Abstract
Hydrogen production from renewable sources such as photovoltaic solar energy can contribute to a more sustainable energy scenario worldwide. The present work aimed to evaluate hydrogen production via alkaline water electrolysis by finding the optimal operational conditions with electrodes, alkaline electrolyzers, and solar energy with a photovoltaic panel. Firstly, graphite, stainless steel 304, and Monel 400 electrodes were evaluated using a direct voltage source, resulting in maximum hydrogen flow rates of 4.86, 10.40, and 8.12 mL/min, respectively. Then, hydrogen generation was analyzed with electrolytes of KOH, NaOH, and LiOH in 1-10 mol/L concentrations. The highest hydrogen flow rates were found for KOH electrolytes, attributed to their higher electrical conductivity. Therefore, stainless steel electrodes and KOH electrolyte were evaluated with the photovoltaic panel. The optimized conditions were a KOH concentration of 6.18 mol/L and a solar radiation of 900 W/m2 for a hydrogen production of 71.83 mL/min. The hydrogen purity remained at 98.96 ± 0.10%.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
