An Exhaust Gas Aftertreatment System to Reduce Particulates for Full-Size Passenger Cars

1988 ◽  
Author(s):  
Gerhard Lepperhoff ◽  
Jan Widdershoven ◽  
Georg Lütkemeyer ◽  
Ivan Hedin
Keyword(s):  
Exhaust Gas ◽  
Passenger Cars ◽  
Full Size ◽  
Aftertreatment System ◽  
Exhaust Gas Aftertreatment

scholarly journals Lean-Burn Natural Gas Engines: Challenges and Concepts for an Efficient Exhaust Gas Aftertreatment System

2020 ◽  
Author(s):  
Patrick Lott ◽  
Olaf Deutschmann
Keyword(s):  
Natural Gas ◽  
Carbon Dioxide Emissions ◽  
Rational Design ◽  
Catalytic Converter ◽  
Pollutant Emissions ◽  
Exhaust Gas ◽  
Lean Burn ◽  
Aftertreatment System ◽  
Natural Gas Engines ◽  
Exhaust Gas Aftertreatment

AbstractHigh engine efficiency, comparably low pollutant emissions, and advantageous carbon dioxide emissions make lean-burn natural gas engines an attractive alternative compared to conventional diesel or gasoline engines. However, incomplete combustion in natural gas engines results in emission of small amounts of methane, which has a strong global warming potential and consequently makes an efficient exhaust gas aftertreatment system imperative. Palladium-based catalysts are considered as most effective in low temperature methane conversion, but they suffer from inhibition by the combustion product water and from poisoning by sulfur species that are typically present in the gas stream. Rational design of the catalytic converter combined with recent advances in catalyst operation and process control, particularly short rich periods for catalyst regeneration, allow optimism that these hurdles can be overcome. The availability of a durable and highly efficient exhaust gas aftertreatment system can promote the widespread use of lean-burn natural gas engines, which could be a key step towards reducing mankind’s carbon footprint.

Challenges for the Future Diesel Engines Exhaust Gas Aftertreatment System

2007 ◽  
Author(s):  
Paul C. Spurk ◽  
Marcus Pfeifer ◽  
Frank-Walter Schütze ◽  
Thomas Kreuzer
Keyword(s):  
Diesel Engines ◽  
Exhaust Gas ◽  
Aftertreatment System ◽  
Exhaust Gas Aftertreatment ◽  
The Future

scholarly journals Dynamics of a Combined DOC−NSRC−SCR Exhaust Gas Aftertreatment System with Periodic Regenerations

2010 ◽  
Vol 49 (21) ◽  
pp. 10348-10357 ◽  
Author(s):  
František Plát ◽  
Šárka Bártová ◽  
Jan Štěpánek ◽  
Petr Kočí ◽  
Miloš Marek
Keyword(s):  
Exhaust Gas ◽  
Aftertreatment System ◽  
Exhaust Gas Aftertreatment

Modelling of NOx Storage + SCR Exhaust Gas Aftertreatment System with Internal Generation of Ammonia

2010 ◽  
Vol 3 (1) ◽  
pp. 500-522 ◽  
Author(s):  
Daniel Chatterjee ◽  
Petr Koci ◽  
Volker Schmeisser ◽  
Milos Marek ◽  
Michel Weibel
Keyword(s):  
Nox Storage ◽  
Exhaust Gas ◽  
Aftertreatment System ◽  
Exhaust Gas Aftertreatment ◽  
Internal Generation

Exhaust gas aftertreatment system for Euro 4 heavy-duty engines

MTZ worldwide ◽  
2005 ◽  
Vol 66 (6) ◽  
pp. 9-11 ◽  
Author(s):  
Eberhard Jacob ◽  
Reinhard Lämmermann ◽  
Andreas Pappenheimer ◽  
Dieter Rothe
Keyword(s):  
Exhaust Gas ◽  
Heavy Duty ◽  
Aftertreatment System ◽  
Exhaust Gas Aftertreatment

scholarly journals Concepts for Hydrogen Internal Combustion Engines and Their Implications on the Exhaust Gas Aftertreatment System

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 8166
Author(s):  
Stefan Sterlepper ◽  
Marcus Fischer ◽  
Johannes Claßen ◽  
Verena Huth ◽  
Stefan Pischinger
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engines ◽  
State Of The Art ◽  
Internal Combustion ◽  
Specific Power ◽  
Exhaust Gas ◽  
Combustion Engines ◽  
Engine Operation ◽  
Aftertreatment System ◽  
Exhaust Gas Aftertreatment

Hydrogen as carbon-free fuel is a very promising candidate for climate-neutral internal combustion engine operation. In comparison to other renewable fuels, hydrogen does obviously not produce CO2 emissions. In this work, two concepts of hydrogen internal combustion engines (H2-ICEs) are investigated experimentally. One approach is the modification of a state-of-the-art gasoline passenger car engine using hydrogen direct injection. It targets gasoline-like specific power output by mixture enrichment down to stoichiometric operation. Another approach is to use a heavy-duty diesel engine equipped with spark ignition and hydrogen port fuel injection. Here, a diesel-like indicated efficiency is targeted through constant lean-burn operation. The measurement results show that both approaches are applicable. For the gasoline engine-based concept, stoichiometric operation requires a three-way catalyst or a three-way NOX storage catalyst as the primary exhaust gas aftertreatment system. For the diesel engine-based concept, state-of-the-art selective catalytic reduction (SCR) catalysts can be used to reduce the NOx emissions, provided the engine calibration ensures sufficient exhaust gas temperature levels. In conclusion, while H2-ICEs present new challenges for the development of the exhaust gas aftertreatment systems, they are capable to realize zero-impact tailpipe emission operation.

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