Hydrogenation properties and mechanical stability of pellets made starting from compressed ball-milled MgH2 powders mixed with catalysts (Nb2O5 and graphite) and a binding agent (aluminium powder) have been investigated. Structural characterization with X-ray diffraction and gas–solid reaction kinetic and thermodynamic tests with a Sievert’s apparatus have been done on the samples up to 50 hydrogen absorption/desorption (a/d) cycles. The best cycling behaviour and mechanical strength stability have been observed for pellets of catalysed MgH2 powders added with 5 wt% aluminium annealed in vacuum at 450 C before starting the a/d cycles. This mechanical stability to cycles has been attributed to the formation of a solid solution of aluminium in magnesium.

Pellets of MgH2-based Composites as Practical Material for Solid State Hydrogen Storage / A., Khandelwal; F., Agresti; G., Capurso; S., Lo Russo; A., Maddalena; Gialanella, Stefano; G., Pricipi. - In: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY. - ISSN 0360-3199. - STAMPA. - 35:(2010), pp. 3565-3571.

Pellets of MgH2-based Composites as Practical Material for Solid State Hydrogen Storage

Gialanella, Stefano;
2010-01-01

Abstract

Hydrogenation properties and mechanical stability of pellets made starting from compressed ball-milled MgH2 powders mixed with catalysts (Nb2O5 and graphite) and a binding agent (aluminium powder) have been investigated. Structural characterization with X-ray diffraction and gas–solid reaction kinetic and thermodynamic tests with a Sievert’s apparatus have been done on the samples up to 50 hydrogen absorption/desorption (a/d) cycles. The best cycling behaviour and mechanical strength stability have been observed for pellets of catalysed MgH2 powders added with 5 wt% aluminium annealed in vacuum at 450 C before starting the a/d cycles. This mechanical stability to cycles has been attributed to the formation of a solid solution of aluminium in magnesium.
2010
A., Khandelwal; F., Agresti; G., Capurso; S., Lo Russo; A., Maddalena; Gialanella, Stefano; G., Pricipi
Pellets of MgH2-based Composites as Practical Material for Solid State Hydrogen Storage / A., Khandelwal; F., Agresti; G., Capurso; S., Lo Russo; A., Maddalena; Gialanella, Stefano; G., Pricipi. - In: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY. - ISSN 0360-3199. - STAMPA. - 35:(2010), pp. 3565-3571.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/89641
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