On vehicles equipped with fuel shut-off, the rhodium in conventional TWC catalyst tends to strongly interact with the washcoat components during the high temperature lean excursions seen during deceleration. Studies were conducted to elucidate the conditions under which rhodium interacts with the alumina washcoat support and the rare earth components used in some of the new “High Tech” catalyst compositions. Technology was developed which decreased the rhodium interaction with these washcoat components which permits the catalyst to operate under a much broader set of engine control conditions.Laboratory hydrothermal and engine dynamometer aging studies were used to demonstrate the feasibility of lowering precious metal usage and especially rhodium content of TWC catalysts without sacrificing “High Tech” performance. It is anticipated that this technology will result in lower rhodium TWC catalysts and provide durable catalysts for engine control strategies featuring fuel shut-off or lean A/F ratio calibraiton.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Effective Rhodium Utilization in Automotive Exhaust Catalysts


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Wan, C. Z. (Autor:in) / Dettling, J. C. (Autor:in)

    Kongress:

    SAE International Congress and Exposition ; 1986



    Erscheinungsdatum :

    1986-03-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Effective rhodium utilization in automotive exhaust catalysts

    Wan,C.J. / Dettling,J.C. / Engelhard,US | Kraftfahrwesen | 1986


    Advanced Platinum-Rhodium Exhaust Catalysts-An Economic Alternative to Palladium-Rhodium

    Brisley, R. J. / Collins, N. R. / French, A. C. et al. | British Library Conference Proceedings | 2000


    Advanced Platinum-Rhodium Exhaust Catalysts - An Economic Alternative To Palladium-Rhodium

    French, A. C. / Morris, D. / Twigg, M. V. et al. | SAE Technical Papers | 2000


    Numerical Modeling of Automotive Exhaust Catalysts

    Okubo, Hirosuke / Kato, Masayuki / Otsuka, Shinichiro et al. | SAE Technical Papers | 2011


    Numerical modeling of automotive exhaust catalysts

    Kato,M. / Matsummoto,T. / Otsuka,S. et al. | Kraftfahrwesen | 2011