Abstract: An apparatus for making a combustible gas that comprises a vessel filled with a liquid, a submerged electric arc between a moving anode acting on a cathode moving in a direction perpendicular to the anode. An incandescence of an interface area between the electrodes is enclosed on all sides by insulating skirts, except for clearances suitable for the flow of the liquid through the electric arc and the exit of the liquid. The gas produced by the submerged electric arc acting on the liquid, bubbles to the surface of the liquid for collection at a desired pressure, physical and chemical esoenergetic reactions caused by the electric arc generate heat acquired by the liquid, which can be used to in an external heat exchanger to generate steam or electricity, and solid residues accumulate in strainers placed along a liquid flow for periodic collection.