Catalysts for treating transient NOX emissions

The invention relates to catalysts for treating transient NOX emissions. A heterogeneous catalyst article having at least one combination of a first molecular sieve having a medium pore, large pore, or meso-pore crystal structure and optionally containing a first metal, and a second molecular sieve...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	PHILLIPS PAUL RICHARD, CHANDLER GUY RICHARD, REID STUART DAVID, GREEN ALEXANDER NICHOLAS MICHAEL, MELVILLE JOANNE ELIZABETH
Format:	Patent
Sprache:	eng
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 invention relates to catalysts for treating transient NOX emissions. A heterogeneous catalyst article having at least one combination of a first molecular sieve having a medium pore, large pore, or meso-pore crystal structure and optionally containing a first metal, and a second molecular sieve having a small pore crystal structure and optionally containing a second metal, and a monolith substrate onto or within which said catalytic component is incorporated, wherein the combination of the first and second molecular sieves is a blend, a plurality of layers, and/or a plurality of zones.