Abstract

CONTRERAS, Luis; COELLO, Diana  and  ESCOBAR, Luis. Energy storage in the form of Hydrogen in Magnesium Hydride MgH ₂. Novasinergia [online]. 2020, vol.3, n.2, pp.80-92.  Epub Dec 01, 2020. ISSN 2631-2654.  https://doi.org/10.37135/ns.01.06.07.

In this research, the synthesis, structural characterization, and thermal analysis of hydrogen (H2) desorption of magnesium hydride (MgH2) for hydrogen storage was carried out. The samples were mechanically grounded for 2, 5, and 10 hours in atmospheres containing argon (Ar) and hydrogen (H2). Subsequently, the samples were characterized by (1) X-ray diffraction (XRD), (2) differential scanning calorimetry (DSC), and (3) thermogravimetric analysis (TGA). Diffractions of mechanically grounded samples showed a reduction in grain size, which improves the diffusion of H2 by reducing dehydrogenation temperatures by up to 118 ºC. The maximum amount of H2 obtained from the samples was 6.65% w/w.

Keywords : Absorción; desorción; hidrógeno; hidruro de magnesio; molienda mecánica.

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