STM Article Repository

In this project, the principles of electrochemistry were employed to decompose water into oxygen and hydrogen gas at low current. Different electrolyzer designs were investigated to produce sufficient amount of gases with minimum heat loss and low current withdrawal. A flowrate of HHO gas about 634 ml/min was achieved at low current about 20 A using 16 rectangular plates (3 cathodes, 3 anodes and 10 neutrals). The low current was achieved by choosing the suitable electrolyzer design and electrolyte concentration. The efficiency of water electrolysis was calculated as the ratio between the HHO flow rate measured experimentally to that measured theoretically from Farady's law. The most effective electrolyzer is discovered to have 22 plates (4 anodes, 4 cathodes and 14 neutrals). The HHO flowrate was 740 ml/min at 17 A and 20 g KOH with parallel connection. The efficiency was 62.92%.