Reduced-emissions combustion utilizing multiple-component...

C - Chemistry – Metallurgy – 10 – L

Patent

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C10L 1/30 (2006.01)

Patent

CA 2595315

Diesel fuels containing low concentrations of specific bimetallic or trimetallic fuel-borne catalysts reduce particulates and other emissions without the use of after treatment devices, such as filters or catalysts, e.g., diesel particulate filters (DPF's) or diesel oxidation catalysts (DOCs) in the case of diesel engines. By utilizing a fuel containing a fuel-soluble catalyst comprised of platinum and at least one additional metal comprising cerium and/or iron, production of pollutants of the type generated by incomplete combustion is reduced. Preferred fuel borne catalyst levels will be low, e.g., from 0.05 to 0.5 ppm for platinum and 3 to 8 ppm for cerium and/or iron, thereby providing effective engine out emissions reductions without any aftertreatment device. Performance of lightly catalyzed aftertreatment devices will be improved with the subject invention.

L'invention concerne des carburants diesel à faibles concentrations en catalyseurs de carburant bimétalliques ou trimétalliques spécifiques de type FBC ("fuel-borne catalyst") qui réduisent le nombre de particules et d'autres émissions sans utiliser de dispositifs de post-traitement, de type filtres ou catalyseurs, par exemple filtres à particules diesel (DPF) ou catalyseurs d'oxydation diesel (DOC) pour des moteurs diesel. A l'aide d'un carburant contenant un catalyseur soluble dans le carburant constitué de platine et d'au moins un métal supplémentaire comprenant du cérium et/ou du fer, la production de substances polluantes de type générées par une combustion incomplète est réduite. Les niveaux de catalyseur FBC préférés sont faibles, par exemple, entre 0,05 et 0,5 ppm pour le platine et entre 3 et 8 ppm pour le cérium et/ou le fer, ce qui permet d'obtenir des réductions d'émissions de moteur efficaces sans utiliser de dispositifs de post-traitement. L'invention permet d'améliorer la performance de dispositifs de post-traitement légèrement catalysés.

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