NOVELTY - A catalytic process for producing hydrogen by reforming a hydrocarbon feedstock under a pressure of 40-70 bars, comprises extracting steam from a steam tank at the saturation temperature, superheating the obtained steam, introducing the superheated steam in an autothermal reforming reactor along with the hydrocarbon feedstock and pure oxygen so as to obtain a reformate, introducing the reformate into a water gas shift reactor so as to obtain a hydrogen-enriched flow, separating the hydrogen-enriched flow into a hydrogen flow and a water flow, and purifying the hydrogen flow.    USE - The method is useful for production of catalytic hydrogen by reforming a hydrocarbon feedstock for producing electricity, where the hydrogen is useful for supplying a fuel cell (all claimed), which is useful in under water vehicles and space vehicles for mining.    ADVANTAGE - The method is capable of economically, easily and energy efficiently producing the catalytic hydrogen by effectively reforming the hydrocarbon feedstock without formation of precursors, pre-combustion of the hydrocarbon charge, clogging of the reactor and risk of condensation of the synthesis gas.    DETAILED DESCRIPTION - A catalytic process for producing hydrogen by reforming a hydrocarbon feedstock under a pressure of 40-70 bars, comprises extracting steam from a steam tank at the saturation temperature, superheating the obtained steam, introducing the superheated steam in an autothermal reforming reactor along with the hydrocarbon feedstock and pure oxygen so as to obtain a reformate, introducing the reformate into a water gas shift reactor so as to obtain a hydrogen-enriched flow, separating the hydrogen-enriched flow into a hydrogen flow and a water flow, and purifying the hydrogen flow. The hydrocarbon feedstock and pure oxygen introduced into the reactor are heated at a temperature of 200-400 degrees C. The reformate is cooled in a heat exchanger installed inside the reforming reactor at 400-650 degrees C. The heat exchanger to cool the reformate is a steam generator. The steam tank and the reactor for converting carbon monoxide to water are assembled into a single device. The hydrogen-enriched flow has a temperature of 200-350 degrees C. The separation step comprises introducing the stream into a separator enriched with hydrogen from the bottom and a flow of water colder than the stream enriched in hydrogen, where the separator is filled with a contacting system such as Raschig rings or packing structure and the stream enriched in hydrogen is cooled by direct water flow. The purification is carried out in a purification unit comprising a membrane permeable to hydrogen or selective hydrogen. The retentate obtained from the purification and flow of oxygen is used to feed a catalytic burner. The heat generated by the operation of the catalytic burner is used to produce steam. The reforming reactor comprises a final section containing a monolith-type particle filter, which is coated with catalyst.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a process for producing hydrogen.    Water vapor tank (1)    Water vapor outlet pipe (2)    Heat exchanger (3)    Water vapor supply pipe (4)    Hydrocarbon supply pipe. (5)