LOW TEMPERATURE SELECTIVE CATALYTIC REDUCTION CATALYST AND ASSOCIATED SYSTEMS AND METHODS

According to one embodiment, described herein is an exhaust gas after-treatment system (120) that is coupleable in exhaust gas stream receiving communication with an internal combustion engine (110). The exhaust gas after-treatment system includes a low temperature SCR catalyst (165) configured to r...

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Bibliographische Detailangaben
Hauptverfasser:	HENRICHSEN, MATTHEW, ETTIREDDY, PADMANABHA REDDY
Format:	Patent
Sprache:	eng ; fre
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:	According to one embodiment, described herein is an exhaust gas after-treatment system (120) that is coupleable in exhaust gas stream receiving communication with an internal combustion engine (110). The exhaust gas after-treatment system includes a low temperature SCR catalyst (165) configured to reduce NOx in exhaust gas having a temperature below a temperature threshold. The system also includes a normal-to-high temperature SCR catalyst (170) configured to reduce NOx in exhaust gas having a temperature above the temperature threshold. Selon un mode de réalisation, l'invention concerne un système de post traitement des gaz d'échappement (120) qui est en mesure d'être accouplé, de manière à recevoir un flux de gaz d'échappement, avec un moteur à combustion interne (110). Le système de post traitement des gaz d'échappement comprend un catalyseur SCR basse température (165) configuré pour réduire l'oxyde d'azote NOx dans les gaz d'échappement ayant une température inférieure à un seuil de température. Le système comprend également un catalyseur SCR température normale à élevée (170) configuré pour réduire l'oxyde d'azote NOx dans les gaz d'échappement ayant une température supérieure au seuil de température.