Hydrogenation of the Milled Mg-Ni Compound

Magnesium hydride is one of the hydrogen storage materials in solid state that is taken into consideration duo to its high storage capacity. This paper investigates the adsorption of magnesium and nickel catalyst combination in 473 K at 2. 0 and 3. 5 Mpa. A planetary ball mill was used in order to produce fine particles and to increase adsorption. A volumetric method (Sievert) was used for hydrogen storage analysis. XRD analysis was performed before and after hydrogenation in order to phase identification. SEM images were used for morphological characterization and particle size distribution. Higher pressure leads to increase of adsorption because it helps to influence of hydrogen. Finally Mg+10Ni compound showed the adsorption of 2. 04% and 3. 51% wt. hydrogen in pressure of 2. 0 and 3. 5 Mpa، respectively. The results showed that Ni is a good catalyst for hydrogen storage with accelerating hydrogen molecules dissociation and assisting to better milling.