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US 6,106,801 AGranted
Method for the reversible storage of hydrogen
AssigneeStudiengesellschaft Aktiengesellschaft
InventorsBorislav Bogdanovic, Manfred Schwickardi
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Abstract
A process for the reversible storage of hydrogen, characterized in that the complex alkali metal aluminium hydrides (alkali metal alanates) of general formula 1 ##EQU1## are used as the reversible hydrogen storage materials.
Claims24
A process for the reversible storage of hydrogen, said process comprising:
- a) dehydrogenating a complex alkali metal aluminum hydride of the formula (1):
- M.sup.1.sub.p(1-x) M.sup.2.sub.px AlH.sub.3+p ( 1)
- wherein
- M.sup.1 is selected from the group consisting of Na and K;
- M.sup.2 is selected from the group consisting of Li and K;
- 0.ltoreq.x.ltoreq.0.8;
- and
- 1.ltoreq.p.ltoreq.3;
- to yield hydrogen gas and at least one other product;
- and
- b) hydrogenating said other product to yield said complex alkali metal aluminum hydride of the formula (1);
- wherein steps a) and b) are carried out in any order.
9 more elements
A composition of matter selected from the group consisting of:
- a) Na.sub.2 LiAlH.sub.6 ;
- b) Na.sub.2 LiAlH.sub.6 doped with a dopant comprising a metal selected from the group consisting of transition metals of Groups III to V of the periodic table, iron, nickel and the rare earth metals, or a combination of said metals;
- c) NaAlH.sub.4 doped with a dopant comprising a metal selected from the group consisting of transition metals of Groups III to V of the periodic table, iron, nickel and the rare earth metals, or a combination of said metals;
- and
- d) Na.sub.3 AlH.sub.6 doped with a dopant comprising a metal selected from the group consisting of transition metals of Groups III to V of the periodic table, iron, nickel and the rare earth metals, or a combination of said metals.
2 more elements
Dependencies are inferred from the claim text.