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Title: Hydride compositions

Disclosed are 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 H 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 H, and then heating below the softening temperature of any of the constituents. When the composition is used to store hydrogen, its hydrogen content can be found simply by measuring P{sub H}{sub 2} and determining H/M from the isothermic function of the composition.
Inventors:
Issue Date:
OSTI Identifier:
206401
Assignee:
English SRS; SCA: 080201; 360601; 360606; PA: EDB-96:058410; NTS-96:011876; SN: 96001550303
Patent Number(s):
PATENTS-US-A8192265
Application Number:
ON: DE96006452; PAN: 8-172,265
Contract Number:
AC09-89SR18035
Resource Relation:
Other Information: PBD: 1994
Research Org:
Westinghouse Savannah River Co., Aiken, SC (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN FUEL; 36 MATERIALS SCIENCE; HYDRIDES; PRODUCTION; ADSORPTION ISOTHERMS; HYDROGEN STORAGE; MIXTURES