This study investigates the use of alkalis like potassium hydroxide and calcium hydroxide to produce hydrogen from aluminum waste. The study looks at how different alkali volumes and temperatures affect the creation of hydrogen. The findings indicate that while calcium hydroxide decreases hydrogen production, higher temperatures and potassium hydroxide volumes boost it. The association between the variables evaluated and the rate constant that is discovered as a function of the different alkali and its concentration is predicted using a multivariable regression analysis. The effect of varying the mixture's volume ratio on hydrogen production has been studied with respect to H₂ generation from KOH/Ca(OH)₂. The predicted range of KOH/Ca(OH)₂ ratio for producing a considerable amount of hydrogen appears to lie in the neighborhood of 2.0-2.5. Regression study confirms an excellent fit indicating that independent variables explain 80.25% of the variation in the dependent variable, with time being the main influential variable. From the analysis of variance (ANOVA) table, it has been found that 76.22% of the variability in the dependent variable is explained by the independent variables, time being of larger effect on the dependent variable. The histogram of residuals endorses the soundness of the model yet, points toward certain aspects of the model, where improvement or further scrutiny could be warranted on the fit of the data. Different concentrations of KOH and Ca(OH)₂ affect hydrogen generation in a 100-ml mixture which studies maximum hydrogen volume versus KOH/Ca(OH)₂ ratio on maximum hydrogen-gas-dispersion time. The plot, which shows the maximum H2 varying significantly owing to changes in both independent variables, needs a second pass for verification.

doi.org/10.32737/0005-2531-2026-2-92-124