LOW TEMPERATURE HYDROCARBON SCR

PROBLEM TO BE SOLVED: To provide a method of reducing nitrogen oxides (NO) in a flowing combustion exhaust gas to Nunder relatively cool exhaust gas conditions.SOLUTION: The method comprises oxidizing nitrogen monoxide to nitrogen dioxide with a transition metal/zeolite catalyst at catalyst bed temp...

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Bibliographische Detailangaben
Hauptverfasser:	JILLIAN ELAINE COLLIER, ISABEL ZOE TINGAY, PAUL JAMES MILLINGTON, BLAKEMAN PHILIP GERALD, WALKER ANDREW PETER, RAJARAM RAJ RAO
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR RELEVANT APPARATUS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method of reducing nitrogen oxides (NO) in a flowing combustion exhaust gas to Nunder relatively cool exhaust gas conditions.SOLUTION: The method comprises oxidizing nitrogen monoxide to nitrogen dioxide with a transition metal/zeolite catalyst at catalyst bed temperatures below 50°C, and reducing NOwith the catalyst using a hydrocarbon (HC) reductant at catalyst bed temperatures below 150°C. The transition metal is selected from the group consisting of cobalt, manganese, cerium, copper, iron, chromium and mixtures of any two or more thereof.