KR960037116A - 배기가스 정화용 촉매 - Google Patents

배기가스 정화용 촉매 Download PDF

Info

Publication number
KR960037116A
KR960037116A KR1019960013320A KR19960013320A KR960037116A KR 960037116 A KR960037116 A KR 960037116A KR 1019960013320 A KR1019960013320 A KR 1019960013320A KR 19960013320 A KR19960013320 A KR 19960013320A KR 960037116 A KR960037116 A KR 960037116A
Authority
KR
South Korea
Prior art keywords
layer
catalyst
exhaust gas
purification
supported
Prior art date
Application number
KR1019960013320A
Other languages
English (en)
Other versions
KR100388393B1 (ko
Inventor
아키히데 다카미
히데하루 이와쿠니
마코토 교고쿠
히로시 무라카미
Original Assignee
와다 요시히로
마츠다 가부시키가이샤
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 와다 요시히로, 마츠다 가부시키가이샤 filed Critical 와다 요시히로
Publication of KR960037116A publication Critical patent/KR960037116A/ko
Application granted granted Critical
Publication of KR100388393B1 publication Critical patent/KR100388393B1/ko

Links

Classifications

    • 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
    • B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • 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
    • B01J23/58—Platinum group metals with alkali- or alkaline earth metals
    • 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
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0835—Hydrocarbons
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842—Nitrogen 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/12—Combinations of different methods of purification absorption or adsorption, and catalytic conversion
    • 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
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • 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)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (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)
  • Exhaust Gas After Treatment (AREA)

Abstract

본 발명은 NOX정화용 촉매의 저온활성 향상을 도모하면서 그 내열성을 높이는 것으로, 상이한 2개의 촉매증(3)(4)을 담체(2)에 적층하여 담지하고 있다. 외측의 1층(3)은 제올라이트에 Pt와 Rh가 담지되어 이루어진 촉매층에 의해 형성하고, 내측의 제2층(4)은 알루미나에 Pd가 담지되어 이루어진 촉매층에 의해 형성한다.

Description

배기가스 정화용 촉매
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에 의한 실시예의 촉매구조를 도시한 단면도.

Claims (9)

  1. 배기가스를 정화하기 위한 촉매층이 담체에 담지되어 있는 배기가스 정화용 촉매에 있어서, 상기 촉매층이 Pt와 Rh가 담지된 결정성 금속함유 실리케이트를 함유하는 제1층과, Pd를 함유한 제2층을 구비하고, 상기 제1층이 외측에 배치되고, 상기 제2층이 내측에 배치되어 있는 것을 특징으로 하는 배기가스 정화용 촉매.
  2. 제1항에 있어서, 상기 제1층이 제2층위에 직접 중첩되어 있는 것을 특징으로 하는 배기가스 정화용 촉매.
  3. 제1항 또는 제2항에 있어서, 상기 제2층의 Pd가 알루미나에 담지되어 있는 것을 특징으로 하는 배기가스 정화용 촉매.
  4. 제1항 또는 제2항에 있어서, 상기 제2층의 Pd가 결정성 금속함유 실리케이트에 담지되어 있는 것을 특징으로 하는 배기가스 정화용 촉매.
  5. 제1항 또는 제2항에 있어서, 상기 제1층 또는 제2층 중 적어도 한쪽이 세륨산화물을 함유한 것을 특징으로 하는 배기가스 정화용 촉매.
  6. 제1항 내지 제5항의 어느 한 항에 있어서, 상기 촉매층의 전체에 점하는 제1층의 중량비율이 8/40~34/40인 것을 특징으로 하는 배기가스 정화용 촉매.
  7. 제1항 또는 제2항에 있어서, 상기 제1층의 Rh 중량이 Pt중량의 1/90~2/5인 것을 특징으로 하는 배기가스 정화용 촉매.
  8. 제1항 또는 제2항에 있어서, 상기 제1층에 알루미나이 첨가되어 있는 것을 특징으로 하는 배기가스 정화용 촉매.
  9. 제1항 내지 제8항의 어느 한 항에 있어서, 상기 배기가스 정화용 촉매가 이론공연비보다 산소과잉의 공연비에 이해 운전되는 운전영역을 가진 엔진의 배기가스를 정화하는 것을 특징으로 하는 배기가스 정화용 촉매.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019960013320A 1995-04-28 1996-04-27 배기가스정화용촉매 KR100388393B1 (ko)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP10449895 1995-04-28
JP95-104498 1995-04-28
JP96-112911 1996-03-29
JP8112911A JPH0910594A (ja) 1995-04-28 1996-03-29 排気ガス浄化用触媒

Publications (2)

Publication Number Publication Date
KR960037116A true KR960037116A (ko) 1996-11-19
KR100388393B1 KR100388393B1 (ko) 2003-10-04

Family

ID=26444955

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019960013320A KR100388393B1 (ko) 1995-04-28 1996-04-27 배기가스정화용촉매

Country Status (4)

Country Link
US (1) US5795840A (ko)
JP (1) JPH0910594A (ko)
KR (1) KR100388393B1 (ko)
DE (1) DE19617124B4 (ko)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR980000574A (ko) * 1996-06-17 1998-03-30 김영귀 질소산화물 정화용 촉매제조방법
KR100801880B1 (ko) * 2006-07-25 2008-02-12 오덱(주) 가솔린 자동차용 촉매

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3956437B2 (ja) * 1996-09-26 2007-08-08 マツダ株式会社 排気ガス浄化用触媒
EP0842700B1 (de) * 1996-11-11 1999-03-24 Degussa Ag Abgasreinigungskatalysator mit Verbessertem Umsatz für Kohlenwasserstoffe
FR2767722B1 (fr) * 1997-08-29 1999-12-31 Inst Francais Du Petrole Nouveau catalyseur utilisable dans les reactions de transformation de composes organiques
JP3924946B2 (ja) * 1997-09-25 2007-06-06 マツダ株式会社 排気ガス浄化材
JP3772583B2 (ja) * 1998-06-01 2006-05-10 日産自動車株式会社 内燃機関の排気浄化装置
JP3370957B2 (ja) * 1998-09-18 2003-01-27 トヨタ自動車株式会社 内燃機関の排気浄化装置
DE19854794A1 (de) * 1998-11-27 2000-05-31 Degussa Katalysator für die Reinigung der Abgase eines Dieselmotors
US20020048542A1 (en) * 1999-04-02 2002-04-25 Michel Deeba Catalytic trap and methods of making and using the same
US6497848B1 (en) 1999-04-02 2002-12-24 Engelhard Corporation Catalytic trap with potassium component and method of using the same
US6261989B1 (en) * 1999-05-19 2001-07-17 Daihatsu Motor Co., Ltd. Catalytic converter for cleaning exhaust gas
EP1066874B1 (en) 1999-07-09 2009-09-23 Nissan Motor Company, Limited Exhaust gas purifying catalyst and method of producing same
BR0013516A (pt) * 1999-08-23 2003-07-15 Engelhard Corp Coletor catalìco para converter nox em uma corrente de gás de exautão; coletor catalìtico eficaz para conversão de nox em uma corrente de gás de exautão; e método de tratamento d euma corrente de gás de exautão contendo nox para reduzir o teor de nox da corrente
JP3777589B2 (ja) * 2000-02-28 2006-05-24 日産自動車株式会社 排気ガス浄化用触媒および排気ガス浄化用触媒の製造方法
JP4703818B2 (ja) * 2000-06-20 2011-06-15 株式会社アイシーティー 排気ガス浄化用触媒および排気ガス浄化方法
JP4236543B2 (ja) * 2003-09-08 2009-03-11 本田技研工業株式会社 窒素酸化物の接触分解のための触媒と方法
JP4740217B2 (ja) * 2003-11-11 2011-08-03 本田技研工業株式会社 窒素酸化物を接触還元する方法
US7585477B2 (en) 2003-11-11 2009-09-08 Honda Motor Co., Ltd. Catalyst and method for catalytic reduction of nitrogen oxides
JP3812567B2 (ja) * 2003-12-01 2006-08-23 マツダ株式会社 排気ガス浄化用触媒材料、及びその製造方法
WO2006057067A1 (ja) * 2004-11-25 2006-06-01 Cataler Corporation 排ガス浄化用触媒
JP2006233774A (ja) * 2005-02-22 2006-09-07 Toyota Motor Corp 排ガス浄化装置及び排ガス浄化方法
US20090084090A1 (en) * 2005-04-11 2009-04-02 Tadao Nakatsuji Catalyst and Catalyst Structure for Reduction of Nitrogen Oxides, and Method for Catalytic Reduction of Nitrogen Oxides
KR100736703B1 (ko) 2005-07-08 2007-07-06 희성엥겔하드주식회사 디젤산화 활성이 개선된 이중층 촉매
JP4463248B2 (ja) 2006-07-31 2010-05-19 本田技研工業株式会社 ＮＯｘ低減化システムの制御方法
KR100756025B1 (ko) * 2006-08-28 2007-09-07 희성엥겔하드주식회사 내연기관 배기가스 정화용 삼중층 촉매시스템
JP5173180B2 (ja) * 2006-10-30 2013-03-27 株式会社キャタラー 排ガス浄化用触媒
CN101842157A (zh) * 2007-10-29 2010-09-22 株式会社Ict 氮氧化物去除用催化剂和使用该催化剂的氮氧化物去除方法
JP2009233587A (ja) * 2008-03-27 2009-10-15 Ngk Insulators Ltd 触媒付きディーゼルパティキュレートフィルタ及びその製造方法
JP4767296B2 (ja) * 2008-07-31 2011-09-07 本田技研工業株式会社 ＮＯｘ浄化触媒
EP2177256A1 (en) * 2008-10-15 2010-04-21 Linde AG Catalyst containing platinum and palladium for the selective reduction of NOx with hydrogen (H2-SCR)
WO2010071205A1 (ja) * 2008-12-19 2010-06-24 株式会社 キャタラー 排ガス浄化用触媒
EP3403722A1 (en) * 2010-06-10 2018-11-21 Basf Se Nox storage catalyst with improved hydrocarbon conversion activity
US8557204B2 (en) * 2010-11-22 2013-10-15 Umicore Ag & Co. Kg Three-way catalyst having an upstream single-layer catalyst
JP5664918B2 (ja) 2011-04-08 2015-02-04 トヨタ自動車株式会社 排ガス浄化用触媒
KR101950545B1 (ko) * 2012-04-06 2019-02-20 바스프 코포레이션 탄화수소 저장 기능을 갖는 희박 NOx 트랩 디젤 산화 촉매
GB2557673A (en) * 2016-12-15 2018-06-27 Johnson Matthey Plc NOx adsorber catalyst
US11370667B2 (en) * 2017-03-10 2022-06-28 Yushin Co. Ltd. Silicate mixture and combustion accelerator using the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04118053A (ja) * 1989-12-29 1992-04-20 Tokyo Roki Kk エンジンの排気ガス浄化用触媒
US5376610A (en) * 1992-04-15 1994-12-27 Nissan Motor Co., Ltd. Catalyst for exhaust gas purification and method for exhaust gas purification
JPH06190282A (ja) * 1992-12-25 1994-07-12 Idemitsu Kosan Co Ltd 排気ガス浄化用触媒
CA2165054A1 (en) * 1993-06-25 1995-01-05 Zhicheng Hu Layered catalyst composite

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR980000574A (ko) * 1996-06-17 1998-03-30 김영귀 질소산화물 정화용 촉매제조방법
KR100801880B1 (ko) * 2006-07-25 2008-02-12 오덱(주) 가솔린 자동차용 촉매

Also Published As

Publication number Publication date
JPH0910594A (ja) 1997-01-14
KR100388393B1 (ko) 2003-10-04
US5795840A (en) 1998-08-18
DE19617124A1 (de) 1996-10-31
DE19617124B4 (de) 2008-09-25

Similar Documents

Publication Publication Date Title
KR960037116A (ko) 배기가스 정화용 촉매
CA2131041A1 (en) Exhaust Emission Control Catalyst
KR940018546A (ko) 배기가스 정화용 촉매
KR960037117A (ko) 배기가스 정화용 촉매 및 그 제조방법
KR960021144A (ko) 배기가스 정화용 촉매
CA2027638A1 (en) Catalyst for purifying exhaust gases
KR910018081A (ko) 일체형 또는 벌집형 촉매
US6296813B1 (en) Exhaust emission control catalyst apparatus in internal combustion engine
AU2832584A (en) Exhaust gas conversion catalyst
KR970069126A (ko) 디젤 엔진으로부터 방출되는 배기 가스 정제용 촉매
KR970069118A (ko) 배기 가스 정화용 촉매
KR930019267A (ko) 자동차 엔진의 저질 배기가스 중의 질소 산화물(NOx)의 양을 감소시키는 방법 및 이에 사용되는 촉매
DE3463344D1 (en) Catalytic process for the treatment of exhaust gases
RU93044908A (ru) Носители катализатора
BR0101208A (pt) Catalisador de camada única de alto desempenho
CA2044984A1 (en) Catalyst for purifying exhaust gas from diesel engines
KR950024802A (ko) 배기 가스 정화용 촉매
KR920019413A (ko) 배기가스정화촉매체 및 그 제조방법
JPH0586849A (ja) 内燃機関の排気浄化装置
US5894013A (en) Catalyst for purifying exhaust gas
KR927002249A (ko) 연소 배기 가스로 부터 유기 염소 화합물의 제거방법
KR960033542A (ko) 디젤 엔진용 배기 가스 정화 촉매
KR960028968A (ko) 배기 가스 정화용 촉매
KR960028969A (ko) 질소산화물 함유 배기가스의 처리방법, 정화촉매 및 장치
JPS6415140A (en) Catalyst for purifying exhaust gas

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
LAPS Lapse due to unpaid annual fee