Hydride compositions
- North Augusta, SC
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.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- DOE Contract Number:
- AC09-89SR18035
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 5460745
- OSTI ID:
- 870128
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
compositions
composition
storing
hydrogen
method
comprises
mixture
hydrides
series
sorption
isotherms
contribute
overall
chosen
regions
equilibrium
pressure
increases
increasing
preferably
linearly
adjusted
selecting
varying
amounts
individual
substantially
flat
plateaus
nearly
equimolar
activated
degassing
exposing
heating
temperature
below
softening
constituents
chemical
structural
integrity
preserved
store
content
found
simply
measuring
sbsb
determining
isothermic
function
hydrogen content
pressure increase
softening temperature
substantially flat
flat plate
composition comprises
temperature below
structural integrity
storing hydrogen
hydride composition
hydrogen sorption
pressure increases
molar amount
equimolar amounts
molar amounts
sorption isotherms
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