COMBINATION OF NOx ABSORBER AND SCR CATALYST

To provide a catalyst article for performing efficient NOx conversion in combination with an SCR catalyst, and a method for treating a flow of an exhaust gas using the article.SOLUTION: A catalyst article includes a base material both a selective catalytic reduction (SCR) catalyst composition and a...

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Bibliographische Detailangaben
Hauptverfasser:	JOSEPH A PATCHETT, WEI XINYI
Format:	Patent
Sprache:	eng ; jpn
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:	To provide a catalyst article for performing efficient NOx conversion in combination with an SCR catalyst, and a method for treating a flow of an exhaust gas using the article.SOLUTION: A catalyst article includes a base material both a selective catalytic reduction (SCR) catalyst composition and a nitrogen oxide (NOx) absorber composition arranged thereon, wherein the NOx absorber composition contains an alkali earth metal component, and the SCR catalyst composition contains a mixed metal oxide component selected from a group consisting of FeTiO3, FeAl2O3, MgTiO3, MgAlO3, MnOX/TiO2, CuTiO3, CeZrO2, TiZrO2, V2O5/TiO2 and mixtures thereof.SELECTED DRAWING: Figure 1 【課題】ＳＣＲ触媒と組み合わせた効率の良いＮＯｘ変換を行うための触媒物品、および該物品を用いた排気ガスの流れを処理するための方法を提供する。【解決手段】選択的触媒還元（ＳＣＲ）触媒組成物およびその上に配設された窒素酸化物（ＮＯｘ）吸収体組成物の両方を有する基材を備え、前記ＮＯｘ吸収体組成物が、アルカリ土類金属成分を含み、そして、前記ＳＣＲ触媒組成物が、ＦｅＴｉＯ３、ＦｅＡｌ２Ｏ３、ＭｇＴｉＯ３、ＭｇＡｌＯ３、ＭｎＯＸ／ＴｉＯ２、ＣｕＴｉＯ３、ＣｅＺｒＯ２、ＴｉＺｒＯ２、Ｖ２Ｏ５／ＴｉＯ２、およびそれらの混合物からなる群から選択される混合金属酸化物成分を含む、触媒物品とする。【選択図】図１