What does the diesel oxidation catalyst do?
What does the diesel oxidation catalyst do?
Abstract: Diesel oxidation catalysts promote chemical oxidation of CO and HC as well as the organic fraction (OF) of diesel particulates. They also oxidize sulfur dioxide which is present in diesel exhaust from the combustion of sulfur containing fuels.
What does a diesel oxidation catalyst reduce?
Diesel Oxidation Catalysts (DOC) are catalytic converters designed specifically for diesel engines and equipment to reduce Carbon Monoxide (CO), Hydrocarbons (HC) and Particulate Matter (PM) emissions. DOC’s are simple, inexpensive, maintenance-free and suitable for all types and applications of diesel engines.
How does Cummins SCR work?
Selective Catalytic Reduction (SCR) Engines SCR spreads aqueous urea solution (AUS 32) into the exhaust stream. Ammonia from AUS32 combines with NOx in presence of catalyst to form harmless by-products like nitrogen and water vapor. Thus emitting clean gases.
Can a diesel oxidation catalyst be cleaned?
In general, cleaning requires removing the DOC from the vehicle, heating it, and using compressed air combined with a vacuum system to blow out the ash and capture it in a sealed container. Professional cleaning services are available.
How does a diesel catalytic converter work?
Every diesel system will have a Diesel Oxidation Catalyst. It is what converts the carbon monoxide into carbon dioxide and also breaks down any un-spent fuel. Functionally, this aspect of the diesel catalyst system performs just like it does in a gas cat. It is almost always the first component in the exhaust system.
Are ISX motors good?
Is The Cummins ISX A Good Engine? The engine is a workhorse but not without its issues. The Cummins ISX Engine first debuted in 2001 replacing the popular N14 Series. The Cummins N14 was a fantastic engine and beloved by diesel fans for many years.
Can you clean a SCR catalyst?
SCR catalyst systems need to be cleaned to remove contaminants and plugs. If the catalyst is not kept clean and the ammonia injection system is not tuned, ammonia slip occurs.
What is the catalyst used in SCR?
SCR catalysts are made from various porous ceramic materials used as a support, such as titanium oxide, and active catalytic components are usually either oxides of base metals (such as vanadium, molybdenum and tungsten), zeolites, or various precious metals.
How often should DPF be cleaned?
Some manufacturers recommend cleaning out the soot in the DPF every six months. However, some models can go longer without cleaning quite so frequently. Some suppliers will recommend cleaning in terms of miles, typically claiming you should do it every 200,000 miles.
How does the directdiesel oxidation catalyst work?
Diesel Oxidation Catalyst DOC catalytic material reacts above 572ºF (300ºC) in passive regeneration mode to generate Nitrogen Dioxide (NO 2 ) which oxidizes the carbon soot Diesel Particulate Filter Ceramic wall flow filter captures up to 95% of the carbon soot (PM) carried by the NO 2 This collects on the filter to form Carbon Dioxide (CO 2
Can precious metal catalysts be used to control diesel emissions?
As discussed previously, precious metal catalysts were found to successfully catalyze the conversion of pollutants in gasoline engines so their use was investigated intensely for controlling diesel emissions. In some cases, precious metals were successfully used for treating diesel liquid emissions.
Can a three-way catalyst be used in a diesel engine?
Therefore, the three-way catalyst used in the gasoline engine usually cannot be used in the diesel engine although some research was conducted on using a three-way catalyst on diesel engines to explore the potential of emissions control (e.g., Sung et al., 2009; Simescu et al., 2010 ).
What is Cummins HPCR technology?
Cummins next generation HPCR is recognized as industry leading technology Aftertreatment Technology Diesel Particulate Filters (DPF) Diesel Oxidation Filters (DOC) Selective Catalytic Reduction (SCR) Wall Flow Particulate Filter
