ZA908658B - Staged three-way conversion catalyst and method for using the same - Google Patents

Staged three-way conversion catalyst and method for using the same

Info

Publication number
ZA908658B
ZA908658B ZA908658A ZA908658A ZA908658B ZA 908658 B ZA908658 B ZA 908658B ZA 908658 A ZA908658 A ZA 908658A ZA 908658 A ZA908658 A ZA 908658A ZA 908658 B ZA908658 B ZA 908658B
Authority
ZA
South Africa
Prior art keywords
staged
same
conversion catalyst
way conversion
way
Prior art date
Application number
ZA908658A
Other languages
English (en)
Inventor
Wayne M Rudy
M Rudy Wayne
Original Assignee
Engelhard Corp
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 Engelhard Corp filed Critical Engelhard Corp
Publication of ZA908658B publication Critical patent/ZA908658B/xx

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
    • 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
    • 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
    • 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
    • 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
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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)
  • 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)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
ZA908658A 1989-11-08 1990-10-29 Staged three-way conversion catalyst and method for using the same ZA908658B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/433,890 US5010051A (en) 1989-11-08 1989-11-08 Staged three-way conversion catalyst and method of using the same

Publications (1)

Publication Number Publication Date
ZA908658B true ZA908658B (en) 1992-04-29

Family

ID=23721950

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA908658A ZA908658B (en) 1989-11-08 1990-10-29 Staged three-way conversion catalyst and method for using the same

Country Status (6)

Country Link
US (2) US5010051A (xx)
EP (1) EP0427494A3 (xx)
JP (1) JPH03169346A (xx)
KR (1) KR100192190B1 (xx)
CA (1) CA2027329A1 (xx)
ZA (1) ZA908658B (xx)

Families Citing this family (86)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5057483A (en) * 1990-02-22 1991-10-15 Engelhard Corporation Catalyst composition containing segregated platinum and rhodium components
KR100201748B1 (ko) * 1990-05-28 1999-06-15 사또 다께오 배기가스로부터 질소산화물을 제거하는 방법
CA2046951A1 (en) * 1990-07-19 1992-01-20 Akinori Eshita Catalyst for purifying exhaust gas and method of using same
US5248251A (en) * 1990-11-26 1993-09-28 Catalytica, Inc. Graded palladium-containing partial combustion catalyst and a process for using it
US5258349A (en) * 1990-11-26 1993-11-02 Catalytica, Inc. Graded palladium-containing partial combustion catalyst
EP0614398B1 (en) * 1991-11-26 2000-03-08 Engelhard Corporation Oxidation catalyst and method of use
US5376610A (en) * 1992-04-15 1994-12-27 Nissan Motor Co., Ltd. Catalyst for exhaust gas purification and method for exhaust gas purification
US5285640A (en) * 1992-07-21 1994-02-15 Olivo John R Integrated post-engine emissions heater, catalytic converter and muffler
JPH0639280A (ja) * 1992-07-24 1994-02-15 Nissan Motor Co Ltd アルデヒド浄化用触媒
JP3285614B2 (ja) * 1992-07-30 2002-05-27 日本碍子株式会社 排ガス浄化用触媒及びその製造方法
US6171556B1 (en) 1992-11-12 2001-01-09 Engelhard Corporation Method and apparatus for treating an engine exhaust gas stream
US6087295A (en) * 1992-12-14 2000-07-11 Asec Manufacturing Reduction of NOx in the exhaust gases from internal combustion engines containing excess oxygen
US5894068A (en) * 1992-12-14 1999-04-13 Kharas; Karl C. C. Reduction of NOx in the exhaust gases from internal combustion engines containing excess oxygen
EP0705134B1 (en) * 1993-06-25 1999-04-14 Engelhard Corporation Layered catalyst composite
EP0721368A1 (en) * 1993-10-01 1996-07-17 ASEC Manufacturing Company NOBLE METAL CATALYSTS FOR THE REDUCTION OF NO x? IN THE EXHAUST GASES FROM INTERNAL COMBUSTION ENGINES CONTAINING EXCESS OXYGEN
AU1731195A (en) * 1994-01-27 1995-08-15 Engelhard Corporation Process for recovering catalyst supports
DE4406648C1 (de) * 1994-03-01 1995-08-10 Daimler Benz Ag Verfahren und Vorrichtung zur Reinigung von Abgasen aus Verbrennungsmotoren
US5721188A (en) * 1995-01-17 1998-02-24 Engelhard Corporation Thermal spray method for adhering a catalytic material to a metallic substrate
US6818254B1 (en) * 1995-01-20 2004-11-16 Engelhard Corporation Stable slurries of catalytically active materials
US20020018742A1 (en) * 1995-01-20 2002-02-14 Engelhard Corporation Method and apparatus for treating the atmosphere
US6214303B1 (en) 1995-01-20 2001-04-10 Engelhard Corporation Method and apparatus for treating the atmosphere
US6200542B1 (en) 1995-01-20 2001-03-13 Engelhard Corporation Method and apparatus for treating the atmosphere
US6428754B1 (en) * 1995-02-01 2002-08-06 Univ Notre Dame Du Lac Method and Apparatus for treating exhaust gases
US6326329B1 (en) 1996-02-21 2001-12-04 Asec Manufacturing Highly dispersed substantially uniform mixed-metal-oxide composite supports for exhaust conversion catalysts
US6087298A (en) * 1996-05-14 2000-07-11 Engelhard Corporation Exhaust gas treatment system
GB9615123D0 (en) 1996-07-18 1996-09-04 Johnson Matthey Plc Three-way conversion catalysts and methods for the preparation therof
US6110861A (en) * 1997-06-02 2000-08-29 The University Of Chicago Partial oxidation catalyst
US6156283A (en) * 1998-03-23 2000-12-05 Engelhard Corporation Hydrophobic catalytic materials and method of forming the same
GB9806199D0 (en) * 1998-03-24 1998-05-20 Johnson Matthey Plc Catalytic generation of hydrogen
US6391822B1 (en) * 2000-02-09 2002-05-21 Delphi Technologies, Inc. Dual NOx adsorber catalyst system
US6860100B1 (en) 2000-03-17 2005-03-01 Ford Global Technologies, Llc Degradation detection method for an engine having a NOx sensor
US6594989B1 (en) * 2000-03-17 2003-07-22 Ford Global Technologies, Llc Method and apparatus for enhancing fuel economy of a lean burn internal combustion engine
US6360530B1 (en) 2000-03-17 2002-03-26 Ford Global Technologies, Inc. Method and apparatus for measuring lean-burn engine emissions
US6499293B1 (en) * 2000-03-17 2002-12-31 Ford Global Technologies, Inc. Method and system for reducing NOx tailpipe emissions of a lean-burn internal combustion engine
US6487850B1 (en) * 2000-03-17 2002-12-03 Ford Global Technologies, Inc. Method for improved engine control
GB0013609D0 (en) * 2000-06-06 2000-07-26 Johnson Matthey Plc Emission control
EP1181970B1 (de) 2000-08-16 2004-02-04 Umicore AG & Co. KG Abgasreinigungskatalysator für motornahen Einsatz und Verfahren zu seiner Herstellung
GB0021118D0 (en) * 2000-08-29 2000-10-11 Johnson Matthey Plc Exhaust system for lean-burn engines
US6691507B1 (en) 2000-10-16 2004-02-17 Ford Global Technologies, Llc Closed-loop temperature control for an emission control device
JP2002173370A (ja) * 2000-12-01 2002-06-21 Toyota Central Res & Dev Lab Inc チタニア系多孔体及び触媒
US6453666B1 (en) 2001-06-19 2002-09-24 Ford Global Technologies, Inc. Method and system for reducing vehicle tailpipe emissions when operating lean
US6604504B2 (en) 2001-06-19 2003-08-12 Ford Global Technologies, Llc Method and system for transitioning between lean and stoichiometric operation of a lean-burn engine
US6691020B2 (en) 2001-06-19 2004-02-10 Ford Global Technologies, Llc Method and system for optimizing purge of exhaust gas constituent stored in an emission control device
US6463733B1 (en) 2001-06-19 2002-10-15 Ford Global Technologies, Inc. Method and system for optimizing open-loop fill and purge times for an emission control device
US6694244B2 (en) 2001-06-19 2004-02-17 Ford Global Technologies, Llc Method for quantifying oxygen stored in a vehicle emission control device
US6650991B2 (en) 2001-06-19 2003-11-18 Ford Global Technologies, Llc Closed-loop method and system for purging a vehicle emission control
US6502387B1 (en) 2001-06-19 2003-01-07 Ford Global Technologies, Inc. Method and system for controlling storage and release of exhaust gas constituents in an emission control device
US6546718B2 (en) 2001-06-19 2003-04-15 Ford Global Technologies, Inc. Method and system for reducing vehicle emissions using a sensor downstream of an emission control device
US6615577B2 (en) 2001-06-19 2003-09-09 Ford Global Technologies, Llc Method and system for controlling a regeneration cycle of an emission control device
US6487853B1 (en) 2001-06-19 2002-12-03 Ford Global Technologies. Inc. Method and system for reducing lean-burn vehicle emissions using a downstream reductant sensor
US6553754B2 (en) 2001-06-19 2003-04-29 Ford Global Technologies, Inc. Method and system for controlling an emission control device based on depletion of device storage capacity
US6490860B1 (en) 2001-06-19 2002-12-10 Ford Global Technologies, Inc. Open-loop method and system for controlling the storage and release cycles of an emission control device
US6539706B2 (en) 2001-06-19 2003-04-01 Ford Global Technologies, Inc. Method and system for preconditioning an emission control device for operation about stoichiometry
US6467259B1 (en) 2001-06-19 2002-10-22 Ford Global Technologies, Inc. Method and system for operating dual-exhaust engine
US7276212B2 (en) 2001-10-01 2007-10-02 Engelhard Corporation Exhaust articles for internal combustion engines
US20040001781A1 (en) * 2002-06-27 2004-01-01 Engelhard Corporation Multi-zone catalytic converter
US7329629B2 (en) * 2002-10-24 2008-02-12 Ford Global Technologies, Llc Catalyst system for lean burn engines
US20040171900A1 (en) * 2003-02-28 2004-09-02 Conocophillips Company Method and device for reactions start-up
US20050089464A1 (en) * 2003-10-22 2005-04-28 General Electric Company Production Of Syngas For Fuel Cells Using Multiple Catalyst Configuration
DE102004002477A1 (de) * 2004-01-16 2005-08-11 Viessmann Werke Gmbh & Co Kg Vorrichtung zur Erzeugung von Wasserstoff
JP4503304B2 (ja) 2004-01-29 2010-07-14 株式会社キャタラー 排ガス浄化用触媒
US7374729B2 (en) * 2004-03-30 2008-05-20 Basf Catalysts Llc Exhaust gas treatment catalyst
JP2006075724A (ja) * 2004-09-09 2006-03-23 Toyota Motor Corp 排ガス浄化用触媒
US7601671B2 (en) * 2004-10-28 2009-10-13 Umicore Ag & Co. Kg Drying method for exhaust gas catalyst
US7514387B2 (en) * 2005-02-15 2009-04-07 Umicore Ag & Co. Kg Reformer and method of making the same
JP4778724B2 (ja) * 2005-05-02 2011-09-21 株式会社キャタラー 硫化水素発生抑制触媒
KR100667028B1 (ko) * 2005-10-04 2007-01-10 희성엥겔하드주식회사 환원제 무주입 ｓｃｒ 촉매컨버터
JP4835193B2 (ja) * 2006-02-20 2011-12-14 マツダ株式会社 ディーゼルパティキュレートフィルタ
JP4935219B2 (ja) * 2006-07-20 2012-05-23 トヨタ自動車株式会社 排ガス浄化用触媒
EP1970118A1 (en) * 2007-03-14 2008-09-17 Ford Global Technologies, LLC Oxidation catalyst, method of making such catalyst and IC engine using such catalyst
US8507401B1 (en) 2007-10-15 2013-08-13 SDCmaterials, Inc. Method and system for forming plug and play metal catalysts
US8038954B2 (en) * 2008-02-14 2011-10-18 Basf Corporation CSF with low platinum/palladium ratios
EP2112339A1 (de) * 2008-04-24 2009-10-28 Umicore AG & Co. KG Verfahren und Vorrichtung zur Reinigung von Abgasen eines Verbrennungsmotors
WO2010077843A2 (en) * 2008-12-29 2010-07-08 Basf Catalysts Llc Oxidation catalyst with low co and hc light-off and systems and methods
US9440192B2 (en) 2009-01-16 2016-09-13 Basf Corporation Diesel oxidation catalyst and use thereof in diesel and advanced combustion diesel engine systems
US8329607B2 (en) * 2009-01-16 2012-12-11 Basf Corporation Layered diesel oxidation catalyst composites
US8741239B2 (en) * 2009-02-25 2014-06-03 General Electric Company Method and apparatus for operation of CO/VOC oxidation catalyst to reduce NO2 formation for gas turbine
US8246923B2 (en) * 2009-05-18 2012-08-21 Umicore Ag & Co. Kg High Pd content diesel oxidation catalysts with improved hydrothermal durability
US8557203B2 (en) * 2009-11-03 2013-10-15 Umicore Ag & Co. Kg Architectural diesel oxidation catalyst for enhanced NO2 generator
US9120056B2 (en) 2010-02-16 2015-09-01 Ford Global Technologies, Llc Catalyst assembly for treating engine exhaust
US20120102951A1 (en) * 2010-10-29 2012-05-03 Gilbert Otto Kraemer Apparatus for reducing emissions and method of assembly
DE102013210270A1 (de) * 2013-06-03 2014-12-04 Umicore Ag & Co. Kg Dreiwegkatalysator
GB2518418A (en) * 2013-09-20 2015-03-25 Johnson Matthey Plc Electrically heated catalyst for a compression ignition engine
CN109414690A (zh) * 2016-07-14 2019-03-01 揖斐电株式会社 蜂窝结构体和该蜂窝结构体的制造方法
CN109876793B (zh) * 2019-03-17 2021-12-21 中自环保科技股份有限公司 一种具有高co净化能力的三效催化剂制备方法及其催化剂
CN109876807B (zh) * 2019-03-17 2021-12-21 中自环保科技股份有限公司 一种具有高NOx净化能力的三效催化剂制备方法及其催化剂

Family Cites Families (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE497441A (xx) * 1949-08-09
US3086839A (en) * 1960-03-30 1963-04-23 Universal Oil Prod Co Method for multiple zone treating of waste gas streams
US3375059A (en) * 1964-07-01 1968-03-26 Universal Oil Prod Co Oxidation of waste gases using plural catalysts in serial zones
US3397034A (en) * 1966-01-19 1968-08-13 Union Oil Co Method and apparatus for treating exhaust gases
BE756150A (fr) * 1969-09-16 1971-02-15 Johnson Matthey & Cy Ltd Perfectionnements aux reactions catalytiques
FR2072561A5 (en) * 1969-11-28 1971-09-24 Standard Oil Co Exhaust gas treating catalyst - having a carbon support and a metal or metal compound
US3656915A (en) * 1970-04-30 1972-04-18 Chemical Construction Corp Catalytic exhaust gas treatment apparatus
GB1390182A (en) * 1971-03-16 1975-04-09 Johnson Matthey Co Ltd Catalysis
GB1384248A (en) * 1971-05-07 1975-02-19 Ici Ltd Catalytic process
US3741725A (en) * 1971-08-12 1973-06-26 J Graham Catalytic control of auto exhaust emissions
US3825654A (en) * 1972-04-21 1974-07-23 Gulf Research Development Co Process for reducing the content of nitrogen oxides in the exhaust gases from internal combustion engines
US3896616A (en) * 1972-04-21 1975-07-29 Engelhard Min & Chem Process and apparatus
US3993572A (en) * 1972-08-04 1976-11-23 Engelhard Minerals & Chemicals Corporation Rare earth containing catalyst composition
US4552733A (en) * 1975-08-27 1985-11-12 Engelhard Corporation Polyfunctional catalysts and method of use
MX4509E (es) * 1975-08-27 1982-06-02 Engelhard Min & Chem Composicion catalitica mejorada para oxidar en forma simultanea hidrocarburos gascosos y monoxido de carbono y reducir oxidos de nitrogeno
US4091072A (en) * 1976-06-19 1978-05-23 Union Oil Company Of California Exhaust gas conversion process and catalyst
US4071600A (en) * 1976-12-06 1978-01-31 General Motors Corporation Process for improved 3-way emission control
US4171288A (en) * 1977-09-23 1979-10-16 Engelhard Minerals & Chemicals Corporation Catalyst compositions and the method of manufacturing them
US4701312A (en) * 1982-09-29 1987-10-20 Kice Warren B Fluidized bed catalytic converter
US4863707A (en) * 1982-09-30 1989-09-05 Engelhard Corporation Method of ammonia production
US4483691A (en) * 1982-09-30 1984-11-20 Engelhard Corporation Production of synthetic natural gas from coal gasification liquid by-products
US4448756A (en) * 1983-01-28 1984-05-15 Ford Motor Company Process for treatment of exhaust gases
US4757045A (en) * 1983-02-14 1988-07-12 Engelhard Corporation Catalysts with support coatings having increased macroporosity and method for producing the catalysts
JPS60110334A (ja) * 1983-11-21 1985-06-15 Nissan Motor Co Ltd 排ガス浄化用触媒の製造方法
DE3407172C2 (de) * 1984-02-28 1986-09-04 Degussa Ag, 6000 Frankfurt Einrichtung zur Reinigung der Abgase von Dieselmotoren
US4675308A (en) * 1984-06-14 1987-06-23 Engelhard Corporation Three-way catalyst for lean operating engines
US4678770A (en) * 1985-01-31 1987-07-07 Engelhard Corporation Three-way catalyst for lean exhaust systems
CA1247074A (en) * 1985-01-31 1988-12-20 Chung-Zong Wan Three-way catalysts of improved efficiency
JPS62262745A (ja) * 1986-05-09 1987-11-14 Cataler Kogyo Kk 排ガス浄化用触媒担体
US4727052A (en) * 1986-06-27 1988-02-23 Engelhard Corporation Catalyst compositions and methods of making the same
US4714694A (en) * 1986-06-30 1987-12-22 Engelhard Corporation Aluminum-stabilized ceria catalyst compositions, and methods of making the same
JPS6388040A (ja) * 1986-09-30 1988-04-19 Nippon Engeruharudo Kk 車輌用排気ガス浄化用触媒及びその製造方法
US4849399A (en) * 1987-04-16 1989-07-18 Allied-Signal Inc. Catalyst for the reduction of the ignition temperature of diesel soot
FR2622126B1 (fr) * 1987-10-21 1991-06-14 Procatalyse Ste Fse Produits C Catalyseur pour le traitement des gaz d'echappement des moteurs a combustion interne et procede de fabrication de ce catalyseur

Also Published As

Publication number Publication date
US5010051A (en) 1991-04-23
EP0427494A3 (en) 1991-08-14
CA2027329A1 (en) 1991-05-09
EP0427494A2 (en) 1991-05-15
US5531972A (en) 1996-07-02
JPH03169346A (ja) 1991-07-23
KR910009331A (ko) 1991-06-28
KR100192190B1 (ko) 1999-06-15

Similar Documents

Publication Publication Date Title
EP0427494A3 (en) Staged three-way conversion catalyst and method for using the same
AU625781B2 (en) Isomerization catalyst and method for the use thereof
KR0183499B1 (en) Aldehyde-telechelic polyisobutylenes catalytic method for preparing the same with high conversion and selectivity
AU2771889A (en) Catalytic converter
AU3869389A (en) Catalyst
GB8715814D0 (en) Catalyst
AU6825490A (en) Power converter system
EP0408253A3 (en) Converters and the control thereof
GB9004436D0 (en) Catalytic cell
EP0353508A3 (en) Ecl-mos converter
GB8929239D0 (en) Certification system
AU7407287A (en) Catalyst
EP0432670A3 (en) Converter and discharge-lamp operating apparatus using the converter
GB8618325D0 (en) Catalyst
GB8702450D0 (en) Catalytic method
GB2239406B (en) Catalytic gas conversion method
GB8602654D0 (en) Catalyst
GB8901514D0 (en) Perovskite-type catalyst
IL92033A0 (en) Catalyst and method for the preparation thereof
GB8605807D0 (en) Catalyst
EP0419942A3 (en) Frequency-digital converter
GB2204893B (en) Structural unit and method for the manufacture thereof
AU7449087A (en) Rail conversion means
GB8605808D0 (en) Catalyst
GB2197597B (en) Catalyst bodies