An in depth analysis of the pelleted automotive catalysts from the 1975 General Motors Certification Fleet led to the development of a useful catalyst poisoning model. By optimizing three variables: pore volume and pore size distribution, precious metals penetration, and surface area, it was possible to design a more poison resistant catalyst. The application of these ideas resulted in a second generation of catalysts, introduced in 1978, which were characterized by better performance and greater durability.In order to meet 1980 and 1981 emissions requirements, further improvements were required. To achieve this, two different variables were studied: geometric surface area and noble metal ratios. From the optimization of these added variables there evolved several new catalysts which, after extensive engine dynamometer and vehicle testing, were selected for use on General Motors vehicles.


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    Titel :

    Improved Pelleted Catalyst Substrates for Automotive Emissions Control


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    1980 Automotive Engineering Congress and Exposition ; 1980



    Erscheinungsdatum :

    01.02.1980




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Improved pelleted catalyst substrates for automotive emission control

    Adomaitis,J.R. / Smith,J.E. / Achey,D.E. et al. | Kraftfahrwesen | 1980


    AGING OF PELLETED AND MONOLITHIC AUTOMOTIVE EMISSION CONTROL CATALYSTS

    Thompson, C.E. / Summers, J.C. | SAE Technical Papers | 1980


    Phosphorus and Lead Poisoning of Pelleted Three-Way Catalysts

    Monroe, David R. | SAE Technical Papers | 1980


    Automotive Emissions Control Technology

    J. Bernard / S. Kaufman / R. Dulla et al. | NTIS | 1980


    Impact of Catalyst Support Design Parameters on Automotive Emissions

    Day, J. Paul / Socha, Louis S. | SAE Technical Papers | 1988