Abstract
This study explores hydrogen production via methanolysis of potassium borohydride (KBH4) catalysed by boric acid (H3BO3) amidst growing demand for sustainable energy. It focuses on optimising reaction conditions to efficiently maximise hydrogen output. Parameters examined include reaction temperatures (20, 30, 40, 50°C), H3BO3 concentrations (53.9, 107.8, 161.7, 269.5 mM), methanol volumes (2, 5, 7, 15, 20 mL), and KBH4 concentrations (0.124, 0.247, 0.371, 0.618 M), assessing their impact on hydrogen generation rates (HGRs). Kinetic analysis shows the reaction follows a power law mechanism with a reaction order of 0.5 for KBH4, indicating a significant concentration dependency. The study identifies activation energies of 37.24 and 32.54 kJ·mol−1, providing insights into the energy barrier of the reaction, and finds optimal conditions at 30°C, achieving a remarkable HGR of 3154.98 mL·min−1·g cat−1. ΔG°, ΔHads and ΔS° were also determined, further elucidating the reaction dynamics.
Original language | English |
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Article number | 2394824 |
Journal | International Journal of Ambient Energy |
Volume | 45 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2024 |
Bibliographical note
Publisher Copyright:© 2024 Informa UK Limited, trading as Taylor & Francis Group.
Keywords
- boric acid
- catalysis
- Hydrogen production
- methanolysis
- potassium borohydride