WO2003033119A1 - Procede de reduction catalytique d'oxydes d'azote et catalyseur correspondant - Google Patents

Procede de reduction catalytique d'oxydes d'azote et catalyseur correspondant Download PDF

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Publication number
WO2003033119A1
WO2003033119A1 PCT/JP2002/010500 JP0210500W WO03033119A1 WO 2003033119 A1 WO2003033119 A1 WO 2003033119A1 JP 0210500 W JP0210500 W JP 0210500W WO 03033119 A1 WO03033119 A1 WO 03033119A1
Authority
WO
WIPO (PCT)
Prior art keywords
catalyst
catalyst component
nitrogen oxides
catalytic reduction
oxides
Prior art date
Application number
PCT/JP2002/010500
Other languages
English (en)
Japanese (ja)
Inventor
Tadao Nakatsuji
Original Assignee
Valtion Teknillinen Tutkimuskeskus
Isuzu Motors Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valtion Teknillinen Tutkimuskeskus, Isuzu Motors Limited filed Critical Valtion Teknillinen Tutkimuskeskus
Publication of WO2003033119A1 publication Critical patent/WO2003033119A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • B01D53/9422—Processes characterised by a specific catalyst for removing nitrogen oxides by NOx storage or reduction by cyclic switching between lean and rich exhaust gases (LNT, NSC, NSR)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56—Platinum group metals
    • B01J23/63—Platinum group metals with rare earths or actinides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/024—Multiple impregnation or coating
    • B01J37/0244—Coatings comprising several layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1021—Platinum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1023—Palladium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1025—Rhodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/206—Rare earth metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Catalysts (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

Procédé de réduction catalytique d'oxydes d'azote dans lequel un carburant est alimenté dans un état alterné périodiquement riche / pauvre et brûlé, et un gaz d'échappement généré est contacté avec une structure de catalyseur pour réduire par catalyse les oxydes d'azote dans le gaz d'échappement. Le procédé est caractérisé en ce que la structure de catalyseur comprend un substrat inerte, sur lequel sont formés: (A) une couche de composant de catalyseur de surface comportant un composant de catalyseur de surface tel que le minerai de cérium; (B) un catalyseur intermédiaire comportant un composant de catalyseur intermédiaire tel que le minerai de cérium et un deuxième composant de catalyseur intermédiaire, sélectionné parmi rhodium, palladium et leurs oxydes, etc.; et (C) une couche de catalyseur interne comportant un composant de catalyseur interne tel que le minerai de cérium et au moins un composant de catalyseur sélectionné parmi le platine, le rhodium, le palladium et leurs oxydes.
PCT/JP2002/010500 2001-10-15 2002-10-10 Procede de reduction catalytique d'oxydes d'azote et catalyseur correspondant WO2003033119A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001316344A JP3721112B2 (ja) 2001-10-15 2001-10-15 窒素酸化物を接触還元する方法とそのための触媒
JP2001-316344 2001-10-15

Publications (1)

Publication Number Publication Date
WO2003033119A1 true WO2003033119A1 (fr) 2003-04-24

Family

ID=19134370

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/010500 WO2003033119A1 (fr) 2001-10-15 2002-10-10 Procede de reduction catalytique d'oxydes d'azote et catalyseur correspondant

Country Status (2)

Country Link
JP (1) JP3721112B2 (fr)
WO (1) WO2003033119A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1911517A1 (fr) * 2005-08-01 2008-04-16 Cataler Corporation Catalyseur d'épuration de gaz d'échappement
EP2047904A4 (fr) * 2006-07-25 2009-09-02 Toyota Motor Co Ltd Catalyseur pour purification de gaz d'échappement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4513453B2 (ja) * 2004-08-02 2010-07-28 マツダ株式会社 排気ガス浄化用触媒

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01199646A (ja) * 1987-10-21 1989-08-11 Soc Fr Prod Catalyse (Procatalyse) 内燃機関の排気ガス処理用触媒の製造方法
JPH06262088A (ja) * 1993-03-11 1994-09-20 Nissan Motor Co Ltd 排気ガス浄化用触媒
WO1995035152A1 (fr) * 1994-06-17 1995-12-28 Engelhard Corporation Catalyseur composite en couches
JPH08141405A (ja) * 1994-11-18 1996-06-04 Mazda Motor Corp 内燃機関の排気ガス浄化用触媒

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01199646A (ja) * 1987-10-21 1989-08-11 Soc Fr Prod Catalyse (Procatalyse) 内燃機関の排気ガス処理用触媒の製造方法
JPH06262088A (ja) * 1993-03-11 1994-09-20 Nissan Motor Co Ltd 排気ガス浄化用触媒
WO1995035152A1 (fr) * 1994-06-17 1995-12-28 Engelhard Corporation Catalyseur composite en couches
JPH08141405A (ja) * 1994-11-18 1996-06-04 Mazda Motor Corp 内燃機関の排気ガス浄化用触媒

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1911517A1 (fr) * 2005-08-01 2008-04-16 Cataler Corporation Catalyseur d'épuration de gaz d'échappement
EP1911517A4 (fr) * 2005-08-01 2009-02-11 Cataler Corp Catalyseur d'épuration de gaz d'échappement
US7998896B2 (en) 2005-08-01 2011-08-16 Cataler Corporation Exhaust gas purifying catalyst
EP2047904A4 (fr) * 2006-07-25 2009-09-02 Toyota Motor Co Ltd Catalyseur pour purification de gaz d'échappement

Also Published As

Publication number Publication date
JP3721112B2 (ja) 2005-11-30
JP2003117353A (ja) 2003-04-22

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