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.


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    Title :

    New developments in diesel oxidation catalysts


    Additional title:

    Neue Entwickungen in Dieseloxidationskatalysatoren


    Contributors:


    Publication date :

    2008


    Size :

    5 Seiten, 4 Tabellen, 23 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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