WO2008156087A1 - 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
WO2008156087A1
WO2008156087A1 PCT/JP2008/061056 JP2008061056W WO2008156087A1 WO 2008156087 A1 WO2008156087 A1 WO 2008156087A1 JP 2008061056 W JP2008061056 W JP 2008061056W WO 2008156087 A1 WO2008156087 A1 WO 2008156087A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
catalyst layer
catalyst
purification
lying
Prior art date
Application number
PCT/JP2008/061056
Other languages
English (en)
French (fr)
Inventor
Yoshihide Segawa
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 WO2008156087A1 publication Critical patent/WO2008156087A1/ja

Links

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
    • B01D53/9445—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
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/19—Catalysts containing parts with different compositions
    • 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
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
    • 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
    • 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
    • B01J37/0242—Coating followed by impregnation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/90—Physical characteristics of catalysts
    • B01D2255/92—Dimensions
    • B01D2255/9205—Porosity
    • 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)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Combustion & Propulsion (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

排ガス浄化用触媒１は、排ガス流れ方向に延びる複数のセル通路４に区画する内壁２１を有するハニカム基材２と、内壁２１を被覆する触媒層３とからなる。排ガス浄化用触媒１における排ガス流れ方向Ｇの下流側の下流部１２の径方向断面の触媒層厚みに対する触媒層のマクロ空隙率の比率（φ２）は、下流部１２よりも上流側の上流部１１の径方向断面の触媒層厚みに対する触媒層のマクロ空隙率の比率（φ１）よりも大きい。これにより、触媒層を有効に利用して排ガスの浄化率を向上させることができる。    
PCT/JP2008/061056 2007-06-21 2008-06-17 排ガス浄化用触媒 WO2008156087A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-163917 2007-06-21
JP2007163917A JP2009000622A (ja) 2007-06-21 2007-06-21 排ガス浄化用触媒

Publications (1)

Publication Number Publication Date
WO2008156087A1 true WO2008156087A1 (ja) 2008-12-24

Family

ID=40156246

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/061056 WO2008156087A1 (ja) 2007-06-21 2008-06-17 排ガス浄化用触媒

Country Status (2)

Country Link
JP (1) JP2009000622A (ja)
WO (1) WO2008156087A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103796758A (zh) * 2011-08-25 2014-05-14 株式会社电装 催化剂载体及其制造方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9381510B2 (en) * 2013-09-11 2016-07-05 Mitsui Mining & Smelting Co., Ltd. Exhaust gas purifying catalyst comprising a catalyst layer comprising at least two inorganic porous particles
JP6571570B2 (ja) * 2016-03-18 2019-09-04 トヨタ自動車株式会社 自動車排ガス浄化用触媒

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0838913A (ja) * 1994-07-27 1996-02-13 Nippondenso Co Ltd 排気ガス浄化用触媒と排気ガス浄化システム
JP2001062294A (ja) * 1999-08-25 2001-03-13 Toyota Motor Corp 排気浄化用触媒
JP2003154223A (ja) * 2001-07-18 2003-05-27 Ibiden Co Ltd 触媒つきフィルタ、その製造方法及び排気ガス浄化システム
JP2005095713A (ja) * 2003-09-22 2005-04-14 Toyota Motor Corp 触媒担体及びその製造方法
JP2005177571A (ja) * 2003-12-17 2005-07-07 Nissan Motor Co Ltd Ｈｃトラップ触媒
JP2005177624A (ja) * 2003-12-19 2005-07-07 Nissan Motor Co Ltd 改質触媒
JP2005248726A (ja) * 2004-03-01 2005-09-15 Toyota Motor Corp 排ガス浄化用フィルタ触媒

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0838913A (ja) * 1994-07-27 1996-02-13 Nippondenso Co Ltd 排気ガス浄化用触媒と排気ガス浄化システム
JP2001062294A (ja) * 1999-08-25 2001-03-13 Toyota Motor Corp 排気浄化用触媒
JP2003154223A (ja) * 2001-07-18 2003-05-27 Ibiden Co Ltd 触媒つきフィルタ、その製造方法及び排気ガス浄化システム
JP2005095713A (ja) * 2003-09-22 2005-04-14 Toyota Motor Corp 触媒担体及びその製造方法
JP2005177571A (ja) * 2003-12-17 2005-07-07 Nissan Motor Co Ltd Ｈｃトラップ触媒
JP2005177624A (ja) * 2003-12-19 2005-07-07 Nissan Motor Co Ltd 改質触媒
JP2005248726A (ja) * 2004-03-01 2005-09-15 Toyota Motor Corp 排ガス浄化用フィルタ触媒

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103796758A (zh) * 2011-08-25 2014-05-14 株式会社电装 催化剂载体及其制造方法

Also Published As

Publication number Publication date
JP2009000622A (ja) 2009-01-08

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