| 摘要 |
The invention relates to a multilayer catalyst for the partial oxidation of hydrocarbons in gaseous phase, comprising a monolithic ceramic or metallic substrate having a solid macroporous structure consisting of one or more structures, on which a first active layer with a crystal-line perovskitic structure is deposited, having general formula AxA′ 1-xByB′ 1-YO3±δ wherein: A is a cation of at least one of the rare earth elements, A′ is a cation of at least one element selected from groups Ia, IIa and VIa of the periodic table of elements, B is a cation of at least one element selected from groups IVb, Vb, VIb, VIIb, or VIII of the periodic table of elements, B′ is a cation of at least one element selected from groups IVb, Vb, VIb, VIIb or VIII of the periodic table of elements Mg2+ or Al3+, x is a number which is such that 0≦̸x≦̸1, y is a number which is such that 0≦̸y≦̸1, and δ is a number which is such that 0≦̸δ≦̸0, 5, a second more external active layer consisting of a dispersion of a noble metal and a possible supporting layer with a large surface area, positioned between said monolithic substrate and said first active layer with a perovskitic structure. The invention also relates to a process for the production of said catalyst and its use for the partial oxidation of hydrocarbons in gaseous phase. |
