NOVELTY - A thermoelectric reformer unit comprises rigid reformer casing (1) having inlet for fuel and exit for syn gas; inlet pipe for liquid or gaseous hydrogenous fuel; reformer core (20) penetrated by the inlet pipe (2) and containing single electrode (103) made of thermoelectric material having high electrical and thermal conductivities in a circuit with an energy source; outlet pipe for hydrogen-rich syn gas formed by dissociation of hydrogenous fuel that penetrates exit side of casing; and unreformed fuel outlet pipe (4) that penetrates exit side of casing.    USE - For producing hydrogen and syn gas from liquid/gaseous hydrogenous compounds (claimed). The syn gas produced is used to power internal combustion engines certain, types of fuel cells, or other energy conversion equipment. The liquid/gaseous hydrogenous compounds include fossil-based hydrocarbons such as methane, methanol, ethanol, gasoline, diesel oil and propane; renewable hydrocarbons e.g. vegetable oils or biomass oils; or hydrogen-containing inorganic compounds such as water, ammonia.    ADVANTAGE - The thermoelectric reformer unit results in very high conversion efficiencies for hydrogen production due to minimum loss of energy from the reactor core and from the reactor itself. This thermoelectric reformer unit is stand-alone unit of integrated system for electric power generation, which is sufficiently light-weight and can be used for on-board vehicle applications, on-site refueling stations, and on-site stationary power generation systems. The thermoelectric reformer uses only fuel and electricity. There is no combustion and therefore no air is required. Consequently, dilution effects from nitrogen or from the formation of nitrogen oxides and/or ammonia are absent. The electrode material directly contacts the fuels, which resist the reaction with fuels as well as causing the corrosion by the fuels. Due to extremely high thermal conductivity and high electric conductivity of thermoelectric materials, the heat energy converted from electricity is transmitted as photons or light, to the surrounding liquid or gaseous fuels, to decompose and dissociate them into synthetic gas that typically contains hydrogen, carbon monoxide, carbon dioxide and trace amount of hydrocarbons. The electrical circuits for the energy sources in the reactor core are designed to set up continuous operation that create optimal conditions for enhancing reactions rates, and hence high level of reforming or conversion efficiency.    DETAILED DESCRIPTION - Thermoelectric reformer unit comprises rigid reformer casing (1) having section with fuel entry side and synthetic gas exit side; inlet pipe (2) for liquid or gaseous hydrogenous fuel; reformer core (20) penetrated by the inlet pipe and containing single electrode (103) made of thermoelectric material in a circuit with an energy source, emitting high energy photons in visible to ultraviolet or black light spectra and submerged in a hydrogenous fuel; an outlet pipe for hydrogen-rich synthetic gas formed by dissociation of hydrogenous fuel that penetrates exit side of casing; unreformed fuel outlet pipe (4) that penetrates exit side of casing; and a unit for relieving pressure in reformer core caused by synthetic gas formation. The thermoelectric material has electrical conductivity greater than 500 s/cm and thermal conductivity greater than 1 W/mK.    DESCRIPTION OF DRAWING(S) - The figure shows cross-sectional view of the thermoelectric reformer.    Casing (1)    Fuel inlet pipe (2)    Gas outlet pipe (3)    Fuel outlet pipe (4)    Pressure tube (12)    Pressure gage (13)    Temperature sensors (15, 16)    Reformer core (20)    Electrode (103)    Sealing line (L)