Patent ID: 6342198
Filing Date: 2002-01-29
Classification: C01B,Y02E

Abstract:
A hydrogen storage composition having a hydrogenated state and a dehydrogenated state, whereina) in said hydrogenated state said composition comprises: i) magnesium hydride, the magnesium component of which reversibly forms said hydride, and ii) of an aluminium heat transfer medium in intimate contact with said hydride and effective to transfer heat to said hydride for dehydrogenation of said hydride, and b) in said dehydrogenated state said composition comprises: iii) at least one intermetallic compound of said magnesium component of said hydride and said aluminium medium, said at least one intermetallic compound comprising at least one Mgâ€”Al phase; said intermetallic compound exploiting the total metal content of the magnesium component and the aluminium heat transfer medium, there being no free metal and wherein in said hydrogenated state, said hydride and said metallic medium are in fine particle form composed of particles having a size below 10 microns.