HIGH TEMPERATURE ELECTROLYZER (HTE) INCLUDING A PLURALITY OF CELLS, HAVING IMPROVED OPERATION IN THE EVENT OF BREAKAGE OF AT LEAST ONE CELL AND DURING AGING

摘要

A process of electrolyzing water at high temperatures implemented by a cell stack reactor, including: a) simultaneously circulating water vapour at each cathode and at each anode as a leaching gas, temperatures of the water vapour at an inlet of each anode and each cathode being lower than high temperatures at which electrolysis is carried out and the water vapour circulating at the anode being at an overpressure with respect to the cathode; b) upon starting the electrolysis, supplying electrical power having a substantially constant electrical voltage across terminals of the stack and maintaining same. In event of breakage of one or more cells, complete destruction of the stack is avoided and high production efficiency is maintained, and efficiency is maintained during ageing.