catalisador de paládio-ródio de camada única

The three-way catalyst comprises a catalytically active coating on an inert catalytic support of ceramic or metal. An active aluminum oxide and two cerium-zirconium mixed oxides are provided in the three-way catalyst. The former cerium-zirconium mixed oxide has higher zirconium content than the latt...

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Bibliographische Detailangaben
Hauptverfasser:	Martin Roesch, Dieter Lindner, Joerg-Michael Richter, Raoul Klingmann
Format:	Patent
Sprache:	por
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The three-way catalyst comprises a catalytically active coating on an inert catalytic support of ceramic or metal. An active aluminum oxide and two cerium-zirconium mixed oxides are provided in the three-way catalyst. The former cerium-zirconium mixed oxide has higher zirconium content than the latter mixed oxide. The former cerium-zirconium mixed oxide is catalytically activated by rhodium and the latter mixed oxide is catalytically activated by palladium. The alumina and the cerium-zirconium mixed oxides are additionally coated with strontium oxide or barium oxide on their surface.