WO2009001715A1 - 排ガス浄化用触媒 - Google Patents

排ガス浄化用触媒 Download PDF

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Publication number
WO2009001715A1
WO2009001715A1 PCT/JP2008/061050 JP2008061050W WO2009001715A1 WO 2009001715 A1 WO2009001715 A1 WO 2009001715A1 JP 2008061050 W JP2008061050 W JP 2008061050W WO 2009001715 A1 WO2009001715 A1 WO 2009001715A1
Authority
WO
WIPO (PCT)
Prior art keywords
catalyst
cerium
support
composite oxide
zirconium composite
Prior art date
Application number
PCT/JP2008/061050
Other languages
English (en)
French (fr)
Inventor
Akemi Satou
Yoshiteru Yazawa
Masamichi Kuwajima
Original Assignee
Toyota Jidosha Kabushiki Kaisha
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 Toyota Jidosha Kabushiki Kaisha filed Critical Toyota Jidosha Kabushiki Kaisha
Publication of WO2009001715A1 publication Critical patent/WO2009001715A1/ja

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2825—Ceramics
    • F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
    • 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
    • B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
    • B01D53/945—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific catalyst
    • 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
    • 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
    • B01J37/0248—Coatings comprising impregnated particles
    • 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
    • B01D2255/40—Mixed oxides
    • B01D2255/407—Zr-Ce mixed oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/90—Physical characteristics of catalysts
    • B01D2255/902—Multilayered catalyst
    • B01D2255/9022—Two layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
    • F01N2510/0684—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings having more than one coating layer, e.g. multi-layered coatings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

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

Abstract

　少なくともCe－Zr複合酸化物を含む担体にPdが担持された触媒粉末を含む下触媒コート層２と、ジルコニア及びCe－Zr複合酸化物の少なくとも一方からなる担体にRhが担持された触媒粉末を含む上触媒コート層３と、からなる二層構造の触媒とした。Ce－Zr複合酸化物にPdを担持することで、酸素吸放出能によってPdからより活性の高いPdOが生成し、Ptに準じた高い酸化活性が発現される。またジルコニア及びCe－Zr複合酸化物の少なくとも一方からなる担体は耐熱性に優れ、それに担持されたRhは粒成長が抑制される。
PCT/JP2008/061050 2007-06-22 2008-06-17 排ガス浄化用触媒 WO2009001715A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-165259 2007-06-22
JP2007165259A JP2009000648A (ja) 2007-06-22 2007-06-22 排ガス浄化用触媒

Publications (1)

Publication Number Publication Date
WO2009001715A1 true WO2009001715A1 (ja) 2008-12-31

Family

ID=40185533

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/061050 WO2009001715A1 (ja) 2007-06-22 2008-06-17 排ガス浄化用触媒

Country Status (2)

Country Link
JP (1) JP2009000648A (ja)
WO (1) WO2009001715A1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5556022B2 (ja) * 2009-02-16 2014-07-23 マツダ株式会社 排気ガス浄化用触媒
EP2412437B1 (en) 2009-03-25 2017-12-06 Honda Motor Co., Ltd. Exhaust gas purifying catalyst for saddle type vehicle
JP5903205B2 (ja) * 2010-01-04 2016-04-13 株式会社キャタラー 排ガス浄化用触媒
JP5458973B2 (ja) * 2010-03-09 2014-04-02 マツダ株式会社 排気ガス浄化用触媒
JP5376261B2 (ja) 2011-03-10 2013-12-25 トヨタ自動車株式会社 排ガス浄化用触媒
KR102068969B1 (ko) * 2012-06-06 2020-01-22 우미코레 아게 운트 코 카게 가솔린 미립자 필터의 업스트림에 사용하기 위한 시동 촉매

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0615040B2 (ja) * 1987-07-06 1994-03-02 株式会社豊田中央研究所 排気浄化用触媒
JPH09131530A (ja) * 1995-11-09 1997-05-20 Ict:Kk 内燃機関排ガス浄化用触媒
JPH10296085A (ja) * 1997-04-30 1998-11-10 Cataler Kogyo Kk 排ガス浄化用触媒
JP2001079403A (ja) * 1999-09-14 2001-03-27 Daihatsu Motor Co Ltd 排気ガス浄化用触媒
JP2003299967A (ja) * 2002-04-04 2003-10-21 Toyota Motor Corp 触媒担体構造体及び排気ガス浄化用触媒
JP2006205050A (ja) * 2005-01-27 2006-08-10 Toyota Motor Corp 排ガス浄化用触媒
JP2006326527A (ja) * 2005-05-27 2006-12-07 Cataler Corp 排ガス浄化用触媒
JP2007083125A (ja) * 2005-09-20 2007-04-05 Toyota Motor Corp 排ガス浄化用触媒

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0615040B2 (ja) * 1987-07-06 1994-03-02 株式会社豊田中央研究所 排気浄化用触媒
JPH09131530A (ja) * 1995-11-09 1997-05-20 Ict:Kk 内燃機関排ガス浄化用触媒
JPH10296085A (ja) * 1997-04-30 1998-11-10 Cataler Kogyo Kk 排ガス浄化用触媒
JP2001079403A (ja) * 1999-09-14 2001-03-27 Daihatsu Motor Co Ltd 排気ガス浄化用触媒
JP2003299967A (ja) * 2002-04-04 2003-10-21 Toyota Motor Corp 触媒担体構造体及び排気ガス浄化用触媒
JP2006205050A (ja) * 2005-01-27 2006-08-10 Toyota Motor Corp 排ガス浄化用触媒
JP2006326527A (ja) * 2005-05-27 2006-12-07 Cataler Corp 排ガス浄化用触媒
JP2007083125A (ja) * 2005-09-20 2007-04-05 Toyota Motor Corp 排ガス浄化用触媒

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Publication number Publication date
JP2009000648A (ja) 2009-01-08

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