NOVELTY - Producing hydrogen from reagents involves pre-heating section (200) of reagents, at 100-500 degrees C, catalytic partial oxidation section (101) with low contact time, where reagents react with oxidant including oxygen, air/air enriched in oxygen, to provide synthesis gas, heat recovery section (201), including boiler which generates steam thus cooling synthesis gas produced, conversion section (102) of carbon monoxide contained in synthesis gas to carbon dioxide by water gas shift reaction, section (104) for removal of carbon dioxide contained in stream produced water gas shift section.    USE - For production of hydrogen starting from reagents comprising liquid hydrocarbons, gaseous hydrocarbons, and/or oxygenated compounds (claimed); used as fuel.    ADVANTAGE - The method is more efficient and less costly. The method reduces emissions such as nitrogen oxides, carbon monoxide and particulates, as the preheating of the feedstocks can preferably be effected with the steam produced by the cooling of the synthesis gas leaving the short contact time catalytic partial oxidation (SCT-CPO) reactor. The process integration between the hydrodesulphuration section, SCT-CPO, water gas shift (WGS) reaction, carbon dioxide (CO2) removal and separation/purification section of hydrogen produced (PSA) can also be formulated so as to not cause any emission of CO2 in diluted streams different from that obtained from the removal unit. The SR technology, on the contrary, does not allow a process scheme to be formulated in which an overproduction of steam or emission of CO2 in the fumes of the preheating and SR ovens, can be avoided.    DETAILED DESCRIPTION - Production of hydrogen starting from reagents comprising liquid hydrocarbons, gaseous hydrocarbons, and/or oxygenated compounds also deriving from biomasses, where the gaseous hydrocarbons are selected from those comprising natural gas, liquefied petroleum gas, gaseous hydrocarbon streams coming from operative processes in refineries and/or any chemical plant, where the liquid hydrocarbons are selected from naphthas, gas oils, high-boiling gas oils, light cycle oils, heavy cycle oils, and/or deasphalted oils, where the oxygenated compounds are selected from glycerine, triglyceride, carbohydrates, methanol, and/or ethanol, involves pre-heating section (200) of the reagents, at 100-500 degrees C, catalytic partial oxidation section (101) with low contact time, where the reagents react with oxidant including oxygen, air or air enriched in oxygen, to provide synthesis gas, heat recovery section (201), including a boiler which generates steam thus cooling the synthesis gas produced, conversion section (102) of carbon monoxide contained in the synthesis gas to carbon dioxide by water gas shift reaction, section (104) for the removal of the carbon dioxide contained in the stream produced by the water gas shift section, section for the cooling and removal of the condensate produced by the water gas shift section.    DESCRIPTION OF DRAWING(S) - The figure shows a block diagram of production o process of hydrogen.    Catalytic partial oxidation section (101)    Conversion section of carbon monoxide (102)    Removal section of carbon dioxide (104)    Pressure swing adsorption (105)    Pre-heating section (200)