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Method of preparing titanium iron-containing material for hydrogen storage
| Details |
Inventors: van Mal, Harmannus H.; van Esveld, Hendrik A.; van Wieringen, Johannes S.; Buschow, Kurt H. J.;
Assignee: U.S. Philips Corporation (New York, NY)
Primary Examiner: Roy; Upendra
Assistant Examiner:
Attorney, Agent or Firm: Schechter; Marc D.
A material for storing hydrogen consisting of a titanium-iron alloy having 5-30 at.% of one or more metals of the group chromium, zirconium, manganese and vanadium. |
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DETAILED DESCRIPTION It is an object of the invention to provide a material which, compared with materials which exclusively contain titanium and iron can be activated in a simple manner at room temperature.
It is a further object of the invention to provide an apparatus and a method for storing and giving off hydrogen while using a material which, compared with materials which exclusively contain titanium and iron, can be activated in a simple manner at room temperature.
In accordance with this invention these objects are satisfied by a material which contains, besides titanium and iron in the said ratios one or more materials from the group comprising by chromium, zirconium, manganese and vanadium.
Preferably, the composition of the material in gram-atoms is, based on the total material, 5 to 30% of one or more of the elements of the group comprising the metals chromium, zirconium, manganese and vanadium.
The remainder of the material is titanium and iron in the specified mutual ratio.
The presence of these metals in the material results, in many cases, in the same quantity of hydrogen being absorbed at a lower hydrogen pressure as compared with materials which contain titanium and iron, only while the total capacity of absorption, in ml of hydrogen per gram of material, is in general of the same order of magnitude as with materials which contain titanium and iron only.
This has the advantage that the reservoirs may be simpler in construction, as they need only be able to withstand relatively lower pressures.
Furthermore, there is a greater freedom of choice so that it is possible for a given application to utilize a material having the most favorable properties as regards hydrogen absorption.
For energy storage by means of hydrogen absorption, in which one wants to permit hydrogen pressures to a maximum of 2 atmospheres at approximately 20.
degree.
C.
in a simple apparatus, a material which contains, Ti and Fe in a mutual ratio of between 2.
5:1 and 1.
1:1 and Mn in a quantity of 5 to 30 atom % based on the total material has appeared particularly suitable
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