Catalyzed particulate oxidizer for reducing particulate...

B - Operations – Transporting – 01 – D

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B01D 53/56 (2006.01) B01D 53/92 (2006.01) B01D 53/94 (2006.01) F01N 3/02 (2006.01) F01N 3/029 (2006.01) F01N 3/035 (2006.01) F01N 3/08 (2006.01)

Patent

CA 2349846

Operation of a diesel engine with low particulate emissions is achieved through the use of a catalyzed particulate oxidizer (14) designed to cause a large number of impacts of particulates with catalyzed surfaces. The catalyzed particulate oxidizer (14) can be precatalyzed or uncatalyzed initially, but catalyzed during use by a catalyst fed prior to or after combustion in the engine. Preferably, the fuel will contain a catalytic additive (29), such as diphenyl cyclooctadiene platinum (II) or platinum acetylacetonate and/or a fuel soluble organo-metallic compound of cerium, iron, copper or manganese. Alternatively, the platinum group metal or other catalytic compound can be added to the exhaust or combustion air. The catalyzed particulate oxidizer has a plurality of parallel plates having catalyzed undulating surfaces provided to create a large number of contact points for the particulates in the exhaust gas.

L'exploitation d'un moteur diesel à faible taux d'émissions particulaires s'effectue au moyen d'un comburant particulaire catalysé (14) mis au point pour provoquer un grand nombre de chocs de particules avec des surfaces catalysées. Le comburant particulaire catalysé (14) peut être précatalysé ou non catalysé au départ, mais catalysé pendant l'utilisation par un catalyseur alimenté avant ou après combustion dans le moteur. De préférence, le carburant contient un additif catalytique (29), tel qu'un platine de diphényl-cyclooctadiène (II) ou un platine d'acétylacétonate et/ou un composé organo-métallique de cérium, de fer, de cuivre ou de manganèse soluble dans du carburant. Dans une forme de réalisation substitutive, le métal du groupe du platine ou un autre composé catalytique peut être ajouté à l'air extrait ou comburant. Le comburant particulaire catalysé comprend plusieurs plaques parallèles présentant des surfaces ondulantes catalysées destinées à créer un grand nombre de points de contact pour les particules présentes dans le gaz d'échappement.

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