NOVELTY - The process comprises pyrolyzing a charge of organic material by passing a treatment gas stream (FT) through the organic material, performing oxycombustion of a part of the volatile organic compounds present in the pyrolysis gas stream by injection of oxygen (O2) in upstream of a layer (302) of oxidation-reduction filtering material (302) comprising high temperature carbon elements, and passing the oxidized pyrolysis gas stream (FPO) through the oxidation-reduction layer to produce a synthesis gas stream (FS) comprising hydrogen obtained by deoxidation of water steam.    USE - The process is useful for producing hydrogen from organic material.    ADVANTAGE - The process is capable of easily, comprehensively and economically producing hydrogen from organic material with controlled proportion of hydrogen and carbon monoxide, avoids the generation of residual pollutants such as tar, and minimizes the loss of the carbon elements developed from the biomass.    DETAILED DESCRIPTION - The process comprises pyrolyzing a charge of organic material by passing a treatment gas stream (FT) through the organic material, performing oxycombustion of a part of the volatile organic compounds present in the pyrolysis gas stream by injection of oxygen (O2) in upstream of a layer (302) of oxidation-reduction filtering material (302) comprising high temperature carbon elements, and passing the oxidized pyrolysis gas stream (FPO) through the oxidation-reduction layer to produce a synthesis gas stream (FS) comprising hydrogen obtained by deoxidation of water steam by the high temperature carbon elements. The treatment gas stream comprises carbon dioxide (CO2). The pyrolysis produces a part of a pyrolysis gas stream (FP) comprising the treat gas stream (FT), water steam (H2O) and volatile organic compounds (VOCs) obtained from the organic material, and pyrolysis carbon comprising carbon elements. The oxidation-reduction layer comprises oxides in a reduced form (Me), where the oxides produces deoxidation of a part of the water steam. The deoxidation produces hydrogen elements after the deoxidation of oxides found in an oxidized form (MeO). A part of oxide in oxidized form obtained after the deoxidation is used for an oxidation of a part of volatile organic compounds in upstream of the oxidation reducing layer. A part of oxide in reduced form is reused in the oxidation reducing layer for a new deoxidation of the water steam, after the oxidation the oxides are found in reduced form. The synthesis gas stream further comprises carbon monoxide (CO) and water vapor. A temperature of synthesis gas stream is controlled or reduced in downstream of the oxidation-reduction layer thus causing a redox reaction known as water-shift between the carbon monoxide and the water vapor and producing H2 and CO2. A residual water vapor is produced after water-shift reaction, and is separated by condensation of water vapor. The hydrogen is separated from the synthesis gas stream, and then a part of the carbon dioxide is reused as treat gas stream for the pyrolysis of a new charge of organic material. The temperature is lowered by transferring a thermal energy towards water in circulation to carry out a change of state of the liquid to obtain overheated water steam, and towards a part of treat gas stream to supply the treatment gas stream at a pyrolysis temperature of organic material. Water is added to the oxidized pyrolysis gas stream. A part of the pyrolysis carbon is used to compose a part of the oxidation-reduction filter material layer. The organic material is dehydrated and carbonized after the pyrolysis step thus terminating the gasification of organic material. An INDEPENDENT CLAIM is included for a system for producing hydrogen from organic material.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross-sectional view of a system for producing hydrogen.    Second reactor (30)    Trough (200)    Mechanical grids (201, 202, 203, 204)    Double wall (205)    Oxidation-reduction layer. (302)