Gkss-Forschungszentrum Geesthacht Gmbh

Helmholtz-Zentrum Hereon Gmbh

Helmholtz-Zentrum Geesthacht Zentrum Fur Material Und Kustenforschung Gmbh

Claudio Pistidda

Martin Dornheim

Thomas Klassen

Klaus Taube

Rüdiger Bormann

Julián Puszkiel

Gagik Barkhordarian

Thi Thu Le

Klaus Horst Taube

The present invention relates to a method for producing tetrahydridoborate salts with high efficiency at low cost. The method for the production of metal borohydride salts according to the present invention comprises the steps of providing an anhydrous metal borate salt and milling the anhydrous metal borate salt in the presence of a metal material based on magnesium or magnesium alloys in a hydrogen atmosphere at a temperature and for a time sufficient to produce the metal borohydride salt. In another embodiment of the invention, the method for the production of metal borohydride salts according to the present invention comprises the steps of providing an hydrated metal borate salt and milling the hydrated metal borate salt in the presence of a metal material based on magnesium or magnesium alloys in an inert gas atmosphere at a temperature and for a time sufficient to produce the metal borohydride salts. In a still further embodiment of the invention, the metal material based on magnesium or magnesium alloys is a secondary magnesium material, preferably a Class 2, Class 3, or Class 6 secondary magnesium material.

Method for producing borohydride salts

The present invention concerns a method of activating or regenerating a hydrogen storage material which contains at least one metal hydride. The at least one metal hydride is brought into contact with an inert solvent and the inert solvent is subsequently removed again. After contacting with and removal of the inert solvent, there is not only an increase in the reaction rate but surprisingly the hydrogenation also proceeds more completely. The present method is particularly advantageous when the hydrogen storage material contains at least components which interact with one another during absorption and desorption.

Method of activating or regenerating a hydrogen storage material

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Geesthacht, Germany

Claudio Pistidda