Hydrogen Storage
Filter, valves & fittings
on MH cylinder
In the photo at right, the cylinder is shown with a pressure relief valve, filter, shut-off and isolation valve, a supply line for hydrogen, and a vacuum line to evacuate the cylinder during "rinsing" steps.
The first MH activation attempt involved heating the cylinder by wrapping electrical heating tape around the cylinder as shown in the photo below. The highest temperature achievable without melting the heating tape insulation was 182°C (360°F) during the "rinse" steps with medium pressure hydrogen filling followed by vacuum pumping.
The pressure applied was 13
to 34.5 bar (190 to 500
psig) during the last step
of the procedure. No
activation occurred. We
believe this was because
