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Investigations on Chemical Ageing of Diesel Oxidation Catalysts and Coated Diesel Particulate Filters Daimler AG
- Format:
- Conference/Event
- Author/Creator:
- Lanzerath, Lanzerath, author.
- Conference Name:
- SAE 2010 World Congress & Exhibition (2010-04-13 : Detroit, Michigan, United States)
- Language:
- English
- Physical Description:
- 1 online resource
- Place of Publication:
- Warrendale, PA SAE International 2010
- Summary:
- For medium- and heavy-duty diesel engines, the development ofnew catalyst technologies and particulate filters is necessary tofulfill increasingly stringent emission regulations. An importantaspect is the durability of the after-treatment system andtherefore its efficiency over lifetime. Lubrication oil additivescontain components such as phosphorous or zinc to ensure enginedurability. Diesel oxidation catalyst (DOC) and coated dieselparticulate filter (cDPF) catalytic coatings are negativelyinfluenced by contamination on the surface with these components(chemical ageing). The components have a negative impact on theexhaust after-treatment systems performance. Additionally the cDPFis filled with oil ash.Engine tests are conducted to analyze the effect of lubricationoil additives on after-treatment system performance. In one study,lubrication oil with increased sulfur ash content is used. Inanother study, the same liquid oil is additionally sprayed directlyinto the after-treatment system. The performance of bothafter-treatment systems is measured at regular intervals duringtesting. The results show that the NO₂ make on DOC and cDPFdeteriorates severely due to chemical and thermal ageing. Howeverwith increased operation time, the effects stabilize. In additionto the test bench investigations, the accumulation of poisoningelements on the washcoat surface is analyzed using XRF analysis.Ash accumulation in the cDPF is studied and ash composition isanalyzed. Selected results of this study are compared to results ofmeasurements on durability run aged after-treatment systems fromEPA-07 development
- Notes:
- Vendor supplied data
- Publisher Number:
- 2010-01-1212
- Access Restriction:
- Restricted for use by site license
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