Process for the storage of hydrogen using a system that strikes a balance between an alloy of magnesium and palladium and the corresponding hydride
AssigneeInstitut Francais du Petrole
InventorsPascal Raybaud, François Ropital
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Abstract
A process for the reversible storage of hydrogen, comprising bringing into contact an alloy of magnesium and palladium with the gaseous hydrogen leading to the formation of hydride or corresponding hydrides, comprises the use of a balanced system corresponding to the formula: MgxPdMgxPdHn in which atomic ratio x takes on a value of 3 to 6, and n is the number of hydrogen atoms corresponding to the stoichiometry of the hydride or hydrides formed or to the formula: MgxPdMg2PdH4+Mgx-2Hn in which the atomic ratio x takes on a value of 7 to 9, and n is the number of hydrogen atoms corresponding to the stoichiometry of the hydride or hydrides formed.
Claims19
A process for reversible storage of hydrogen in a crystalline material, said process comprising bringing an alloy comprising magnesium and palladium into contact with gaseous hydrogen leading to the formation of hydride or corresponding hydrides, according to a balanced system corresponding to the formula:
- Mgx Pd Mgx PdHn
- in which atomic ratio x takes on a value of 3 to 6, and n is the number of hydrogen atoms corresponding to the stoichiometry of the hydride or hydrides formed.
A process for reversible storage of hydrogen in a crystalline material, said process comprising bringing an alloy comprising magnesium and palladium into contact with gaseous hydrogen leading to the formation of a mixture containing the Mg2PdH4 hydride phase and other corresponding hydrides, according to a balanced system corresponding to the formula:
- Mgx Pd Mg2PdH4 +Mgx-2Hn
- in which the atomic ratio x takes on a value of 7 to 9, and n is the number of hydrogen atoms corresponding to the stoichiometry of the hydride or formed hydrides.
A new crystalline structure corresponding to formula Mg2PdH4 and belonging to space group C2/c.
Dependencies are inferred from the claim text.