A number of catalysts (Pt, Pd, Pd-Au and perovskites) were prepared in this study and evaluated for CO, light hydrocarbons (C2H4) and heavy hydrocarbons (C10H22) oxidation. Based on the results of this study one can conclude: The optimal DOC from a cost perspective should examine low cost active metals such as palladium and gold. In order to accurately simulate the actual diesel engine exhaust environment, both light hydrocarbons (C2H4, C3H6) and heavy hydrocarbons (such as decane) should be used for oxidation performance evaluation. Selection of DOCs based on performance with propene only should be made with caution due to the fact that this short hydrocarbon does not represent other major HC species found in the diesel exhaust environment. In addition it should be mentioned that the activation energy of ethane and propene are different due to different carbon substitution around the C=C fragment. In order to achieve the required performance, such as C2+C10 hydrocarbon conversion and CO conversion activity, the following advanced catalyst supports can be recommended - alumina-ceria, ceria-zirconia (around 1:1 composition ratios), titania as well as ceria-, cobaltand iron- containing perovskites.
New developments in diesel oxidation catalysts
Neue Entwickungen in Dieseloxidationskatalysatoren
Commercial Vehicle Emissions 2008, 2008, SAE 2008 Commercial Vehicle Congress and Exhibition, 2008 ; 21-25
2008
5 Seiten, 4 Tabellen, 23 Quellen
Aufsatz (Konferenz)
Englisch
New Developments in Diesel Oxidation Catalysts
SAE Technical Papers | 2008
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SAE Technical Papers | 2003
|New Developments in Diesel Oxidation Catalysts and Diesel Particulate Filters
British Library Conference Proceedings | 2003
|2008-01-2638 New Developments in Diesel Oxidation Catalysts
British Library Conference Proceedings | 2008
|Diagnostics for diesel oxidation catalysts
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