Direct synthesis of catalyzed hydride compounds
A method is disclosed for directly preparing alkali metal aluminum hydrides such as NaAlH.sub.4 and Na.sub.3 AlH.sub.6 from either the alkali metal or its hydride, and aluminum. The hydride thus prepared is doped with a small portion of a transition metal catalyst compound, such as TiCl.sub.3, TiF.sub.3, or a mixture of these materials, in order to render them reversibly hydridable. The process provides for mechanically mixing the dry reagents under an inert atmosphere followed by charging the mixed materials with high pressure hydrogen while heating the mixture to about 125.degree. C. The method is relatively simple and inexpensive and provides reversible hydride compounds which are free of the usual contamination introduced by prior art wet chemical methods.
- Research Organization:
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- Assignee:
- Sandia National Laboratories
- Patent Number(s):
- 6,793,909
- Application Number:
- 10/066,375
- OSTI ID:
- 1175046
- Country of Publication:
- United States
- Language:
- English
Solid state phase transformations in LiAlH4 during high-energy ball-milling
|
journal | December 2000 |
Titanium catalyzed solid-state transformations in LiAlH4 during high-energy ball-milling
|
journal | November 2001 |
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