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Environmental degradation owing to the combustion of fossil fuel and the limited availability of their mines has evolved globally as a serious matter of concern. Recently, hydrogen (H2) gas has gained importance as an alternate source of energy due to its many advantages. The production of H2 by the reaction of aluminum (Al) and water (H2O) in the presence of aqueous KOH (aq. KOH) is a promising technique in terms of emission and productivity. The Al-H2O reaction in the presence of aq. KOH is characterized by good conversion efficiency at the expense of no harmful emissions. The process uses scrap Al as the raw material. The reactions are carried out at temperatures of 328 K–348 K at a step of 10 K. The concentrations of aq. KOH considered are 3.5 M, 4.5 M, and 5.5 M. The sizes and the masses of Al pellets used in the reaction are 0.5 cm, 1.0 cm, 1.5 cm, and 0.5 g, 1.5 g, and 2.5 g respectively. The experimental hydrogen generation rates at 348 K, 338 K, and 328 K for a fixed concentration of 4.5 M are measured to be 21.6 ml.min−1, 19.0 ml.min−1, and 16.36 ml.min−1 respectively. The activation energy for the reaction is found to be 43.41 kJmol−1. The reactions are carried out with distilled water and tap water separately to observe the effect of the quality of water on the hydrogen generation rate. The reactions are carried out in the presence of three different alkaline solutions, viz. KOH, NaOH, and Ca(OH)2 to compare the Al hydrolysis efficiency. The best fit of the experimental data by regression analysis shows an adjusted R2 value of 0.99. Analysis of variance represents “p” value as 5.5 \(\times\) 10–12 indicating the statistical significance of the regression model.

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Mathematical Modeling Using Data-Driven Techniques of the Reaction Kinetics for the Production of H2 Using Aluminum and Alkaline Water

  • 会议论文

  • 发表日期：

    2025年

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  • Biswajyoti Das,
  • Debasish Sona,
  • Biplab Thengal

摘要

Environmental degradation owing to the combustion of fossil fuel and the limited availability of their mines has evolved globally as a serious matter of concern. Recently, hydrogen (H2) gas has gained importance as an alternate source of energy due to its many advantages. The production of H2 by the reaction of aluminum (Al) and water (H2O) in the presence of aqueous KOH (aq. KOH) is a promising technique in terms of emission and productivity. The Al-H2O reaction in the presence of aq. KOH is characterized by good conversion efficiency at the expense of no harmful emissions. The process uses scrap Al as the raw material. The reactions are carried out at temperatures of 328 K–348 K at a step of 10 K. The concentrations of aq. KOH considered are 3.5 M, 4.5 M, and 5.5 M. The sizes and the masses of Al pellets used in the reaction are 0.5 cm, 1.0 cm, 1.5 cm, and 0.5 g, 1.5 g, and 2.5 g respectively. The experimental hydrogen generation rates at 348 K, 338 K, and 328 K for a fixed concentration of 4.5 M are measured to be 21.6 ml.min−1, 19.0 ml.min−1, and 16.36 ml.min−1 respectively. The activation energy for the reaction is found to be 43.41 kJmol−1. The reactions are carried out with distilled water and tap water separately to observe the effect of the quality of water on the hydrogen generation rate. The reactions are carried out in the presence of three different alkaline solutions, viz. KOH, NaOH, and Ca(OH)2 to compare the Al hydrolysis efficiency. The best fit of the experimental data by regression analysis shows an adjusted R2 value of 0.99. Analysis of variance represents “p” value as 5.5 \(\times\) 10–12 indicating the statistical significance of the regression model.