Silva, DiogoNunes, Helder XavierRangel, Carmen M.Pinto, A. M. F. R.2025-10-032025-10-032025-07Silva, D. L., Nunes, H. X., Rangel, C. M. & Pinto, A. M. F. R. (2025). Scale-up of a clean hydrogen production system through the hydrolysis of sodium borohydride for off-grid applications. In: International Journal of Hydrogen Energy, 2025, vol. 144, pp. 1207–1212. https://doi.org/10.1016/j.ijhydene.2025.04.1640360-3199http://hdl.handle.net/10400.9/6084ABSTRACT: Hydrogen is considered a promising energy vector with the potential to replace fossil fuels, and sodium borohydride serves as an effective energy carrier capable of releasing hydrogen (H2) for off-grid applications. However, the hydrolysis of sodium borohydride has only matured at laboratory-scale. Therefore, the scale-up of a laboratory reactor was designed and manufactured to study the effect of larger H2 production. For that, the effect of inhibitor NaOH concentration and water quality were studied. Experiments using 3 wt% NaOH showed overall better performance than those using 1 wt%. Additionally, experiments using tap water - scarcely reported in the literature - demonstrated performance equal to or better than that achieved with distilled water. These results are indicative of a possible significant reduction in the H2 production cost through this method.engClean energyHydrogen productionSodium borohydrideHydrolysisFuel cellsjournal article10.1016/j.ijhydene.2025.04.1641879-3487