초록 ▼

Processes for the catalytic combustion of hydrocarbons, carbon monoxide, hydrogen, or mixtures thereof (processes with one or more catalytic stages) and processes of abating the pollution produced by the exhaust gases of vehicles that run on natural gas using a non-selective oxidation catalyst. The

Processes for the catalytic combustion of hydrocarbons, carbon monoxide, hydrogen, or mixtures thereof (processes with one or more catalytic stages) and processes of abating the pollution produced by the exhaust gases of vehicles that run on natural gas using a non-selective oxidation catalyst. The non-selective oxidation catalyst comprises a monolithic substrate, a porous support with a refractory inorganic oxide base and an active phase that consists of cerium, zirconium, iron, and at least one metal that is selected from the group that is formed by palladium and platinum is described; with the porous support content being between 200 and 400 g per liter of catalyst; with the cerium content being between 0.3 and 20% by weight relative to the porous support; with the zirconium content being between 0.3 and 20% by weight relative to the porous support; with the iron content being between 0.01 and 3.5% of iron by weight relative to the porous support; and with the palladium and/or platinum content being higher than 3 g per liter of catalyst.

대표청구항 ▼

[ We claim:] [1.] A process for catalytic combustion of a fuel comprising hydrocarbons, carbon monoxide, hydrogen or mixtures thereof which process comprises combusting the fuel in the presence of a non-selective oxidation catalyst that comprises a monolithic substrate, a porous support comprising a

[ We claim:] [1.] A process for catalytic combustion of a fuel comprising hydrocarbons, carbon monoxide, hydrogen or mixtures thereof which process comprises combusting the fuel in the presence of a non-selective oxidation catalyst that comprises a monolithic substrate, a porous support comprising a refractory inorganic oxide and an active phase impregnated therein which comprises oxides of cerium, zirconium and iron and at least one metal selected from the group consisting of palladium and platinum, with the porous support content being from greater than 200 to 400 g per liter of catalyst; with the cerium content being between 0.3% and 20% by weight relative to the porous support; with the zirconium content being between 0.3 % and 20% by weight relative to the porous support; with the iron content being between 0.01 and 3.5% by weight relative to the porous support; and with the palladium and/or platinum content being from 3 g to 20 g per liter of catalyst.