To develop catalysts for natural gas vehicles the effects of precious metal, washcoat and catalysts combination on the removal of methane (CH4), non methane hydrocarbon (NMHC), CO and NOx were investigated. The precious metal formula studied were Pt/Rh, Pd/Rh, Pt/Pd/Rh (trimetal) and Pd only. Two types of washcoats with different compositions and coating structures were used. Model gas tests were carried out for eight kinds of catalysts and dual catalysts consisted of two single catalysts. Through FTP75 vehicle test, three 50,000 miles approximate aged catalytic converters with dual beds were evaluated.The experimental results showed that Pd only and trimetal catalysts had good catalytic performance over the CH4-CO-NO simulated gas composition. Dual bed catalysts had better CH4, CO and NO conversion performance and light off characteristics than single bed catalysts. From the vehicle tests, NOx emission levels were far below ULEV standard regardless of catalytic converter, but only the converter with Pd front and Pt/Rh rear bed cleared the ULEV standards of NMOG (non methane organic gases), CO and NOx simultaneously.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Catalyst Technology Satisfying Low Emission of Natural Gas Vehicle


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Kim, Chang-Dae (Autor:in) / In, Chi-Bum (Autor:in) / Kim, Sang-Ho (Autor:in) / Cho, Won-Suk (Autor:in)

    Kongress:

    International Congress & Exposition ; 1997



    Erscheinungsdatum :

    24.02.1997




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Catalyst Technology Satisfying Low Emission of Natural Gas Vehicle

    In, C.-B. / Kim, S.-H. / Kim, C.-D. et al. | British Library Conference Proceedings | 1997


    Catalyst technology satisfying low emission of natural gas vehicle

    In,C.B. / Kim,S.H. / Kim,C.D. et al. | Kraftfahrwesen | 1997




    SYSTEM AND METHOD TO FACILITATE SATISFYING LOW EMISSION ZONE REQUIREMENTS

    JONES MATT | Europäisches Patentamt | 2018

    Freier Zugriff