There is a great interest in the use of palladium in automotive emission control catalysts because of cost and availability. On the above basis, we made a prompt effort to replace platinum by palladium in conventional platinum/rhodium systems. This paper reports the performance of aged palladium containing three-way catalysts in the laboratory.Increasing the palladium and rhodium loading from 0.5 g/1 and 0.1 g/1, respectively, to 1.0 g/1 and 0.2 g/1, respectively, resulted in improved catalyst light-off and conversion performances. The light-off performance under the dynamic conditions improved with the increasing A/F perturbation until the optimum value, and its behavior was different from platinum/rhodium catalyst. The effect of palladium on the durability performance of the palladium/rhodium catalyst was compared with that of the platinum/palladium/rhodium catalyst. Further studies were done in the characterization of catalysts and the surface enrichment of palladium-rhodium and platinum-rhodium alloy systems heated in air and hydrogen.


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    Titel :

    The Effect of Palladium on the Performance of Three-Way Catalyst


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Isogai, Akio (Autor:in) / Muraki, Hideaki (Autor:in) / Sobukawa, Hideo (Autor:in) / Kimura, Mareo (Autor:in)

    Kongress:

    International Congress & Exposition ; 1990



    Erscheinungsdatum :

    1990-02-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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