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    Oxidation Catalysts for Natural Gas Engine Operating under HCCI or SI Conditions

    Oxidation Catalysts for Natural Gas Engine Operating under HCCI or SI Conditions


    Oxidation catalyst performances are studied under HCCI (Homogeneous Charge Compression Ignition) and SI (Spark ignited) conditions using a model gas reactor and with natural gas fuelled HCCI and SI engines. The characteristic emissions of HCCI engines are high levels of CO and hydrocarbons, and temperatures as low as 120°C. Conventional oxidation catalysts typically light off at around 200°C, well above these temperatures. The oxidation catalyst for a HCCI engine is required to be active at low temperature, and be durable. Test results will be shown for bench-scale experiments for a series of catalyst formulations. Some catalyst formulations show excellent performance. The HCCI-tailored catalyst exhibits complete conversion of CO under HCCI engine emission conditions with various loads. Under SI conditions, high conversion efficiencies are observed for methane and non-methane hydrocarbons.

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    Title :

    Oxidation Catalysts for Natural Gas Engine Operating under HCCI or SI Conditions

    Additional title:

    Sae Int. J. Fuels Lubr
    Sae International Journal of Fuels and Lubricants

    Contributors:
    Ohtsubo, Hiroyuki (author) / Hu, Linjie (Robin) (author) / Uchida, Miwa (author) / Williams, Shazam (author) / Nakazono, Tohru (author)
    Conference:

    SAE World Congress & Exhibition ; 2008

    Published in:

    Sae International Journal of Fuels and Lubricants ; 1 , 1 ; 326-337

    Publication date :

    2008-04-14

    Size :

    12 pages

    ISSN :

    1946-3952 , 1946-3960

    DOI :

    https://doi.org/10.4271/2008-01-0807

    Type of media :

    Conference paper

    Type of material :

    Print

    Language :

    English

    Keywords :

    HCCI engines , Gas engines , Methane , Natural gas , Hydrocarbons , Exhaust emissions , Catalysts

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