Post-mortem analyses of 50,000 mi (80,000 km) vehicle-aged catalysts revealed that the use of 0.125g Mn/gal (33 mg/L) as MMT (methyl-cyclopentadienyl manganese tricarbonyl) significantly reduces phosphorus and zinc retention levels at the catalyst inlets by ~20-fold and ~5-fold, respectively. In subsequent laboratory pulsator experiments the presence of 0.016 to 0.157g Mn (as MMT)/gal (4 to 41 mg/L) isooctane fuel containing a 10-fold excess of ZDP (zinc dialkyldithiophosphate, source of oil P and Zn) similarly reduced the retention of P and Zn on TWCs by proportional amounts, while the TWCs maintained significantly higher 3-way conversions than in the absence of MMT. The combustion of Mn from MMT to very stable Mn3O4 probably serves as a scavenger in the exhaust for transporting away fuel- and oil-derived catalyst poisons such as P, Zn, and Pb. The utility of the laboratory results will require verification in vehicle studies.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Effects of Fuel Additive MMT on Contaminant Retention and Catalyst Performance


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Weaver, E. E. (Autor:in) / Gandhi, H. S. (Autor:in) / Williamson, W. B. (Autor:in)

    Kongress:

    1982 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1982



    Erscheinungsdatum :

    01.02.1982




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Effects of fuel additive MMT on contaiminant retention and catalyst performance

    Williamson,W.B. / Gandhi,H.S. / Weaver,E.E. et al. | Kraftfahrwesen | 1982


    Interaction between fuel additive and oil contaminant: (I) field experience

    Stehouwer,D.M. / Fang,H.L. / Wooton,D. et al. | Kraftfahrwesen | 2003


    Interaction Between Fuel Additive and Oil Contaminant: (I) Field Experiences

    Wooton, David / Stehouwer, David M. / Martin, Harold et al. | SAE Technical Papers | 2003


    Fuel tank contaminant prediction

    LAM JOSEPH K-W / TICHBORNE FRANKLIN / MASTERS SIMON et al. | Europäisches Patentamt | 2016

    Freier Zugriff