Intermetalic compounds
A powder of an alloy of lanthanum with cobalt and samarium with nickel is able to absorb under the pressure of 0.4 MPa (4 atm) such amount of hydrogen, which was able to store in the same vessel but under the pressure of 100 MPa (1000 atm).
Glass Microspheres
Tiny hollow glass spheres can be used to safely store hydrogen. The glass spheres are warmed, increasing the permeability of their walls, and filled by being immersed in high-pressure hydrogen gas. The spheres are then cooled, locking the hydrogen inside of the glass balls. A subsequent increase in temperature will release the hydrogen trapped in the spheres. Microspheres have the potential to be very safe, resist contamination, and contain hydrogen at a low pressure increasing the margin of safety.
DERA's info:
W.J.Schaffer have claimed capacities of > 10 % - pressures of 10,000 psi - permeable to H 2 at high temperatures (> 200 o C) - impermeable at room temperature - spheres produced by a single drop process - slow, expensive
DERA tested commercial glass microspheres - average particle size 6 - 75 mm - capacity of 0.9 wt % @ 1000 psi - would equal 5.9 % @ 10,000 psi - unfortunately most spheres broke > 3000 psi
Conclusions - Commercial spheres not suited to H2 storage- Need perfect spheres, no defects
A powder of an alloy of lanthanum with cobalt and samarium with nickel is able to absorb under the pressure of 0.4 MPa (4 atm) such amount of hydrogen, which was able to store in the same vessel but under the pressure of 100 MPa (1000 atm).
Glass Microspheres
Tiny hollow glass spheres can be used to safely store hydrogen. The glass spheres are warmed, increasing the permeability of their walls, and filled by being immersed in high-pressure hydrogen gas. The spheres are then cooled, locking the hydrogen inside of the glass balls. A subsequent increase in temperature will release the hydrogen trapped in the spheres. Microspheres have the potential to be very safe, resist contamination, and contain hydrogen at a low pressure increasing the margin of safety.
DERA's info:
W.J.Schaffer have claimed capacities of > 10 % - pressures of 10,000 psi - permeable to H 2 at high temperatures (> 200 o C) - impermeable at room temperature - spheres produced by a single drop process - slow, expensive
DERA tested commercial glass microspheres - average particle size 6 - 75 mm - capacity of 0.9 wt % @ 1000 psi - would equal 5.9 % @ 10,000 psi - unfortunately most spheres broke > 3000 psi
Conclusions - Commercial spheres not suited to H2 storage- Need perfect spheres, no defects
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