Abstract: The catalytic system comprising a nucleus containing a supported hydrotreatment, hydrogenation and/or cracking catalyst or a carrier selected from an amorphous silico-aluminate, a crystalline silico-aluminate and/or an alumina characterized in that the surface of said nucleus is partially or totally covered by a layer of molybdenite. The relative preparation process can be carried out starting from the nucleus containing the supported catalyst or carrier, depositing, on the surface of said nucleus, a molybdenite either preformed or generated in situ following the addition of an oil-soluble precursor of molybdenum so as to partially or totally cover it with a layer of molybdenite.

Abstract: Integrated process for the production of biofuels from solid urban waste which comprises: subjecting said waste to liquefaction obtaining a mixture comprising an oily phase consisting of bio-oil, a solid phase and an aqueous phase; subjecting the mixture obtained from said liquefaction to separation obtaining an oily phase consisting of bio-oil, a solid phase and an aqueous phase; subjecting the oily phase consisting of bio-oil, obtained from said separation to hydroconversion in slurry phase, in the presence of at least one nanodispersed hydrogenation catalyst; wherein said liquefaction is carried out at a temperature ranging from 150° C. to 350° C., preferably ranging from 200° C. to 320° C., at a pressure ranging from 5 bar to 170 bar, preferably ranging from 15 to 115 bar and for a time ranging from 5 minutes to 240 minutes, preferably ranging from 15 to 90 minutes. The biofuels thus obtained can be used as such, or in a mixture with other fuels, for automotive.