System for exchange of hydrogen between liquid and solid phases

Patent · Fri Jan 01 00:00:00 EST 1988

OSTI ID:866712

Reilly, James J ^[1]; Grohse, Edward W ^[2]; Johnson, John R ^[3]

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1. Bellport, NY
2. Port Jefferson Station, NY
3. Calverton, NY

The reversible reaction M+x/2 H.sub.2 .rarw..fwdarw.MH.sub.x, wherein M is a reversible metal hydride former that forms a hydride MH.sub.x in the presence of H.sub.2, generally used to store and recall H.sub.2, is found to proceed under an inert liquid, thereby reducing contamination, providing better temperature control, providing in situ mobility of the reactants, and increasing flexibility in process design. Thus, a slurry of particles of a metal hydride former with an inert solvent is subjected to a temperature and pressure controlled atmosphere containing H.sub.2, to store hydrogen and to release previously stored hydrogen. The direction of the flow of the H.sub.2 through the liquid is dependent upon the H.sub.2 pressure in the gas phase at a given temperature. When the actual H.sub.2 pressure is above the equilibrium absorption pressure of the respective hydride the reaction proceeds to the right, i.e., the metal hydride is formed and hydrogen is stored in the solid particles. When the actual pressure in the gas phase is below the equilibrium dissociation pressure of the respective hydride the reaction proceeds to the left, the metal hydride is decomposed and hydrogen is released into the gas phase.

• Research Organization: Associated Universities, Inc., Upton, NY (United States)
• DOE Contract Number: AC02-76CH00016
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4769225
• OSTI ID: 866712
• Country of Publication: United States
• Language: English

Related Subjects

exchange
hydrogen
liquid
solid
phases
reversible
reaction
rarw
fwdarw
mh
metal
hydride
former
forms
presence
store
recall
found
proceed
inert
reducing
contamination
providing
temperature
control
situ
mobility
reactants
increasing
flexibility
process
design
slurry
particles
solvent
subjected
pressure
controlled
atmosphere
containing
release
previously
stored
direction
flow
dependent
gas
phase
equilibrium
absorption
respective
proceeds
formed
below
dissociation
left
decomposed
released
atmosphere containing
controlled atmosphere
inert liquid
temperature control
gas phase
solid particles
metal hydride
solid phase
solid particle
dissociation pressure
inert solvent
previously stored
pressure control
pressure controlled
process design
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