NOVELTY - Thermocatalytic apparatus includes recycling mechanism for recycling a portion of hydrogen-depleted gas to a reactor (1) to sustain high catalytic activity of carbon catalyst in-situ; mechanism for recovering carbon particles from the reactor, mechanism for disintegration of carbon particles that are heated to provide externally activated catalyst recycled to the reactor; and mechanism for transporting pure hydrogen into anode (9) of a fuel cell (7) to generate electricity (11).    USE - The apparatus is used for generating electricity and sustainable carbon dioxide (CO2)-free production of hydrogen and carbon via continuous thermocatalytic decomposition of hydrocarbons over carbon-based catalyst in air and/or water-free environment, utilizing continuous reactivation of the catalyst (claimed).    ADVANTAGE - The inventive apparatus provides a more effective, versatile and cost effective process for CO2-free production of hydrogen and carbon from different hydrocarbons using inexpensive and readily available catalytic materials. It provides a sustainable continuous process for carbon monoxide (CO)/CO2-free production of hydrogen and carbon by thermocatalytic decomposition (pyrolysis, cracking) of hydrocarbon fuels, over carbon-based catalysts. It produces hydrogen and carbon from sulfurous hydrocarbon fuels without additional purification of the feedstock. It integrates the thermocatalytic reactor with the fuel cell for the production of electricity. The apparatus and thermocatalytic process improve the activity and stability of carbon catalysts during the thermocatalytic process and produce both high purity hydrogen and carbon, from any hydrocarbon fuel, including sulfurous fuels. They eliminate the production of undesired contaminants, CO and CO2, in the production of pure hydrogen and the need for water gas shift reaction, CO2 separation and hydrogen purification steps. The process is moderately endothermic so that 10% of methane feedstock would be needed to drive the process. It produces a very important byproduct, clean carbon.    DETAILED DESCRIPTION - Thermocatalytic apparatus comprises:    (A) thermocatalytic reactor with a moving bed of carbon particulates;    (B) purging mechanism for purging the moving bed of carbon particulates of moisture and air;    (C) recovering mechanism for recovering hydrogen-containing gas from the reactor;    (D) separator mechanism for separating the hydrogen-containing gas of step (c) into a first portion of pure hydrogen and a second portion of hydrogen-depleted gas;    (E) recycling mechanism for recycling a portion of hydrogen-depleted gas to the reactor to sustain high catalytic activity of the carbon catalyst in-situ;    (F) recovering mechanism for recovering carbon particles from the reactor;    (G) mechanism for disintegration of carbon particles of step (f);    (H) heater (6) for heating of carbon particles to provide externally activated catalyst that is recycled to the reactor;    (I) recovery mechanism for recovering pure hydrogen from a stream; and    (J) transporting mechanism for transporting the pure hydrogen into anode of a fuel cell, thus generating electricity.    DESCRIPTION OF DRAWING(S) - The figure is a schematic diagram of an apparatus integrated with a fuel cell.    Reactor (1)    Heater (6)    Fuel cell (7)    Anode (9)    Electricity (11)