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SE1750309A1 - Förfarande för övervakning av en metanoxidationskatalysator och en avgasreningsenhet. - Google Patents

Förfarande för övervakning av en metanoxidationskatalysator och en avgasreningsenhet. Download PDF

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Publication number
SE1750309A1
SE1750309A1 SE1750309A SE1750309A SE1750309A1 SE 1750309 A1 SE1750309 A1 SE 1750309A1 SE 1750309 A SE1750309 A SE 1750309A SE 1750309 A SE1750309 A SE 1750309A SE 1750309 A1 SE1750309 A1 SE 1750309A1
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Prior art keywords
oxidation catalyst
methane oxidation
scr catalyst
catalyst device
exhaust system
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SE1750309A
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English (en)
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SE541544C2 (sv
Inventor
Gloeckle Markus
Christl Werner
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Bosch Gmbh Robert
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Publication of SE1750309A1 publication Critical patent/SE1750309A1/sv
Publication of SE541544C2 publication Critical patent/SE541544C2/sv

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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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • 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
    • 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
    • F01N3/10—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
    • 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
    • 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
    • F01N3/24—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
    • F02D19/0647—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being liquefied petroleum gas [LPG], liquefied natural gas [LNG], compressed natural gas [CNG] or dimethyl ether [DME]
    • 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
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/02—Catalytic activity of catalytic converters
    • 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
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/12—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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
    • F01N2900/1404—Exhaust gas temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/406—Cells and probes with solid electrolytes
    • G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
    • 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
    • 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
    • Y02T10/40—Engine management systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

Vid ett förfarande för övervakning av en metanoxidationskatalysator (420) i avgassystemet hos en förbränningsmotor (400) utförs med ledning av ett bildande av N0i metanoxidationskatalysatorn (420) en aktivitetsdiagnos av metanoxidationskatalysatorn (420), varvid utgående från bildandet av N0och särskilt från N0-halten och / eller N0-/NOx-förhållandet i eller efter metanoxidationskatalysatorn dras en slutsats om metanomvandlingsförmågan hos metanoxidationskatalysatorn (420). Utgående från ett i förekommande fall minskat bildande av N0dras en slutsats om en försämrad metanomvandlingsförmåga hos metanoxidationskatalysatorn (420). För bestämningen av bildandet av N0används företrädesvis en SCR-katalysatoranordning (460), vilken befinner sig i ett delflöde. (450) hos avgassystemet.(figur 5)

Claims (15)

1. Förfarande för övervakning av en metanoxidationskatalysator (320; 420) iavgassystemet hos en förbränningsmotor (300; 400), kännetecknat av att medledning av ett bildande av N02 i metanoxidationskatalysatorn (320; 420) utförs enaktivitetsdiagnos av metanoxidationskatalysatorn (320; 420), varvid utgående frånbildandet av N02 och särskilt från N02-halten och / eller N02-/N0x-förhållandet ieller efter metanoxidationskatalysatorn dras en slutsats ommetanomvandlingsförmågan hos metanoxidationskatalysatorn (320; 420), varvidutgående från ett i förekommande fall minskat bildande av N02 dras en slutsats omen försämrad metanomvandlingsförmåga hos metanoxidationskatalysatorn (320; 420).
2. Förfarande enligt krav 1, kännetecknat av att förfarandet utförs inom etttemperaturområde hos metanoxidationskatalysatorn (320; 420), inom vilket enkorrelation föreligger mellan metanomvandlingen och N02-halten och /eller N02- /N0x-förhållandet efter en metanoxidationskatalysator.
3. Förfarande enligt krav 1 eller krav 2, kännetecknat av att nedströms ommetanoxidationskatalysatorn (320; 420) är minst en SCR-katalysatoranordning (360;460) varvid bildandet av N02 bestäms anordnad, med hjälp av SCR- katalysatoranordningen (360; 460).
4. Förfarande enligt krav 3, kännetecknat av att SCR-katalysatoranordningen (360;460) är en N02-känslig SCR-katalysatoranordning vars N0x-omvandlingsförhållandeär beroende av N02-halten och / eller av N02-/N0x-förhållandet hos gasen somströmmar in i SCR-katalysatoranordningen (360; 460).
5. Förfarande enligt krav 3 eller krav 4, kännetecknat av att SCR- katalysatoranordningen (360; 460) är en hjälp-SCR-katalysatoranordning som är anordnad i ett delflöde (350; 450) hos avgassystemet. 13
6. Förfarande enligt krav 5, kännetecknat av att hjälp-katalysatoranordningen (360;460) drivs med en mindre volym än en huvud-SCR-katalysatoranordning (340; 440) ihuvudflödet (330; 430) hos avgassystemet och med en lägre temperatur än huvud-SCR-katalysatoranordningen (340; 440), särskilt med en temperatur inom ett område mellan 170°C och 250°C.
7. Förfarande enligt något av kraven 3 - 6, kännetecknat av att uppströms och /eller nedströms om SCR-katalysatoranordningen (360; 460) sker en mätning av NOx,särskilt med hjälp av NOx-sensorer (380, 390, 391; 480, 491), för bestämning avbildandet av N02.
8. Anordning för efterbehandling av avgaser för avgassystemet hos enförbränningsmotor (300, 400), innefattande minst en metanoxidationskatalysator(320, 420) i en huvudflödesledning (330; 430) hos avgassystemet, kännetecknad avatt i (350; 450) en delflödesledning hos avgassystemet är en hjälp-SCR- katalysatoranordning (360; 460) anordnad, vilken är en NOz-känslig SCR-katalysatoranordning vars NOx-omvandlingsförhållande beror av NOz-halten och /strömmar in i eller av NOz-/NOx-förhållande hos gasen som hjälp-SCR- katalysatoranordningen (360; 460).
9. Anordning för efterbehandling av avgaser enligt krav 8, kännetecknad av att förinställningen av en temperatur särskilt inom ett område mellan 170°C och 250°C ärför hjälp-SCR-katalysatoranordningen (460) ett uppvärmnings- och / eller kylmedel(451, 452) anordnat.
10. Anordning för efterbehandling av avgaser enligt krav 8 eller krav 9,kännetecknad av att delflödesledningen (350) hos avgassystemet är anordnad i enförbiledning till huvudflödesledningen (330) inom området för en huvud-SCR- katalysatoranordning (340). 14
11. Anordning för efterbehandling av avgaser enligt krav 8 eller krav 9, kännetecknad av att delflödesledningen (450) hos avgassystemet är en återföringsledning för avgaser, vilken avgrenas nedströms om metanoxidationskatalysatorn (420).
12. Användning av en anordning för efterbehandling av avgaser enligt något avkraven 8 - 11 vid ett förfarande för övervakning av en metanoxidationskatalysator (320; 420) enligt något av kraven 1 - 7.
13. Datorprogram, vilket är utfört för att utföra stegen i ett förfarande enligt något av kraven 1 - 7.
14. I\/laskinläsbart minnesmedium på vilket ett datorprogram enligt krav 13 har lagrats.
15. Elektronisk styranordning, vilken är utförd för att utföra stegen i ett förfarande enligt något av kraven 1 - 7.
SE1750309A 2016-03-30 2017-03-16 Förfarande för övervakning av en metanoxidationskatalysator samt anordning för efterbehandling av avgaser SE541544C2 (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016205170.9A DE102016205170A1 (de) 2016-03-30 2016-03-30 Verfahren zur Überwachung eines Methanoxidationskatalysators und Abgasnachbehandlungseinrichtung

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Publication Number Publication Date
SE1750309A1 true SE1750309A1 (sv) 2017-10-01
SE541544C2 SE541544C2 (sv) 2019-10-29

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SE1750309A SE541544C2 (sv) 2016-03-30 2017-03-16 Förfarande för övervakning av en metanoxidationskatalysator samt anordning för efterbehandling av avgaser

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KR (1) KR20170113357A (sv)
CN (1) CN107269368A (sv)
DE (1) DE102016205170A1 (sv)
FR (1) FR3049650B1 (sv)
SE (1) SE541544C2 (sv)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11536183B1 (en) * 2021-09-22 2022-12-27 Paccar Inc. Exhaust aftertreatment subsystem
DE102023202667B3 (de) * 2023-03-23 2024-05-29 Volkswagen Aktiengesellschaft Verfahren zur Auswertung eines NOx-Abgassensors in der Abgasanlage eines fremdgezündeten Verbrennungsmotors

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5839274A (en) * 1997-04-21 1998-11-24 Motorola, Inc. Method for monitoring the performance of a catalytic converter using post catalyst methane measurements
CA2534031C (en) * 2006-02-03 2008-06-10 Westport Research Inc. Method and apparatus for operating a methane-fuelled engine and treating exhaust gas with a methane oxidation catalyst
EP2681422B1 (fr) * 2011-03-02 2015-06-03 Peugeot Citroën Automobiles SA Procede de diagnostic d'un catalyseur d'oxydation par mesure du taux d'oxydes d'azote en aval d'un organe de reduction catalytique selective
US8839605B2 (en) * 2011-03-30 2014-09-23 GM Global Technology Operations LLC Exhaust methane control systems and methods
US20140069086A1 (en) * 2012-09-13 2014-03-13 Leon A. LaPointe Exhaust system for spark-ignited gaseous fuel internal combustion engine
US9114363B2 (en) * 2013-03-15 2015-08-25 General Electric Company Aftertreatment system for simultaneous emissions control in stationary rich burn engines

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KR20170113357A (ko) 2017-10-12
CN107269368A (zh) 2017-10-20
FR3049650A1 (fr) 2017-10-06
FR3049650B1 (fr) 2019-11-08
SE541544C2 (sv) 2019-10-29
DE102016205170A1 (de) 2017-10-05

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