KR860008798A - 배기가스 정화용 촉매 - Google Patents

배기가스 정화용 촉매 Download PDF

Info

Publication number
KR860008798A
KR860008798A KR1019860004045A KR860004045A KR860008798A KR 860008798 A KR860008798 A KR 860008798A KR 1019860004045 A KR1019860004045 A KR 1019860004045A KR 860004045 A KR860004045 A KR 860004045A KR 860008798 A KR860008798 A KR 860008798A
Authority
KR
South Korea
Prior art keywords
catalyst
deposited
alumina
activated alumina
rhodium
Prior art date
Application number
KR1019860004045A
Other languages
English (en)
Other versions
KR910004071B1 (ko
Inventor
도모히사 오오하따
도모히사 오오하다
사다오 데루이
에이이찌 시라이시
Original Assignee
닛뽕 쇼꾸바이 가가꾸 고오교 가부시끼가이샤
나까지마 미쓰루
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 닛뽕 쇼꾸바이 가가꾸 고오교 가부시끼가이샤, 나까지마 미쓰루 filed Critical 닛뽕 쇼꾸바이 가가꾸 고오교 가부시끼가이샤
Publication of KR860008798A publication Critical patent/KR860008798A/ko
Application granted granted Critical
Publication of KR910004071B1 publication Critical patent/KR910004071B1/ko

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
    • 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
    • B01J35/50—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
    • 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)

Abstract

내용 없음

Description

배기가스 정화용 촉매
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음

Claims (25)

  1. 수불용성 세륨 화합물을 수용성 알루미늄 화합물 및 알루미나 수화물의 군에서 선택된 일종이상의 화합물로 포화시키고, 포화생성물을 가소시킴으로써 수득된 알루미나-변형산화세륨, 백금, 팔라듐 및 로듐의 군에서 선택된 일종 이상의 귀금속 및 활성알루미나를 함유하는 촉매조성물을 단일체 벌집형 담체에 증착시킨 배기가스 정화용 촉매.
  2. 제1항에 있어서, 귀금속이 활성 알루미나 및 알루미나-변형 산화세륨의 군에서 선택된 일종이상의 분말에 미리분산 및 증착된 촉매.
  3. 제2항에 있어서, 귀금속이 활성알루미나에 미리 분산 및 증착된 촉매.
  4. 제2항에 있어서, 귀금속이 알루미나-변형 산화세륨에 미리 분산 및 증착된 촉매.
  5. 제2항에 있어서, 귀금속이 알루미나-변형산화 세륨 및 활성알루미나에 미리 분산 및 증착된 촉매.
  6. 제1항에 있어서, 알루미나-변형 산화세륨에서 알루미늄에 대한 세륨의 원자비 Ce/A1가 1∼20인 촉매.
  7. 제1항에 있어서, 수불용성세륨 화합물이 탄산세륨, 산화세륨 및 수산화 세륨의 군에서 선택된 촉매.
  8. 제1항에 있어서, 세륨 화합물이 탄산 세륨인 촉매.
  9. 제1항에 있어서, 수용성 알루미늄 화합물이 질산 알루미늄, 염화알루미늄 및 황산알루미늄의 군에서 선택된 촉매.
  10. 제1항에 있어서, 수용성 알루미늄 화합물이 질산 알루미늄인 촉매.
  11. 제1항에 있어서, 활성 알루미나가 50∼180㎡/g의 비표면을 갖는 촉매.
  12. 제1항에 있어서, 촉매 1ℓ당 촉매에 증착된 20∼200g의 활성 알루미나, 10∼150g의 알루미나-변형 산화세륨, 합계 0.1∼5g의 백금 및 팔라듐 및 0.01∼1g의 로듐을 함유하는 촉매.
  13. 제3항에 있어서, 로듐이 활성 알루미나에 미리 분산 및 증착된 촉매.
  14. 제13항에 있어서, 로듐이 활성 알루미나에 미리 분산 및 증착되고, 백금 및 팔라듐의 군에서 선택된 일종 이상의 귀금속이 이어서 로듐-함유 활성 알루미나에 분산 및 증착된 촉매.
  15. 제3항에 있어서, 백금 및 팔라듐의 군에서 선택된 일종이상의 귀금속이 미리 분산 및 증착된 촉매.
  16. 제15항에 있어서, 백금 및 팔라듐의 군에서 선택된 일종 이상의 귀금속이 미리 활성 알루미나에 분산 및 증착되고, 로듐이 이어서 귀금속-함유 활성 알루미나에 분산 및 증착된 촉매.
  17. 제3항에 있어서, 백금, 팔라듐 및 로듐이 미리 활성 알루미나에 분산 및 증착된 촉매.
  18. 제4항에 있어서, 로듐이 미리 알루미나-변형 산화 세륨에 분산 및 증착된 촉매.
  19. 제18항에 있어서, 로듐을 미리 알루미나-변형 산화 세륨에 분산 및 증착시키고, 수득된 로듐-함유 산화 세륨을 활성알루미나 및 백금 및 팔라듐의 군에서 선택된 일종이상의 귀금속과 혼합한 촉매.
  20. 제18항에 있어서, 로듐이 미리 알루미나-변형 산화세륨에 분산 및 증착되고, 백금 및 팔라듐의 군에서 선택된 일종이상의 귀금속이 미리 활성알루미나에 분산 및 증착된 촉매.
  21. 제2항에 있어서, 백금 및 팔라듐의 군에서 선택된 일종이상의 귀금속이 다염기성 카르복실산이 배합된 포화액체의 매질을 통해 분말에 단단히 분산 및 증착된 촉매.
  22. 제21항에 있어서, 분말이 활성알루미나인 촉매.
  23. 제22항에 있어서, 다염기성 카르복실산을 100g의 활성알루미나를 기준으로 0.1∼30g양으로 가한 촉매.
  24. 제21항에 있어서, 다염기성 카르복실산이 옥살산인 촉매.
  25. 제21항에 있어서, 다염기성 카르복실산이 시트르산인 촉매.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019860004045A 1985-05-23 1986-05-23 배기가스 정화용 촉매 KR910004071B1 (ko)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP10937285 1985-05-23
JP109372 1985-05-23
JP13778485 1985-06-26
JP137784 1985-06-26

Publications (2)

Publication Number Publication Date
KR860008798A true KR860008798A (ko) 1986-12-18
KR910004071B1 KR910004071B1 (ko) 1991-06-22

Family

ID=26449133

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019860004045A KR910004071B1 (ko) 1985-05-23 1986-05-23 배기가스 정화용 촉매

Country Status (6)

Country Link
US (1) US4708946A (ko)
EP (1) EP0203525B1 (ko)
JP (1) JPS6291244A (ko)
KR (1) KR910004071B1 (ko)
AT (1) ATE52200T1 (ko)
DE (1) DE3670579D1 (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100410942B1 (ko) * 2001-07-28 2003-12-18 현대자동차주식회사 다공성 팔라듐 삼원촉매의 제조방법

Families Citing this family (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4714694A (en) * 1986-06-30 1987-12-22 Engelhard Corporation Aluminum-stabilized ceria catalyst compositions, and methods of making the same
US4839146A (en) * 1987-04-15 1989-06-13 General Motors Corporation Catalyst for simultaneous NO decomposition and CO oxidation under cycled operating conditions
US4782038C1 (en) * 1987-10-26 2001-04-17 Ford Motor Co Platinum group alumina-supported metal oxidation catalysts and method of making same
JPH0622684B2 (ja) * 1987-11-24 1994-03-30 トヨタ自動車株式会社 排気ガス浄化用モノリス触媒
DE3803122C1 (ko) * 1988-02-03 1989-07-13 Degussa Ag, 6000 Frankfurt, De
US5286699A (en) * 1988-12-09 1994-02-15 Nippon Shokubai Kagaku Kogyo Co., Ltd. Exhaust gas purifying catalyst suppressing the generation of hydrogen sulfide and method of making the catalyst
JP2553678B2 (ja) * 1988-12-09 1996-11-13 松下電器産業株式会社 石油ストーブの燃焼ガス浄化用触媒
CA2011484C (en) * 1989-04-19 1997-03-04 Joseph C. Dettling Palladium-containing, ceria-supported platinum catalyst and catalyst assembly including the same
JP3113662B2 (ja) * 1990-02-26 2000-12-04 株式会社日本触媒 ディーゼルエンジン排ガス浄化用触媒体
US5064803A (en) * 1990-08-31 1991-11-12 Allied-Signal Inc. Preparation of three-way catalysts with highly dispersed ceria
US5081095A (en) * 1990-09-10 1992-01-14 General Motors Corporation Method of making a support containing an alumina-ceria washcoat for a noble metal catalyst
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
DE69417889T2 (de) * 1993-06-25 1999-10-07 Engelhard Corp., Iselin Zusammengesetzten schichtkatalysator
US5877377A (en) * 1993-08-14 1999-03-02 Johnson Matthey Public Limited Company Metal oxide catalyst and use thereof in chemical reactions
GB9316955D0 (en) 1993-08-14 1993-09-29 Johnson Matthey Plc Improvements in catalysts
US5514346A (en) * 1994-04-01 1996-05-07 Fujita; Sanai Dryer for deodorization and sterilization
US6044644A (en) * 1994-12-06 2000-04-04 Engelhard Corporation Close coupled catalyst
JP3664182B2 (ja) * 1994-12-19 2005-06-22 トヨタ自動車株式会社 高耐熱性排ガス浄化用触媒とその製造方法
US6129834A (en) * 1995-05-05 2000-10-10 W. R. Grace & Co. -Conn. NOx reduction compositions for use in FCC processes
US6165933A (en) 1995-05-05 2000-12-26 W. R. Grace & Co.-Conn. Reduced NOx combustion promoter for use in FCC processes
US6087298A (en) * 1996-05-14 2000-07-11 Engelhard Corporation Exhaust gas treatment system
US6509511B1 (en) * 1998-10-07 2003-01-21 Guild Associates, Inc. Process for the conversion of perfluoroalkanes, a catalyst for use therein and a method for its preparation
US5948377A (en) * 1996-09-04 1999-09-07 Engelhard Corporation Catalyst composition
US5981427A (en) * 1996-09-04 1999-11-09 Engelhard Corporation Catalyst composition
US5948723A (en) * 1996-09-04 1999-09-07 Engelhard Corporation Layered catalyst composite
US5898014A (en) * 1996-09-27 1999-04-27 Engelhard Corporation Catalyst composition containing oxygen storage components
US6248688B1 (en) 1996-09-27 2001-06-19 Engelhard Corporation Catalyst composition containing oxygen storage components
US6921738B2 (en) 1996-12-06 2005-07-26 Engelhard Corporation Catalytic metal plate
TW442324B (en) 1996-12-06 2001-06-23 Engelhard Corp Catalytic metal plate
US6110862A (en) * 1998-05-07 2000-08-29 Engelhard Corporation Catalytic material having improved conversion performance
CN1174802C (zh) 1999-03-18 2004-11-10 松下电工株式会社 水煤气转化反应催化剂、氢气中的一氧化碳去除方法及燃料电池发电系统
JP2003503191A (ja) * 1999-07-02 2003-01-28 エンゲルハード・コーポレーシヨン ディーゼルエンジン排気ガス処理用酸化触媒
DE10013895A1 (de) 2000-03-21 2001-10-04 Dmc2 Degussa Metals Catalysts Cerdec Ag Verfahren zur katalytischen Umsetzung von Kohlenmonoxid in einem Wasserstoff enthaltenden Gasgemisch
DE10013894A1 (de) 2000-03-21 2001-10-04 Dmc2 Degussa Metals Catalysts Verfahren zur katalytischen Umsetzung von Kohlenmonoxid in einem Wasserstoff enthaltenden Gasgemisch mit verbessertem Kaltstartverhalten und Katalysator hierfür
WO2002016260A1 (en) * 2000-08-18 2002-02-28 Matsushita Electric Industrial Co., Ltd. Hydrogen purification apparatus
JP4006976B2 (ja) 2000-11-15 2007-11-14 株式会社豊田中央研究所 複合酸化物粉末とその製造方法及び触媒
US20020174603A1 (en) * 2001-03-23 2002-11-28 Shabbir Ahmed Method for generating hydrogen for fuel cells
JP2003112058A (ja) * 2001-07-30 2003-04-15 Denso Corp セラミック触媒体
US20050205465A1 (en) * 2002-02-22 2005-09-22 Peters Alan W NOx reduction compositions for use in FCC processes
US6903051B2 (en) * 2002-04-12 2005-06-07 Corning Incorporated In situ theta alumina coated monolithic catalyst supports
JP4079717B2 (ja) * 2002-08-05 2008-04-23 株式会社日本自動車部品総合研究所 セラミック触媒体
JP4584555B2 (ja) * 2002-10-17 2010-11-24 株式会社デンソー セラミック触媒体
US7722854B2 (en) * 2003-06-25 2010-05-25 Velocy's Steam reforming methods and catalysts
US8277773B2 (en) 2004-02-13 2012-10-02 Velocys Corp. Steam reforming method
JP4313708B2 (ja) * 2003-06-27 2009-08-12 株式会社日本自動車部品総合研究所 セラミック担体
US20050054526A1 (en) * 2003-09-08 2005-03-10 Engelhard Corporation Coated substrate and process of preparation thereof
US7163963B2 (en) * 2003-09-08 2007-01-16 Conocophillips Company Chemically and thermally stabilized alumina for Fischer-Tropsch catalysts
US20050153836A1 (en) * 2004-01-13 2005-07-14 Yuichi Matsuo Purification catalyst for exhaust gas, production method therefor, and purification catalyst device for exhaust gas
JP4204487B2 (ja) * 2004-01-21 2009-01-07 本田技研工業株式会社 排ガス浄化触媒及びその製造方法、並びに車用排ガス浄化触媒装置
US20050164879A1 (en) * 2004-01-28 2005-07-28 Engelhard Corporation Layered SOx tolerant NOx trap catalysts and methods of making and using the same
US7678347B2 (en) * 2005-07-15 2010-03-16 Basf Catalysts Llc High phosphorous poisoning resistant catalysts for treating automobile exhaust
KR100747167B1 (ko) * 2005-11-10 2007-08-07 현대자동차주식회사 불균일 2중층 코팅구조의 삼원촉매 제조방법
US8119075B2 (en) * 2005-11-10 2012-02-21 Basf Corporation Diesel particulate filters having ultra-thin catalyzed oxidation coatings
US7506504B2 (en) * 2005-12-21 2009-03-24 Basf Catalysts Llc DOC and particulate control system for diesel engines
US7749472B2 (en) * 2006-08-14 2010-07-06 Basf Corporation Phosgard, a new way to improve poison resistance in three-way catalyst applications
US7550124B2 (en) 2006-08-21 2009-06-23 Basf Catalysts Llc Layered catalyst composite
US7754171B2 (en) * 2007-02-02 2010-07-13 Basf Corporation Multilayered catalyst compositions
US8038951B2 (en) 2007-08-09 2011-10-18 Basf Corporation Catalyst compositions
US7922988B2 (en) * 2007-08-09 2011-04-12 Michel Deeba Multilayered catalyst compositions
US20140112849A1 (en) 2011-06-21 2014-04-24 Umicore Ag & Co., Kg Method for the depositon of metals on support oxides
CN107335447B (zh) * 2017-06-15 2020-10-27 华南理工大学 一种用于净化挥发性有机物的催化剂及其制备方法
JP6764451B2 (ja) * 2018-09-12 2020-09-30 イビデン株式会社 ハニカム構造体の製造方法
JP6771005B2 (ja) * 2018-09-12 2020-10-21 イビデン株式会社 ハニカム構造体の製造方法
CN111215065B (zh) * 2018-11-26 2023-03-14 中国科学院大连化学物理研究所 水汽变换催化剂及制备和应用
US11745169B1 (en) * 2019-05-17 2023-09-05 Unm Rainforest Innovations Single atom metal doped ceria for CO oxidation and HC hydrogenation/oxidation
BR112021025763A2 (pt) * 2019-06-27 2022-02-22 Basf Corp Artigo catalítico, processos para a preparação de um artigo catalítico, sistema de tratamento de gás de escape para motores de combustão interna, métodos para tratar uma corrente de escape gasosa e para reduzir níveis de hidrocarbonetos e uso de um artigo catalítico
CN114364459A (zh) * 2019-10-18 2022-04-15 优美科触媒日本有限公司 废气净化用催化剂、废气的净化方法和废气净化用催化剂的制造方法
CN112675845B (zh) * 2020-12-28 2022-03-29 四川大学 一种用于天然气车尾气净化的Pd-Rh单涂层催化剂及其制备方法
EP4173702A1 (en) * 2021-10-26 2023-05-03 Johnson Matthey Public Limited Company Polymaleic acid assisted metal nanoparticle synthesis for three-way catalysis application
CN114588894B (zh) * 2022-03-22 2023-06-16 中国科学院赣江创新研究院 一种铑基催化剂及其制备方法与应用

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4206087A (en) * 1977-01-06 1980-06-03 Engelhard Minerals & Chemicals Corporation Catalyst for reducing pollutants in waste gas streams and process for preparing the catalyst
DE2908671A1 (de) * 1979-03-06 1980-09-25 Degussa Verbesserte traegermatrix fuer katalysatoren
US4331565A (en) * 1980-11-28 1982-05-25 General Motors Corporation Method for forming high surface area catalyst carrier and catalyst using same
CA1213874A (en) * 1983-05-12 1986-11-12 Tomohisa Ohata Process for producing honeycomb catalyst for exhaust gas conversion
GB2141634A (en) * 1983-05-23 1985-01-03 Atomic Energy Authority Uk Lead resistant catalyst
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
JPS60206447A (ja) * 1984-03-29 1985-10-18 Nissan Motor Co Ltd 排気ガス浄化用触媒の製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100410942B1 (ko) * 2001-07-28 2003-12-18 현대자동차주식회사 다공성 팔라듐 삼원촉매의 제조방법

Also Published As

Publication number Publication date
JPS6291244A (ja) 1987-04-25
ATE52200T1 (de) 1990-05-15
KR910004071B1 (ko) 1991-06-22
US4708946A (en) 1987-11-24
EP0203525A1 (en) 1986-12-03
DE3670579D1 (de) 1990-05-31
JPH0574415B2 (ko) 1993-10-18
EP0203525B1 (en) 1990-04-25

Similar Documents

Publication Publication Date Title
KR860008798A (ko) 배기가스 정화용 촉매
US6066587A (en) Catalyst for purifying exhaust gas
KR920014516A (ko) 디젤 엔진 배기 가스-정화 촉매
US4206087A (en) Catalyst for reducing pollutants in waste gas streams and process for preparing the catalyst
KR850005946A (ko) 배기가스 정제용 단일체 촉매의 제조방법
Klimisch et al. Ammonia intermediacy as a basis for catalyst selection for nitric oxide reduction
CA1335279C (en) Catalyst for purifying the exhaust gases produced by internal combustion engines while reducing the emission of hydrogen sulfide production of this catalyst and the use thereof
KR910009331A (ko) 3원 전환 촉매 및 그 사용방법
SE417790B (sv) Sett att framstella en katalysator
CA2159489A1 (en) Gasoline additives for catalytic control of emissions from combustion engines
KR920006028A (ko) 순수하거나 기체 혼합물중에 존재하는 산화 이질소의 촉매식 분해
KR910009330A (ko) 산화제이세륨 함유 산화지르콘 지지체를 포함한 삼원 전환 촉매
ATE148003T1 (de) Verfahren zur entfernung des sauerstoff-, nitrit- und/oder nitratgehaltes in wasser
KR880010823A (ko) 촉매담체용 워시코우트(wash coat)
GB1459711A (en) Catalyst carrier method of producing the same and catalyst compri sing the same
US3844980A (en) Catalyst for use in purification of exhaust gases
JPS57127446A (en) Catalyst for gas purification
KR900009132A (ko) 황화수소의 발생을 억제하는 배기가스 정화용 촉매
Yoon et al. Synergism and kinetics in CO oxidation over palladium-rhodium bimetallic catalysts
KR100230874B1 (ko) 압축천연가스 자동차 배기가스 정화용 촉매 및 그의 정화 방법
JPH02237643A (ja) 排気ガス浄化用触媒の製造方法
KR880007126A (ko) 배기가스 정화용 촉매 및 그의 제조방법
JPH1190235A (ja) ディーゼルエンジン排ガス浄化用触媒及び浄化方法
JPS54133488A (en) Exhaust gas cleaning catalyst
TW421609B (en) A preparation method of the catalytic converter for controlling exhaust emissions from motorcycles

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
LAPS Lapse due to unpaid annual fee