초록

The process that uses such a catalyst produces improved performance levels by avoiding the fluctuating nature of combustion and the deactivation of the catalyst.

대표청구항 ▼

[ What is claimed:] [1.] A process for the catalytic combustion of fuel with staged fuel injection that comprises: a first injection of fuel and air, the passage of the air-fuel mixture into a catalytic zone, and a second injection of fuel into the output gas from said catalytic zone, said process b

[ What is claimed:] [1.] A process for the catalytic combustion of fuel with staged fuel injection that comprises: a first injection of fuel and air, the passage of the air-fuel mixture into a catalytic zone, and a second injection of fuel into the output gas from said catalytic zone, said process being characterized in that said catalytic zone comprises at least one catalyst that comprises a monolithic substrate, a porous refractory inorganic oxide support and an active phase that comprises (I) cerium, iron, and optionally zirconium, and (II) at least one metal selected from the group consisting of palladium and platinum; the content of the porous support is between 100 and 400 g per liter of catalyst; the cerium content is between 0.3 and 20% by weight relative to the porous support; the zirconium content is between 0 and 20% by weight relative to the porous support; the iron content is between 0.01 and 3.5% by weight of iron relative to the porous support; and the palladium and/or platinum content is greater than 3 g per liter of catalyst, said process being further characterized by the presence of a monolithic element with a ceramic or metallic cellular structure, downstream from the catalytic zone, and wherein the second fuel injection is carried out between the catalytic zone and said monolithic element.