Hydrogen Storage
Filling a cylinder
with alloy
scf), weighed 3.6 kg (8 lbs) and carried a DOT rating of 3AA 145 bar (2100 psig). A rupture-disk rated at 139 bar (2000 psig) is installed in the brass cap.
The copper washer used to seal the cylinder cap was wet-polished with fine emery paper and then coated on both sides with a thin film of Permatex Ultra Copper Hi-Temp RTV Silicone Gasket P/N 101B, just before re-assembly. We loaded the cylinder with 6.8 kg (15 lbs) of Hydralloy C, about two-thirds full, to conservatively allow for more than 18% expansion of the alloy, expected after activation.
CO2 cylinder to be converted
to H2 storage in metal hydride.
The cylinder components (cap, particle filter, isolation valve, thermocouple, pressure relief valve, rupture-disk, and pressure gauge) worked fine, but our first activation procedure did not work.
