CATALYTIC FILTER FOR REMOVING SOOT PARTICULATES FROM DIESEL ENGINE EXHAUST AND METHOD OF PREPARING THE SAME

Disclosed is a catalytic filter for removing soot particulates from diesel engine exhaust, which is comprised of monolithic oxidation catalyst upstream of the catalytic filter, which effectively oxidize gaseous pollutants and volatile organic fractions, and a catalyzed wall-flow filter downstream se...

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Bibliographische Detailangaben
Hauptverfasser:	KIM, SUNG-HYOAN, LEE, CHANG-Q, MIN, WHA-SIK, KIM, YOUNG-WOO, MIN, JOON-SEOK
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL BLASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SEPARATION SPRAYING OR ATOMISING IN GENERAL STEAM ENGINES THEIR RELEVANT APPARATUS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	Disclosed is a catalytic filter for removing soot particulates from diesel engine exhaust, which is comprised of monolithic oxidation catalyst upstream of the catalytic filter, which effectively oxidize gaseous pollutants and volatile organic fractions, and a catalyzed wall-flow filter downstream serving to low temperature combustion of soot particulates collected on the filter. Also, the preparation method of the catalytic filter is provided, including the colloidal mixture solution of platinum group metal salts and other metal salts with a water-soluble polymer and a reducing agent, which is then impregnated on a catalyst support, followed by calcining at high temperatures. In the present invention, use of the catalytic filter provides effective means of abating diesel exhaust pollutant emissions, that is, particulate matter (PM) and gaseous pollutants (HC, CO, NOx). L'invention concerne un filtre catalytique permettant d'arrêter les particules de suie présente dans l'échappement d'un moteur diesel. Ce filtre comprend un catalyseur d'oxydation monolithique en amont, qui oxyde efficacement les polluants gazeux et les fractions organique s volatiles, et un filtre catalytique à écoulement sur paroi en aval assurant la combustion à basse température des particules de suie recueillies sur le filtre. L'invention concerne également le procédé de fabrication du filtre, consistant à imprégner un support catalytique d'une solution colloïdale faite d'un mélange de sels métalliques du groupe platine et autres sels métalliques avec un polymère hydrosoluble et un agent réducteur, puis à la calciner à haute température. Le filtre catalytique de la présente invention permet de réduire effacement les rejets polluants des moteurs diesel, c'est à dire les matières particulaires (PM) et les polluants gazeux (HC, CO, NOx).