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Using magnesium alloy waste for hydrogen storage materials

11 August 2014

Researchers have shown that magnesium industrial wastes of AZ91 alloy and Mg-10 wt.% Gd alloy can be used for the production of hydrogen storage materials. A paper on their work is published in the Journal of Power Sources.

The team of researchers, from Germany, Denmark, Italy and Sweden, investigated the properties of the alloys by means of volumetric technique; in situ synchrotron radiation powder X-ray diffraction (SR-PXD); and calorimetric methods.

Measured reversible hydrogen storage capacity for the alloys AZ91 and Mg-10 wt.% Gd are 4.2 and 5.8 wt.%, respectively. For the Mg-10 wt.% Gd alloy, the hydrogenated product was also successfully used as starting reactant for the synthesis of Mg(NH2)2 and as MgH2 substitute in the Reactive Hydride Composite (RHC) 2LiBH4 + MgH2.

The conversion process is possible and easily achievable, they noted.

Resources

  • C. Pistidda, N. Bergemann, J. Wurr, A. Rzeszutek, K.T. Møller, B.R.S. Hansen, S. Garroni, C. Horstmann, C. Milanese, A. Girella, O. Metz, K. Taube, T.R. Jensen, D. Thomas, H.P. Liermann, T. Klassen, M. Dornheim (2014) “Hydrogen storage systems from waste Mg alloys,” Journal of Power Sources, Volume 270 Pages 554-563 doi: 10.1016/j.jpowsour.2014.07.129

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