JP2011527404A - 希薄燃焼内燃機関の排気ガス用の二元触媒NOx還元システム - Google Patents
希薄燃焼内燃機関の排気ガス用の二元触媒NOx還元システム Download PDFInfo
- Publication number
- JP2011527404A JP2011527404A JP2011517517A JP2011517517A JP2011527404A JP 2011527404 A JP2011527404 A JP 2011527404A JP 2011517517 A JP2011517517 A JP 2011517517A JP 2011517517 A JP2011517517 A JP 2011517517A JP 2011527404 A JP2011527404 A JP 2011527404A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- exhaust gas
- gas stream
- nitrogen
- ammonia
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Images
Classifications
-
- 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
- F01N3/18—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 methods of operation; Control
- F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- 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
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
- B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
-
- 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
- B01D53/9495—Controlling the catalytic process
-
- 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 ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
- F01N13/0093—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are of the same type
-
- 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
- F01N3/18—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 methods of operation; Control
- F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- 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
- F01N3/18—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 methods of operation; Control
- F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/2073—Selective catalytic reduction [SCR] with means for generating a reducing substance from the exhaust gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/202—Hydrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/208—Hydrocarbons
-
- 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
- B01D2255/104—Silver
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20738—Iron
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20761—Copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/209—Other metals
- B01D2255/2092—Aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/50—Zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/014—Stoichiometric gasoline engines
-
- 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
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/25—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an ammonia generator
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/021—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting ammonia NH3
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/04—Adding substances to exhaust gases the substance being hydrogen
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Toxicology (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas After Treatment (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Catalysts (AREA)
Abstract
【選択図】図1
Description
部分酸化炭化水素(例えば、アルコール)をAg/Al2O3上で使用することにより、NOxを低温で還元させることができる。しかし、このような還元剤は、典型的には、車両に搭載して利用することは不可能である。他の従来技術によるアプローチでは、Ag/Al2O3触媒上のHC−SCRは、軽質炭化水素(例えば、プロペン、プロパン)およびこれよりも重い燃料成分炭化水素(例えば、オクタン、デカン)を還元剤として利用する。エンジン排気ガス中に燃焼生成物としてすでに存在しているより軽質の炭化水素を使用するNOx還元は、より高い温度で変換を引き起こすが、実用的な用途向けの候補として考えられるAg/Al2O3触媒については、NOx還元はより低い温度領域へシフトされなければならず、また車両に積載する燃料が還元剤として使用されなければならない。
本発明は、実施例により、付属の図面を参照しつつ説明される。
第2の触媒14は、第1の触媒12から出るNH3(および他の窒素種)およびNOxと反応しNOxからN2への全変換(項目36)をさらに改善するアンモニアSCR(または尿素SCR)触媒であり、これの簡素化された不平衡反応は、
したがって、排気管18から出る排気ガス流26は、N2、CO2、H2O、およびO2を含む。
Claims (21)
- 内燃機関の排気ガス流中の二酸化窒素および一酸化窒素の割合を低減するためのシステムであって、
a)前記窒素酸化物の一部を窒素、アンモニア、および他の窒素含有化学種に選択的に還元するための第1の触媒と、
b)前記窒素酸化物の一部、前記アンモニアおよび前記窒素含有化学種を窒素分子に選択的に還元するための第2の触媒と、
c)少なくとも1つの炭化水素化合物を前記排出ガス流中に注入するように前記第1の触媒の上流に配置されるインジェクタと、
d)前記排気ガス流が前記第1の触媒および前記第2の触媒のうちの少なくとも一方の触媒を通過した後に前記排気ガス流中の少なくともアンモニアの濃度を検知するように、前記第1の触媒および前記第2の触媒のうちの前記少なくとも一方の触媒の下流に配置されているセンサーと、
e)コントローラにプログラムされたアルゴリズムに従って、前記センサーのところで所定の濃度のアンモニアおよび窒素酸化物を生成する、一定量の前記炭化水素を注入するように、前記センサーおよび前記インジェクタとフィードバックループ内で連通するプログラムされた前記コントローラと、
を備えるシステム。 - 前記第1の触媒は、さらに、炭化水素を一酸化炭素、二酸化炭素および水に酸化する、請求項1に記載のシステム。
- 前記内燃機関は希薄燃焼運転用に装備され、前記排気ガス流中に自由酸素分子を形成する、請求項1に記載のシステム。
- 前記第1の触媒は、銀およびアルミナを備える、請求項1に記載のシステム。
- 前記第2の触媒は、バナジアとゼオライトとからなる群から選択される、請求項1に記載のシステム。
- 前記ゼオライトは、鉄ゼオライトと銅ゼオライトとからなる群から選択される、請求項5に記載のシステム。
- 前記センサーは、前記第1の触媒の後の前記排気ガス流中に配設される、請求項1に記載のシステム。
- 前記センサーは、前記第2の触媒の後の前記排気ガス流中に配設される、請求項1に記載のシステム。
- 前記センサーは、第1のセンサーであり、第2のセンサーが、前記第1の触媒と前記第2の触媒との間に配設される、請求項8に記載のシステム。
- 前記第1のセンサーおよび前記第2のセンサーのうちの少なくとも一方は、アンモニア、一酸化窒素、および二酸化窒素に敏感である、請求項9に記載のシステム。
- 前記インジェクタは、水素分子を前記排出ガス流中に注入するように適合され、前記コントローラは、前記センサーから受け取った信号に応答して所定の量の前記水素分子を注入するようにプログラムされている、請求項1に記載のシステム。
- 前記排出ガス流中の前記炭化水素の濃度は、所定の値に合わせて調節される、請求項1に記載のシステム。
- 前記所定の値は、前記第1の触媒の後の前記排気ガス流中で約0.1から約2.0までのアンモニア対窒素酸化物濃度比を生じる、請求項12に記載のシステム。
- 目標濃度比は、約1.0である、請求項13に記載のシステム。
- 前記所定の値は、前記第1の触媒に入る前に前記排気ガス流中で約1から約9までの炭素対窒素濃度比を生じる、請求項12に記載のシステム。
- 前記炭化水素は、ディーゼル燃料、バイオディーゼル、ガソリン、E85、E100、および他の輸送燃料からなる群から選択される、請求項1に記載のシステム。
- 前記内燃機関は、予混合低温ディーゼル燃焼が可能なエンジンを含む、火花点火エンジンおよび圧縮点火エンジンからなる群から選択される、請求項1に記載のシステム。
- 内燃機関の排気ガス流中の二酸化窒素および一酸化窒素の割合を低減するためのシステムを備える内燃機関であって、
前記窒素酸化物の一部を窒素、アンモニア、および他の窒素含有化学種に選択的に還元するための第1の触媒と、
前記窒素酸化物の一部、前記アンモニアおよび前記窒素含有化学種を窒素分子に選択的に還元するための第2の触媒と、
少なくとも1つの炭化水素化合物を前記排出ガス流中に注入するように、前記第1の触媒の上流に配置されるインジェクタと、
前記排気ガス流が前記第1の触媒および前記第2の触媒のうちの少なくとも一方の触媒を通過した後に前記排気ガス流中の少なくともアンモニアの濃度を検知するように、前記第1の触媒および前記第2の触媒のうちの前記少なくとも一方の触媒の下流に配置されているセンサーと、
コントローラにプログラムされたアルゴリズムに従って、前記センサーのところで所定の濃度のアンモニアおよび窒素酸化物を生成する、一定量の前記炭化水素を注入するように、前記センサーおよび前記インジェクタとフィードバックループ内で連通するプログラムされた前記コントローラと、
を備える内燃機関。 - 内燃機関の排気ガス流中の二酸化窒素および一酸化窒素の割合を低減するための方法であって、
a)少なくとも1つの炭化水素化合物を前記排出ガス流中に注入する工程と、
b)前記二酸化窒素の一部を一酸化窒素とアンモニアとに選択的に還元するように、前記注入された排気ガス流を第1の触媒に通す工程と、
c)前記一酸化窒素およびアンモニアの一部を窒素分子および水に選択的に還元するように、前記注入された排気ガス流を第2の触媒に通す工程と、
d)前記注入された排気ガス流を前記第1の触媒および前記第2の触媒のうちの少なくとも一方に通した後に前記注入された排出ガス流中の少なくともアンモニア濃度を検知する工程と、
e)前記センサーのところで所定の濃度のアンモニアおよび窒素酸化物を生成する一定量の前記炭化水素に対して、前記注入する工程を制御する工程と、
を含む方法。 - 一定量の水素分子を前記第1の触媒の前の前記排出ガス流中に注入するさらなる工程を含む、請求項19に記載の方法。
- 注入された量の前記炭化水素および水素分子は、前記第1の触媒の後の注入された前記排気ガス流中で約1対1を目標値とするアンモニア対窒素酸化物濃度比を生じる、請求項19に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/217,568 US8245500B2 (en) | 2008-07-07 | 2008-07-07 | Dual catalyst NOx reduction system for exhaust from lean burn internal combustion engines |
US12/217,568 | 2008-07-07 | ||
PCT/US2009/049770 WO2010005941A1 (en) | 2008-07-07 | 2009-07-07 | Dual catalyst nox reduction system for lean burn internal combustion engines exhaust |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2011527404A true JP2011527404A (ja) | 2011-10-27 |
Family
ID=41463287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011517517A Pending JP2011527404A (ja) | 2008-07-07 | 2009-07-07 | 希薄燃焼内燃機関の排気ガス用の二元触媒NOx還元システム |
Country Status (4)
Country | Link |
---|---|
US (1) | US8245500B2 (ja) |
EP (1) | EP2313621A4 (ja) |
JP (1) | JP2011527404A (ja) |
WO (1) | WO2010005941A1 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012097729A (ja) * | 2010-10-08 | 2012-05-24 | Hino Motors Ltd | 排ガス浄化装置 |
JP2013122178A (ja) * | 2011-12-09 | 2013-06-20 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
KR20180028151A (ko) * | 2016-09-08 | 2018-03-16 | 현대중공업 주식회사 | Scr 시스템의 환원제 공급장치 |
CN109268110A (zh) * | 2012-04-27 | 2019-01-25 | 优美科两合公司 | 用于净化来自内燃机的废气的方法和系统 |
JP2019148232A (ja) * | 2018-02-27 | 2019-09-05 | 東京濾器株式会社 | 排気ガス処理システム、排気ガス浄化方法 |
JP2019190381A (ja) * | 2018-04-25 | 2019-10-31 | 東京濾器株式会社 | 排気ガス処理システム |
JP2020090949A (ja) * | 2018-12-07 | 2020-06-11 | 国立研究開発法人産業技術総合研究所 | 燃焼システム |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100101221A1 (en) * | 2008-10-28 | 2010-04-29 | Caterpillar Inc. | CATALYSTS, SYSTEMS, AND METHODS FOR REDUCING NOx IN AN EXHAUST GAS |
US20100229539A1 (en) * | 2009-03-16 | 2010-09-16 | Caterpillar Inc. | Hydrocarbon scr aftertreatment system |
US20110283685A1 (en) * | 2009-04-27 | 2011-11-24 | Kotrba Adam J | Exhaust Treatment System With Hydrocarbon Lean NOx Catalyst |
US8904760B2 (en) * | 2009-06-17 | 2014-12-09 | GM Global Technology Operations LLC | Exhaust gas treatment system including an HC-SCR and two-way catalyst and method of using the same |
US8381514B2 (en) * | 2010-02-17 | 2013-02-26 | Tenneco Automotive Operating Company Inc. | On-vehicle nitrogen oxide aftertreatment system |
US9038373B2 (en) | 2010-05-03 | 2015-05-26 | Cummins Inc. | Ammonia sensor control of an SCR aftertreatment system |
US8640448B2 (en) | 2010-05-03 | 2014-02-04 | Cummins Inc. | Transient compensation control of an SCR aftertreatment system |
US9476338B2 (en) | 2010-05-03 | 2016-10-25 | Cummins Inc. | Ammonia sensor control, with NOx feedback, of an SCR aftertreatment system |
KR101476901B1 (ko) * | 2010-05-05 | 2014-12-26 | 바스프 코포레이션 | 촉매 매연 필터 및 배출물 처리 시스템 및 방법 |
EP2423478A3 (en) * | 2010-08-31 | 2015-11-18 | General Electric Company | Exhaust treatment system and method of operation |
US8745969B2 (en) * | 2010-09-08 | 2014-06-10 | GM Global Technology Operations LLC | Methods for engine exhaust NOx control using no oxidation in the engine |
GB2485530A (en) * | 2010-11-11 | 2012-05-23 | Johnson Matthey Plc | Catalyst system |
GB201111180D0 (en) * | 2011-05-20 | 2011-08-17 | Johnson Matthey Plc | System and method for generating NO2 |
US9145805B2 (en) | 2011-09-05 | 2015-09-29 | Hino Motors, Ltd. | Exhaust gas purifier |
US8745974B2 (en) | 2012-01-31 | 2014-06-10 | Caterpillar Inc. | Exhaust system |
DE102012007890B4 (de) * | 2012-04-23 | 2014-09-04 | Clariant Produkte (Deutschland) Gmbh | Abgasreinigungssystem zur Reinigung von Abgasströmen aus Dieselmotoren |
US9194266B2 (en) | 2012-07-27 | 2015-11-24 | Caterpillar Inc. | Exhaust system |
CN102854184B (zh) * | 2012-09-07 | 2014-07-02 | 天津世纪动力科技发展有限公司 | 发动机尾气中氨气、氮氧化物共测专用测量系统 |
US9808763B2 (en) | 2015-12-08 | 2017-11-07 | Caterpillar Inc. | Catalyst system for lean NOx reduction with hydrocarbons |
US20190353071A1 (en) * | 2018-05-18 | 2019-11-21 | GM Global Technology Operations LLC | Selective catalytic reduction device control |
US11220437B2 (en) | 2018-12-24 | 2022-01-11 | Ecometales Limited | Procedure for obtaining scorodite with a high arsenic content from acidic solutions with high content of sulfuric acid |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0760119A (ja) * | 1993-08-26 | 1995-03-07 | Agency Of Ind Science & Technol | 排ガス浄化材及び排ガス浄化方法 |
JPH11511226A (ja) * | 1995-11-09 | 1999-09-28 | トヨタ自動車株式会社 | 内燃機関の排気を浄化する方法および装置 |
JP2006322327A (ja) * | 2005-05-17 | 2006-11-30 | Isuzu Motors Ltd | 排気ガス浄化方法及び排気ガス浄化システム |
US20070012032A1 (en) * | 2005-07-12 | 2007-01-18 | Eaton Corporation | Hybrid system comprising HC-SCR, NOx-trapping, and NH3-SCR for exhaust emission reduction |
WO2007064412A1 (en) * | 2005-11-30 | 2007-06-07 | Caterpillar Inc. | Multi-stage system for selective catalytic reduction |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5168085A (en) * | 1991-05-20 | 1992-12-01 | Corning Incorporated | Multi-stage twc system |
US6029442A (en) * | 1996-12-18 | 2000-02-29 | Litex, Inc. | Method and apparatus for using free radicals to reduce pollutants in the exhaust gases from the combustion of fuel |
US6182443B1 (en) * | 1999-02-09 | 2001-02-06 | Ford Global Technologies, Inc. | Method for converting exhaust gases from a diesel engine using nitrogen oxide absorbent |
US7198764B2 (en) * | 2003-03-05 | 2007-04-03 | Delphi Technologies, Inc. | Gas treatment system and a method for using the same |
GB0318776D0 (en) | 2003-08-09 | 2003-09-10 | Johnson Matthey Plc | Lean NOx catalyst |
US6996975B2 (en) * | 2004-06-25 | 2006-02-14 | Eaton Corporation | Multistage reductant injection strategy for slipless, high efficiency selective catalytic reduction |
US7213395B2 (en) * | 2004-07-14 | 2007-05-08 | Eaton Corporation | Hybrid catalyst system for exhaust emissions reduction |
JP4686553B2 (ja) | 2005-02-28 | 2011-05-25 | 田中貴金属工業株式会社 | 炭化水素またはアルコールにより排気流中の窒素酸化物を還元するための触媒および方法 |
US7168243B2 (en) * | 2005-03-07 | 2007-01-30 | Caterpillar Inc | NOx adsorber and method of regenerating same |
US7743602B2 (en) * | 2005-06-21 | 2010-06-29 | Exxonmobil Research And Engineering Co. | Reformer assisted lean NOx catalyst aftertreatment system and method |
US7396517B2 (en) * | 2005-08-05 | 2008-07-08 | Gm Global Technology Operations, Inc. | Reduction of NOx emissions using a staged silver/alumina catalyst system |
US7562522B2 (en) * | 2006-06-06 | 2009-07-21 | Eaton Corporation | Enhanced hybrid de-NOx system |
US8006481B2 (en) | 2006-09-20 | 2011-08-30 | GM Global Technology Operations LLC | Method and apparatus to selectively reduce NOx in an exhaust gas feedstream |
JP4699331B2 (ja) * | 2006-10-20 | 2011-06-08 | 本田技研工業株式会社 | 内燃機関の排気浄化装置 |
US20080131345A1 (en) * | 2006-11-30 | 2008-06-05 | Frederic Vitse | Multi-bed selective catalytic reduction system and method for reducing nitrogen oxides emissions |
-
2008
- 2008-07-07 US US12/217,568 patent/US8245500B2/en active Active
-
2009
- 2009-07-07 JP JP2011517517A patent/JP2011527404A/ja active Pending
- 2009-07-07 EP EP09795046.3A patent/EP2313621A4/en not_active Withdrawn
- 2009-07-07 WO PCT/US2009/049770 patent/WO2010005941A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0760119A (ja) * | 1993-08-26 | 1995-03-07 | Agency Of Ind Science & Technol | 排ガス浄化材及び排ガス浄化方法 |
JPH11511226A (ja) * | 1995-11-09 | 1999-09-28 | トヨタ自動車株式会社 | 内燃機関の排気を浄化する方法および装置 |
JP2006322327A (ja) * | 2005-05-17 | 2006-11-30 | Isuzu Motors Ltd | 排気ガス浄化方法及び排気ガス浄化システム |
US20070012032A1 (en) * | 2005-07-12 | 2007-01-18 | Eaton Corporation | Hybrid system comprising HC-SCR, NOx-trapping, and NH3-SCR for exhaust emission reduction |
WO2007064412A1 (en) * | 2005-11-30 | 2007-06-07 | Caterpillar Inc. | Multi-stage system for selective catalytic reduction |
JP2009517210A (ja) * | 2005-11-30 | 2009-04-30 | キャタピラー インコーポレイテッド | 選択的触媒還元用の多段システム |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012097729A (ja) * | 2010-10-08 | 2012-05-24 | Hino Motors Ltd | 排ガス浄化装置 |
JP2013122178A (ja) * | 2011-12-09 | 2013-06-20 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
CN109268110A (zh) * | 2012-04-27 | 2019-01-25 | 优美科两合公司 | 用于净化来自内燃机的废气的方法和系统 |
CN109268110B (zh) * | 2012-04-27 | 2021-05-07 | 优美科两合公司 | 用于净化来自内燃机的废气的方法和系统 |
KR20180028151A (ko) * | 2016-09-08 | 2018-03-16 | 현대중공업 주식회사 | Scr 시스템의 환원제 공급장치 |
KR102219051B1 (ko) | 2016-09-08 | 2021-02-22 | 한국조선해양 주식회사 | Scr 시스템의 환원제 공급장치 |
JP2019148232A (ja) * | 2018-02-27 | 2019-09-05 | 東京濾器株式会社 | 排気ガス処理システム、排気ガス浄化方法 |
JP2019190381A (ja) * | 2018-04-25 | 2019-10-31 | 東京濾器株式会社 | 排気ガス処理システム |
WO2019208478A1 (ja) * | 2018-04-25 | 2019-10-31 | 東京濾器株式会社 | 排気ガス処理システム、排気ガス浄化方法 |
JP2020090949A (ja) * | 2018-12-07 | 2020-06-11 | 国立研究開発法人産業技術総合研究所 | 燃焼システム |
JP7153327B2 (ja) | 2018-12-07 | 2022-10-14 | 国立研究開発法人産業技術総合研究所 | 燃焼システム |
Also Published As
Publication number | Publication date |
---|---|
US20100000202A1 (en) | 2010-01-07 |
EP2313621A1 (en) | 2011-04-27 |
EP2313621A4 (en) | 2015-05-13 |
WO2010005941A1 (en) | 2010-01-14 |
US8245500B2 (en) | 2012-08-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2011527404A (ja) | 希薄燃焼内燃機関の排気ガス用の二元触媒NOx還元システム | |
CN101559325B (zh) | 还原汽油发动机废气流中的排放物的催化剂系统及其方法 | |
EP1458960B1 (en) | Improvements in selective catalytic reduction | |
KR101060125B1 (ko) | 희박 연소 ic 엔진용 배기 시스템 | |
US6508057B1 (en) | Process and device intended for nitrogen oxides elimination in an exhaust line of an internal-combustion engine | |
Xu et al. | LNT+ in situ SCR catalyst system for diesel emissions control | |
AU2005293349B2 (en) | Method of decomposing nitrogen dioxide | |
US20070271908A1 (en) | Engine exhaust emission control system providing on-board ammonia generation | |
EP3111072A1 (en) | Device and method for impacting the amount of nitrogen oxides in exhaust gases from an internal combustion engine | |
JP4686547B2 (ja) | 排気ガス浄化を伴う機関駆動車両 | |
Kim et al. | Three-way catalyst design for urealess passive ammonia SCR: Lean-burn SIDI aftertreatment system | |
US20180223712A1 (en) | Vehicle having a nitrogen oxides storage converter and on-board method for monitoring and diagnosing the nitrogen oxides storage converter | |
Theis et al. | LNT+ SCR catalyst systems optimized for NO x conversion on diesel applications | |
Schmieg et al. | Evaluation of supplier catalyst formulations for the selective catalytic reduction of NO x with ammonia | |
Theis et al. | Passive TWC+ SCR systems for satisfying tier 2, bin 2 emission standards on lean-burn gasoline engines | |
US10167758B2 (en) | Product for the depollution of exhaust gases, especially from an internal combustion engine, and method for the depollution of exhaust gases using said product | |
Theis et al. | A LNT+ SCR system for treating the NOx emissions from a diesel engine | |
DiMaggio et al. | Dual SCR aftertreatment for lean NOx reduction | |
Purohit et al. | An investigation on the regeneration of lean NOx trap using ethanol and n-butanol | |
Liao et al. | An experimental investigation of particle and NOx emissions for a non-road diesel engine equipped with an integrated DOC+ CDPF+ SCR aftertreatment system during different operations | |
Theis et al. | TWC+ LNT/SCR systems for satisfying tier 2, bin 2 emission standards on lean-burn gasoline engines | |
Többen et al. | Formation of N 2 O in the Exhaust Line of Combustion Engines | |
US10526947B2 (en) | Exhaust aftertreatment system | |
Johnson | SAE 2010 World Congress | |
Theis | Selective Catalytic Reduction for Treating the NOx Emissions from Lean-Burn Gasoline Engines: Durability Assessment |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20120206 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20130311 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20130409 |
|
A601 | Written request for extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A601 Effective date: 20130704 |
|
A602 | Written permission of extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A602 Effective date: 20130711 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20131008 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20140527 |
|
A601 | Written request for extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A601 Effective date: 20140826 |
|
A602 | Written permission of extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A602 Effective date: 20140902 |
|
A601 | Written request for extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A601 Effective date: 20140929 |
|
A602 | Written permission of extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A602 Effective date: 20141006 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20141121 |
|
A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20150331 |