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  8. Hodgson, Jan, Device for reducing a level of nitrogen oxides in an exhaust gas of an internal combustion engine.
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  9. Sprague, Barry; Beal, Steve, Diesel exhaust treatment systems and methods.
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  10. Makkee, Michiel; Kamasamudram, Krishna; Copan, Walter G., Diesel particulate control.
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  11. Hudson, Dannie B., Dual homogenization system and process for fuel oil.
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  12. Langer,Deborah A.; Bardasz,Ewa A.; Abraham,William D., Emulsified fuels and engine oil synergy.
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  13. Nazarpoor, Zahra; Golden, Stephen J., Enhanced catalytic activity at the stoichiometric condition of zero-PGM catalysts for TWC applications.
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  14. McKinley,Thomas L.; Zoran,Randolph G., Exhaust aftertreatment device with star-plugged turbulator.
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  15. Gundrum, Timothy Joseph, Exhaust aftertreatment supplying a reducing agent.
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  16. Wieland Mathes DE; Frank Witzel ; Steffen Schnapp DE, Exhaust emission control system for the exhaust gas of a diesel engine.
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  17. Zheng, Guanyu; Zhang, Yongyue; Popovich, Jeremy D.; Yetken, Dervis A.; Kotrba, Adam J., Exhaust gas additive/treatment system and mixer for use therein.
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  18. Sakimoto, Masatsugu; Yamada, Hiroshi; Ishida, Hiroaki, Exhaust gas after treatment system and method for operating an exhaust gas after treatment system for internal combustion engine.
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  19. Zapf, Friedrich; Pelz, Thorsten; Stegmann, Heico, Exhaust gas aftertreatment system and method.
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  20. Bui, Yung T.; Thirunavukarasu, Balamurugesh; Biswas, Subodh Chandra, Exhaust gas mixing system.
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  21. Barcin, Buelent, Exhaust gas subsequent treatment method and method therefor.
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  22. Zapf, Friedrich; Stegmann, Heico; Lannig, Andreas; Lang, Klaus; Schmidt, Christian; Branco, Alexandre, Exhaust-gas aftertreatment device.
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  23. Zapf, Friedrich; Stegmann, Heico; Lannig, Andreas; Lang, Klaus; Schmidt, Christian; Branco, Alexandre, Exhaust-gas aftertreatment device.
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  24. Hofmann, Lothar; Mathes, Wieland; Klumpp, Udo, Expanded grid static mixer.
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  25. Lothar Hofmann DE; Wieland Mathes DE; Udo Klumpp DE, Expanded grid static mixer.
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  26. Kouno, Susumu; Suzuki, Kenji; Takeshita, Kazuko; Iida, Kozo; Onishi, Toshiyuki; Hattori, Akira, Feedback control method in V-shaped characteristic system, and NH3 injection rate control method for NOx removal apparatus using the same.
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  27. Nazarpoor, Zahra, Firing (calcination) process and method related to metallic substrates coated with ZPGM catalyst.
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  28. Maisch, Dieter; Klotz, Stefan; Bleeck, Matthias, Freeze-resistant metering valve.
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  29. Maisch, Dieter; Klotz, Stefan; Bleeck, Matthias, Freeze-resistant metering valve.
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  30. Kaemingk, Nathan J.; Gerty, Michael, Injector control for a selective catalytic reduction system.
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  31. Kaemingk, Nathan J.; Gerty, Michael, Injector control for a selective catalytic reduction system.
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  32. Fischer,Stefan, Method and emission control system for catalytically reducing nitrogen oxides in the exhaust gas of a combustion system.
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  37. Xu, Lifeng; Watkins, William Lewis Henderson; Ruona, William Charles; Graham, George Wade; McCabe, Robert Walter, Multi-stage regeneration of particulate filter.
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  38. Liang, Cho Y.; Srinivasan, Syamaia; Jacobson, Evan E., NOx emission-control system using a virtual sensor.
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  39. Valentine, James M.; Broderick, Jeffrey Michael; Lindemann, Scott H.; Broderick, R. Gifford; Schindler, Edmund S., On demand generation of ammonia for small industrial and commercial boilers.
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  40. Nazarpoor, Zahra; Kitazumi, Sen; Ngo, Johnny T., Optimization of Zero-PGM washcoat and overcoat loadings on metallic substrate.
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  41. Cizeron,Joel M.; Dalla Betta,Ralph A., Pre-combustors for internal combustion engines and systems and methods therefor.
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  45. Floyd, Ryan A.; Grant, Eric; McAninch, Dan; Blumhardt, David; Lowry, John M.; Shovels, Michael L., Reagent tank normalizing system.
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  46. Davidson, Debbie; Engeham, Duncan; Uban, Piotr; Elsey, David; Liu, Z. Gerald; Pawson, Kenneth; Smith, Paul; Capel, Ken; Critchley, Andrew; Sarcona, David; Goss, James, Reductant decomposition system.
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  48. Zuberi, Bilal, Refractory exhaust filtering method and apparatus.
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  50. Branco, Alexandre; Stegmann, Heico; Zapf, Friedrich, SCR exhaust gas aftertreatment device.
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  51. Fuchs, Tobias; Lannig, Andreas; Rohrmueller, Ralf; Weidner, Sebastian; Zapf, Friedrich, SCR exhaust gas aftertreatment device.
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  52. Sun, William H.; Cummings, Jr., William E.; de Havilland, Piers; Carmignani, Paul G.; Boyle, John M., Selective catalytic reduction of NOenabled by sidestream urea decomposition.
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  53. Sun,William H.; Cummings, Jr.,William E.; de Havilland,Piers; Carmignani,Paul G.; Boyle,John M., Selective catalytic reduction of nox enabled by sidestream urea decomposition.
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  54. Nazarpoor, Zahra; Golden, Stephen J., Spinel compositions and applications thereof.
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  55. Kass,Michael Delos; Graves,Ronald Lee; Storey,John Morse Elliot; Lewis, Sr.,Samuel Arthur; Sluder,Charles Scott; Thomas,John Foster, Stripping ethanol from ethanol-blended fuels for use in NOSCR.
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  56. Nazarpoor, Zahra; Golden, Stephen J., Synergized PGM catalyst systems including platinum for TWC application.
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  57. Golden, Stephen J., Synergized PGM close-coupled catalysts for TWC applications.
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  58. Monro, Jr., Robert W., System and method for reducing nitrogen oxides in combustion exhaust streams.
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  59. Broderick, Jeffrey Michael; O'Leary, Kathryn V.; Broderick, R. Gifford; Dale, John N.; Valentine, James M., System and method for urea decomposition to ammonia in a side stream for selective catalytic reduction.
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  60. Johannessen, Tue; Schmidt, Henning, System for storing ammonia in and releasing ammonia from a storage material and method for storing and releasing ammonia.
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  61. Nazarpoor, Zahra; Abken, Anke Elizabeth; Golden, Stephen J., Thermal stability of copper-manganese spinel as Zero PGM catalyst for TWC application.
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  62. Hatfield, Randal L.; Lee, Edward J.; Ngo, Johnny T.; Golden, Stephen J., Three-way catalyst systems including Fe-activated Rh and Ba-Pd material compositions.
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  63. Broderick, R. Gifford; Broderick, Jeffrey Michael; O'Leary, Kathryn V.; Lindemann, Scott H.; Valentine, James M., Urea decomposition and improved SCR NOx reduction on industrial and small utility boilers.
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  64. Nazarpoor, Zahra; Golden, Stephen J., ZPGM Diesel Oxidation Catalysts and methods of making and using same.
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