Compositions – Compositions containing a single chemical reactant or plural... – Inorganic reactant other than sulfur containing
Patent
1994-02-07
1995-10-24
Langel, Wayne
Compositions
Compositions containing a single chemical reactant or plural...
Inorganic reactant other than sulfur containing
206 07, 25218233, 423644, 4236582, C01B 308, C01B 624
Patent
active
054607450
ABSTRACT:
A composition for use in storing hydrogen, and a method for making the composition. The composition comprises a mixture of two or more hydrides, each hydride having a different series of hydrogen sorption isotherms that contribute to the overall isotherms of the mixture. The hydrides are chosen so that the isotherms of the mixture have regions wherein the hydrogen equilibrium pressure increases with increasing hydrogen, preferably linearly. The isotherms of the mixture can be adjusted by selecting hydrides with different isotherms and by varying the amounts of the individual hydrides, or both. Preferably, the mixture is made up of hydrides that have isotherms with substantially flat plateaus and in nearly equimolar amounts. The composition is activated by degassing, exposing to hydrogen and then heating at a temperature below the softening temperature of any of the. constituents so that their chemical and structural integrity is preserved. When the composition is used to store hydrogen, its hydrogen content can be found simply by measuring P.sub.H.sbsb.2 and determining H/M from the isothermic function of the composition.
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Dixon Harold M.
Langel Wayne
Moser William R.
The United States of America as represented by the United States
Tumm Brian R.
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