The synthesis and characterization of a Mg–Ni alloy having La and Ce as catalysts, have been performed. The alloy behavior was studied at given fixed temperature and pressure during hydrogen absorption/desorption tests. The La and Ce addition was carried out starting from a commercial alloy, named “Firesteel”. The alloy synthesized has the following formula Mg68Ni26M5X, where X represents Si and Fe impurities and M stands for the mixture of rare earths metals. The alloy has been prepared by a melting process in an induction furnace equipped with a centrifugal casting system and then grinded, by both hydraulic press and ball milling. The alloy has been characterized by SEM, BET, XRD, DSC-TGA analysis and by a mass flow measurement apparatus. The experiments on alloy sample showed that, after activation, hydrogenation occurs at 300 °C in three stages at three different pressures: 3, 4 and 7 atm, involving respectively 0.15 wt%, 0.4 wt% and 2.2 wt% of hydrogen absorbed. Reversible hydride dehydrogenation, inside the mass flow measurement apparatus, requires a working temperature of 350 °C to obtain, with remarkable reaction rate, about 2.7%, hydrogen desorption.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology
Dell'Era, A., Pasquali, M., Vecchio Ciprioti, S., Lupi, C., Brotzu, A., Mura, F., & Tuffi, R. (2017). Synthesis and characterization of a Mg–Ni-RE alloy for hydrogen storage. International Journal of Hydrogen Energy, 42(42), 26333 - 26342. https://doi.org/10.1016/j.ijhydene.2017.08.207