CATALYST FOR THE REDUCING OF THE EMISSIONS OF NITROGEN OXIDES FROM THE EXHAUST GASES OF THE INTERNAL COMBUSTION ENGINES

The invention relates to a catalyst for decreasing nitrogen oxide in the lean exhaust gas of automobile engines. On a structurally reinforcing body, it contains a first catalytic coating of a high surface area aluminium oxide and/or cerium oxide impregnated with a mixture of iridium and platinum as...

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Bibliographische Detailangaben
Hauptverfasser:	EGBERT LOX, JURGEN LEYRER, BERND ENGLER
Format:	Patent
Sprache:	eng ; rum
Schlagworte:	BLASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION THEIR RELEVANT APPARATUS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to a catalyst for decreasing nitrogen oxide in the lean exhaust gas of automobile engines. On a structurally reinforcing body, it contains a first catalytic coating of a high surface area aluminium oxide and/or cerium oxide impregnated with a mixture of iridium and platinum as catalytically active noble metal components. On the first layer is applied a second catalytic coating of a zeolite which contains copper and/or iron and is of the mordenite type.