NOX ADSORBER CATALYST WITH SUPERIOR LOW TEMPERATURE PERFORMANCE

THE LEAN NOx TRAP CATALYST COMPOSITION OF THE PRESENT INVENTION COMPRISES DISTINCT LAYERS, OR ZONE CONFIGURATION OR MULTI-BRICK ARRANGEMENT. THE TOP LAYER (16), FRONT ZONE OR FRONT BRICK IS FREE OF ANY ALKALI OR ALKALINE EARTH NOx TRAPPING COMPONENTS (58, 66). THE UNDER LAYER, REAR ZONE OR REAR BRIC...

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Bibliographische Detailangaben
1. Verfasser:	WAN, CHUNG-ZONG
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES THEIR RELEVANT APPARATUS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	THE LEAN NOx TRAP CATALYST COMPOSITION OF THE PRESENT INVENTION COMPRISES DISTINCT LAYERS, OR ZONE CONFIGURATION OR MULTI-BRICK ARRANGEMENT. THE TOP LAYER (16), FRONT ZONE OR FRONT BRICK IS FREE OF ANY ALKALI OR ALKALINE EARTH NOx TRAPPING COMPONENTS (58, 66). THE UNDER LAYER, REAR ZONE OR REAR BRICK MAY CONTAIN ANY DESIRABLE NOx TRAPPING COMPONENTS (58, 66) IN CONTACT WITH A PRECIOUS METALS GROUP CATALYST (E.G., PT). CATALYSTS OF THIS INVENTION SHOW WIDE TEMPERATURE OPERATION WINDOW WITH SUPERIOR LOW TEMPERATURE PERFORMANCE. (FIG. 1)