(568a) Promoted Effect of Maleic Acid As an Additive on Thermal Dehydrogenation of Ammonia Borane

Renewable energy has been attracting keen interest with growing concerns over depletion of fossil fuel and climate change. Hydrogen is considered as an alternative energy carrier due to its high calorific value and no greenhouse gas emission. Among the storage technology of hydrogen, ammonia borane (AB, NH₃BH₃) is an attractive candidate owing to its high hydrogen content (19.6%), decomposition under the moderate condition, and stability at room temperature. However, relatively high operating temperature, long-induction period, low H₂ yield, and slow kinetics remain challenges for thermal dehydrogenation of AB. In the present work, the effect of maleic acid as an additive to promote dehydrogenation of AB was investigated for various operating parameters such as AB-maleic acid ratio, temperature, and pressure. Maleic acid has been shown to plays a role in lowering the onset temperature (65 ^oC), while increasing the hydrogen release kinetics of AB. In addition, TPD/MS and FR-IR analysis were performed to understand the reaction mechanisms.