Maximization and Efficient Production Rates of Different Zero Carbon Electrofuels using Dry Alkaline Electroyzers

The present work focused on the comparison between HHO and hydrogen electrolyzers in design, gas production, and various parameters which affect the performance and efficiency of alkaline electrolyzers. The primary goal is to generate the highest possible hydrogen and HHO gas flow rates. Hydrogen and HHO were produced using 3 mm electrode of stainless steel 316L with 224 cm2 surface area. Hydroxy and hydrogen rates were affected by electrolyte content, cell connection, electric current, operating time, electrolyte temperature, and voltage. Maximum HHO generation values were 1020, 1076, 1125, and 1175 mL min−1 n at 5, 10, 15, and 20 g L−1 of sodium hydroxide (NaOH) with supply currents of 15, 15.3, 15.6, and 16 A, respectively. Once it stabilized after 30 min, the temperature increased to 26, 30, 35, and 38 °C, respectively, and remained there. With currents of 18, 18.45, 18.7, 19.2, 19.5, and 19.8 A, hydrogen output peak values after 60 min. stayed constant at 680, 734, 785, 846, 897, and 945 mL min-1. at 5, 10, 15, and 20 g L−1 NaOH catalyst concentrations. At 5, 10, 15, and 20 g L−1 catalyst ratios, the temperatures were elevated to constant values of 28.5, 32, 37.9, 40.5, 41.4, and 43 °C, respectively. With cell design [4C3A19N], electrolyte concentration of 5 g L−1 NaOH, and current of 14 A, maximum HHO productivity was 866 mL min−1. and 74.23% efficiency. In a cell design of [4C5A17N], with catalyst content of 10 g L−1, maximum productivity was 680 mL min−1 for hydrogen and highest production efficiency of 72.85% was attained at 18 A.