MULTI-LAYER NITROGEN OXIDE STORAGE CATALYST WITH MANGANESE

MULTI-LAYER NITROGEN OXIDE STORAGE CATALYST WITH MANGANESE

The Invention relates to a nitrogen oxide storage catalyst composed of at least two catalytically-active washcoat layers on a support body, wherein a lower washcoat layer A comprises cerium oxide, an alkaline earth metal compound and/or an alkali compound, platinum and palladium, and manganese oxide...

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Hauptverfasser: MUELLER, Elena, HOYER, Ruediger, UTSCHIG, Thomas
Format: Patent
Sprache:eng ; fre ; ger
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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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creator MUELLER, Elena
HOYER, Ruediger
UTSCHIG, Thomas
description The Invention relates to a nitrogen oxide storage catalyst composed of at least two catalytically-active washcoat layers on a support body, wherein a lower washcoat layer A comprises cerium oxide, an alkaline earth metal compound and/or an alkali compound, platinum and palladium, and manganese oxide, and an upper washcoat layer B disposed on the washcoat layer A comprises cerium oxide, platinum and palladium and does not contain any alkali and alkaline-earth compounds, and to a method for converting NOx in exhaust gases from motor vehicles which are operated with lean-burn engines.
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subjects CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
THEIR RELEVANT APPARATUS
TRANSPORTING
title MULTI-LAYER NITROGEN OXIDE STORAGE CATALYST WITH MANGANESE
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