METHOD FOR REDUCING QUANTITY OF NITROGEN OXIDES IN EXHAUST GAS OF VEHICLE 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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Bibliographic Details
Main Authors ENGLER,BERND, LOX,EGBERT, LEYRER,JUERGEN
Format Patent
LanguageEnglish
Published 28.11.1994
Edition5
Subjects
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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Summary: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.
Bibliography:Application Number: HU19930000582