Article

Hydrogen was produced through the hydrolysis of water using aluminium scraps and KOH as a catalyst. Wastewater sources included reject water from reverse osmosis processes and car wash water. The optimal pH for hydrogen production was identified as 14, with 1 g of aluminium scraps yielding hydrogen equivalent to 1,360 mL/g.

Particle size and reaction temperature, up to 45 °C, influenced production rates. Within 30 minutes, 94% hydrogen was produced from RO rejects, while car wash water yielded 98.6%. The precipitate from the reaction showed potential for further applications. The estimated cost for producing 1 m³ of hydrogen is Rs. 100.