NOVELTY - Generation of energy from an initial gas stream (F1) containing water vapor (H2O) involves deoxidation of at least part of the H2O through a layer of carbon element-containing material (designated thermal base) at high temperature to give a first gas stream (Fg1) containing hydrogen (H2).    USE - For generating a renewable energy source (in the form of hydrogen) from a wet gas stream, for use in producing electrical energy.    ADVANTAGE - The energy source is obtained in high yield by a simple procedure. High proportions of the thermal energy of the steam in the initial gas stream and the energy from the deoxidation of water are recovered. The carbon elements used in the deoxidation are obtainable from vegetable or animal biomass (as well as from e.g. coal, lignin or peat).    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a corresponding energy generation system, in which the thermal base is generated in a reactor (R) for generating the thermal base and the initial gas stream is passed through the thermal base.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic diagram of one form of the energy generation process, using a steam producing boiler.    Solid fuel storage unit (1)    Alternator, for generating electricity (A)    Regulating system for supply of fuel to reactor (B)    Charged biomass (B1)    Biomass for combustion (B2)    Dried biomass (B3)    Compressors (C1, C2)    Gas boiler (Ch)    Mixing chamber (Cm)    Heat exchangers (E1, E2)    Air cooler (E3)    Initial gas stream, containing water vapor and carbon dioxide (F1)    First gas stream, containing hydrogen (Fg1)    Second gas stream, containing water vapor at high temperature and pressure (Fg2)    Third gas stream, containing water vapor at low temperature and pressure (Fg3)    Neutral gas stream, containing carbon dioxide (Fn)    Released carbon dioxide stream (Fnr)    Compressed carbon dioxide stream (Fns)    Carbon dioxide stream serving as coolant (Fns1)    Treated gas stream (Ft)    Water, as thermodynamic fluid (Fth)    High temperature combustion gas stream (Gc1)    Reactor (R)    Compressed carbon dioxide reservoir (S1)    Industrial gas separation system (S-G)    Steam turbine (TAV)    Mixer (VAP)