Method for rapidly carrying out a hydrogenation of a...

Details Method for rapidly carrying out a hydrogenation of a... Method for rapidly carrying out a hydrogenation of a...

C - Chemistry, Metallurgy

01

B

C01B 3/00 (2006.01) C01B 6/04 (2006.01)

Patent

CA 2427605

Disclosed is a method for rapidly carrying out a hydrogenation of a material capable of absorbing hydrogen. It was discovered that when a powder of a material capable of absorbing hydrogen is ground under a hydrogen pressure, not at room temperature but at a higher temperature (about 300~C in the case of magnesium) and in the presence of a hydrogenation activator such as graphite and optionally a catalyst, it is possible to transform completely the powder of this material into a hydride. Such a transformation is achieved in a period of time less than 1 hour whereas the known methods call for periods of time as much as 10 times longer. This is an unexpected result which gives rise to a considerable reduction in the cost of manufacture of an hydride, particularly MgH2.

La présente invention concerne un procédé permettant d'effectuer une hydrogénation rapide d'un matériau capable d'absorber de l'hydrogène. On a découvert que lorsqu'une poudre de matériau capable d'absorber de l'hydrogène est broyée sous une pression d'hydrogène, non pas à la température ambiante mais à une température supérieure (environ 300 ·C dans le cas du magnésium) et en présence d'un activateur d'hydrogénation tel que la graphite et éventuellement un catalyseur, il est possible de transformer entièrement la poudre dudit matériau en un hydrure. Une telle transformation est obtenue en une durée de moins d'une heure tandis que les procédés connus requièrent des durées pouvant aller jusqu'à 10 fois plus. C'est un résultat inattendu qui conduit à une réduction considérable dans le coût de fabrication d'un hydrure, notamment le MgH¿2?.

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