Pollution control catalyst for internal combustion engine exhaust system/catalytic converter
AssigneeProcatalyse
InventorsJean-Pierre Brunelle, Philippe Courty, Michel Prigent, Bernard Raynal
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Abstract
A pollution control catalyst for a catalytic converter comprising the exhaust system of an internal combustion engine, said catalyst including a refractory oxide support, and an activated phase therefor comprised of 0.3 to 7% by weight cerium based upon the weight of said support, 0.1 to 3.5% by weight iron, also based upon the weight of said support, at least one platinum or palladium metal, and at least one iridium or rhodium metal.
Claims20
A catalyst composition for the conversion of carbon monoxide, hydrocarbons, and nitrogen oxides comprising a refractory oxide support, and an activated phase deposited on said support consisting essentially of 0.3 to 7% by weight cerium based upon the weight of said support, 0.1 to 3.5% by weight iron, also based upon the weight of said support, at least one platinum or palladium metal, and at least one iridium or rhodium metal, the ratio of the at least one platinum or palladium metal to the at least one iridium or rhodium metal being between about 5:1 and about 250:1.
A catalyst composition for the conversion of carbon monoxide, hydrocarbons, and nitrogen oxides comprising a refractory oxide support, and an activated phase deposited on said support consisting essentially of 0.3 to 7% by weight cerium based upon the weight of said support, 0.1 to 3.5% by weight iron, also based upon the weight of said support, at least one platinum or palladium metal, and at least one iridium metal.
Dependencies are inferred from the claim text.