LTA catalysts having extra-framework iron and/or manganese for treating exhaust gas

LTA catalysts having extra-framework iron and/or manganese for treating exhaust gas

Provided is a catalyst composition comprising a zeolite having an LTA structure with iron, manganese or a combination thereof as an extra- framework metal. The zeolite has a mole ratio of silica-to-alumina (SAR) of 15 to 70 and can contain 0.5 to 10 weight percent, based on the total weight of the z...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: Joseph Fedeyko
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:Provided is a catalyst composition comprising a zeolite having an LTA structure with iron, manganese or a combination thereof as an extra- framework metal. The zeolite has a mole ratio of silica-to-alumina (SAR) of 15 to 70 and can contain 0.5 to 10 weight percent, based on the total weight of the zeolite, of iron, manganese or a combination thereof. Provided is also a catalytic article comprising the catalyst composition and a substrate, and a system for treating exhaust gas comprising the catalytic article, as well as a method for treating exhaust gas. The catalyst composition provides improved catalytic performance in selective catalytic reduction of NOx.