Catalyst for lowering the amount of nitrogen oxides in the exhaust gas from lean burn engines

The invention relates to a catalyst for lowering the amount of NO X in the lean exhaust gas from lean burn engines comprising aluminum oxide, magnesium oxide and at least one noble metal of the platinum group of the periodic table of the elements, as well as at least one nitrogen oxides storage mate...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	JULIANE THEIS, ULRICH GOEBEL, RAINER DOMESLE, LUTZ MARC RUWISCH
Format:	Patent
Sprache:	eng
Schlagworte:	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 LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES THEIR RELEVANT APPARATUS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to a catalyst for lowering the amount of NO X in the lean exhaust gas from lean burn engines comprising aluminum oxide, magnesium oxide and at least one noble metal of the platinum group of the periodic table of the elements, as well as at least one nitrogen oxides storage material. In the catalyst the magnesium oxide forms a homogeneous mixed oxide with the aluminum oxide and is present in a concentration of 1 to 40 wt.-%, based on the total weight of the mixed oxide.