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KR910011326A - 배기가스의 정화방법 및 그 장치 - Google Patents

배기가스의 정화방법 및 그 장치 Download PDF

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Publication number
KR910011326A
KR910011326A KR1019900021949A KR900021949A KR910011326A KR 910011326 A KR910011326 A KR 910011326A KR 1019900021949 A KR1019900021949 A KR 1019900021949A KR 900021949 A KR900021949 A KR 900021949A KR 910011326 A KR910011326 A KR 910011326A
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catalyst
exhaust gas
purifying
metallic substrate
purifying exhaust
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시게히사 무라오까
가즈오 쯔찌따니
Original Assignee
다나까 쇼오소우
니혼 쇼꾸바이 가가꾸 고오교우 가부시끼가이샤
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Publication of KR910011326A publication Critical patent/KR910011326A/ko
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    • 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
    • B01D53/9459—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts
    • B01D53/9477—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts with catalysts positioned on separate bricks, e.g. exhaust systems
    • 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
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • 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
    • F01N3/2807—Metal other than sintered metal
    • 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
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • F01N3/2817—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates only with non-corrugated sheets, plates or foils
    • 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
    • B01D2255/1021—Platinum
    • 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
    • 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
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/06—Exhaust treating devices having provisions not otherwise provided for for improving exhaust evacuation or circulation, or reducing back-pressure
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/08—Exhaust treating devices having provisions not otherwise provided for for preventing heat loss or temperature drop, using other means than layers of heat-insulating material
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/06—Ceramic, e.g. monoliths
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/12—Metallic wire mesh fabric or knitting
    • 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
    • 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

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

Abstract

내용 없음

Description

배기가스의 정화방법 및 그 장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에 의한 내연기관 배기가스 정화용 장치의 개략단면도,
제2A도 내지 2H도는 본 발명의 제1촉매의 충전단면을 보인 개략도,
제3도는 미처리 기재를 0.1몰%의 황산수용액에서 1시간 처리하고 공기중에서 930℃로 1시간 소성한 후의 기재표면의 금속조직을 보이는 전자현미경사진.

Claims (21)

  1. 배기가스 유입측에 금속망 및 금속 다공판으로 이뤄진 군에서 선택된 적어도 1종의 금속성기재에 촉매물질을 담지시켜된 제1촉매를, 배기가스 유출측에 허니콤상 모놀리드 담채에 촉매물질을 담지시켜된 제2촉매를, 각각 배치하여된 촉매계에 배기가스를 유통시키는 것을 특징으로 하는 배기가스의 정화방법.
  2. 제1항에 있어서, 상기 제1촉매의 상기 제2촉매에 대한 벌크체적비가 1.0~4.0으로 구성되는 것을 특징으로 하는 배기가스의 정화방법.
  3. 제1항에 있어서, 상기 제1촉매의 개구율이 85%이상인 것을 특징으로 하는 배기가스의 정화방법.
  4. 제1항에 있어서, 배기가스 유입측의 상기 제1촉매로서 금속성기재의 표면에 알루미나층을 형성한 후 이 알루미나층에 촉매물질을 피복하여 이뤄진 촉매를 사용하는 것을 특징으로하는 배기가스의 정화방법.
  5. 제1항에 있어서, 상기 제1촉매로서 금속성기재를 산처리함으로써 표면에 미세구멍을 형성한뒤 촉매물질을 담지시켜 이뤄진 촉매를 사용하는 것을 특징으로 하는 배기가스의 정화방법.
  6. 제1항에 있어서, 상기 제1촉매로서 금속성기재를 산처리함으로써 미세가공을 형성하고 그 표면에 알루미나층을 형성한뒤, 촉매물질을 담지시켜 이뤄진 촉매를 사용하는 것을 특징으로 하는 배기가스의 정화 방법.
  7. 제5항에 있어서, 상기 미세구멍의 구멍직경이 0.1~0.5㎛인 것을 특징으로 하는 배기가스 정화방법.
  8. 제5항에 있어서, 상기 산이 황산, 염산 또는 질산용액이며, 그 농도가 0.01~5몰%의 범위인 것을 특징으로 하는 배기가스의 정화방법.
  9. 제4항에 있어서, 상기 금속성기재의 표면에 형성되는 상기 알루미나층이 위스커상인 것을 특징으로 하는 배기가스의 정화방법.
  10. 제1항에 있어서. 상기 제1촉매로서 금속성기재를 4가의 세륨염용액으로 표면 처리한 뒤 이 처리부에 촉매물질을 담지시켜 이뤄진 촉매를 사용하는 것을 특징으로 하는 배기가스의 정화방법.
  11. 제1항에 있어서, 상기 제1촉매로서 금속성기재를 4가의 세륨염용액으로 표면 처리한뒤, 그 표면에 알루미나층을 형성하고, 이 알루미나 층에 촉매물질을 담지시켜 이뤄진 촉매를 사용하는 것을 특징으로 하는 배기가스의 정화방법.
  12. 제10항에 있어서, 상기 4가의 세륨염용액의 황산염 또는 질산염의 수용액인 것을 특징으로 하는 배기가스의 정화방법.
  13. 제1항에 있어서, 상기 제1촉매의 촉매물질이 백금, 팔라듐 및 로듐으로 이뤄진 군으로부터 선택된 적어도 1종의 귀금속인 것을 특징으로 하는 배기가스의 정화방법.
  14. 제1항에 있어서, 배기가스 유출측의 상기 제2촉매의 촉매물질이 백금, 팔라듐 및 로듐으로 이뤄진 군으로부터 선택된 적어도 1종의 귀금속과, 내화성 무기산화물로 이뤄진 물질인 것을 특징으로 하는 배기가스의 정화방법.
  15. 제1항에 있어서 상기 제1촉매의 상기 제2촉매에 대한 벌크 체적비가 0.15~3.8인 것을 특징으로 하는 배기가스의 정화방법.
  16. 제15항에 있어서, 상기 제1촉매의 개구율이 85~99.7%인 것을 특징으로 하는 배기가스의 정화 방법.
  17. 복수개의 촉매를 설치하여된 배기가스 정화장치에 있어서, 배기가스 유입측에 금속망 및 금속다공판으로 이뤄진 군으로부터 선택된 적어도 1종의 금속성기재에 촉매물질을 담지시켜된 제1촉매를, 배기가스 유출측에 허니콤상 모놀리드 담체에 촉매물질을 담지시켜된 제2촉매를, 각각 배치하여 된 것을 특징으로 하는 배기가스의 정화방법.
  18. 제17항에 있어서, 상기 제1촉매의 상기 제2촉매에 대한 벌크 체적비가 1.0~4.0인 것을 특장으로 하는 배기가스의 정화장치.
  19. 제17항에 있어서, 상기 제1촉매의 개구율이 85%이상인 것을 특징으로 하는 배기가스의 정화방법.
  20. 제17항에 있어서, 상기 제1촉매는 엔진의 배기관에, 상기 제2촉매는 주컨버터에 각각 충전되는 것을 특징으로 하는 배기가스의 정화방법.
  21. 제18항에 있어서의, 상기 제1촉매의 상기 제2촉매에 대한 벌크 체적비가 0.15~3.8인 것을 특징으로 하는 배기가스의 정화장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019900021949A 1989-12-27 1990-12-27 배기가스의 정화방법 및 그 장치 Ceased KR910011326A (ko)

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JP33651589 1989-12-27
JP1-336515 1989-12-27

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KR910011326A true KR910011326A (ko) 1991-08-07

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JPH0814029A (ja) * 1994-06-24 1996-01-16 Toyota Motor Corp 内燃機関の排気ガス浄化装置
JP3614206B2 (ja) * 1995-05-25 2005-01-26 本田技研工業株式会社 内燃機関の排気浄化装置
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BR0014779B1 (pt) * 1999-10-15 2011-05-17 equipamento para remoção de pelo menos um óxido de nitrogênio a partir de um fluido.
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Publication number Priority date Publication date Assignee Title
KR101283308B1 (ko) * 2006-08-21 2013-07-12 현대자동차주식회사 불균일 촉매 분포 다층형 필터

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