NOVELTY - Sustainable carbon dioxide-free hydrogen and carbon is produced by thermocatalytic decomposition of hydrocarbon stream over moving bed of carbon particles in a reactor; recovering a stream of hydrogen-containing gas; directing the stream to a gas separation unit where pure hydrogen is separated; recovering pure hydrogen; and recycling the hydrogen-depleted gas to the reactor.    USE - For sustainable carbon dioxide-free production of hydrogen and carbon.    ADVANTAGE - The inventive process drastically reduces carbon dioxide emission in the production of hydrogen and carbon from fossil fuels.    DETAILED DESCRIPTION - Production of sustainable carbon dioxide-free hydrogen and carbon via continuous thermocatalytic decomposition of hydrocarbons over carbon-based catalyst in air/or water-free environment, employing continuous reactivation of the catalyst, comprising (a) thermocatalytic decomposition of hydrocarbon stream over moving bed of carbon particulates in a reactor; (b) recovering a stream of hydrogen-containing gas (HCG); (c) directing the stream to a gas separation unit where pure hydrogen is separated from the stream and hydrogen-depleted gas; (d) recovering pure hydrogen; and (e) recycling the hydrogen-depleted gas to the reactor where the catalytically active carbon is generated on the surface of the original carbon catalyst.    INDEPENDENT CLAIMS are also included for;    (1) An apparatus for production of sustainable carbon dioxide-free hydrogen and carbon as above, comprising (i) a thermocatalytic reactor (1) with a stream having a moving bed of carbon particulates; (ii) a membrane gas separation unit (4) for recovering hydrogen-containing gas from the reactor; (iii) a mechanism for recovering pure hydrogen from the stream; (iv) a mechanism for recycling portion(s) of hydrogen-depleted gas to the reactor; (v) a grinder (5) for disintegration of carbon particles after the reactor; and (vi) a heater (6) for heating of carbon particles;    (2) A process for production of electricity and carbon comprising (a) producing hydrogen as above; (b) continually introducing the pure hydrogen into an anode of a fuel cell; (c) continually passing air into a cathode of a fuel cell; and (d) producing electricity and recovering carbon; and    (3) An apparatus for generating electricity and producing carbon comprising the apparatus for production of sustainable carbon dioxide-free hydrogen and carbon; and a polymer electrolyte membrane fuel cell for transporting the pure hydrogen into anode of a fuel cell, where electricity is generated.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic diagram of an apparatus for carrying out the process.    Thermocatalytic reactor (1)    Gas separation unit (4)    Grinder (5)    Heater (6)