> If your hydrogen is under pressure, then simple containment failure can be the “spark” required. If the pressure is high enough[1], you don't even need to ig

> If your hydrogen is under pressure, then simple containment failure can be the “spark” required. If the pressure is high enough[1], you don't even need to ignite the hydrogen; pressurized gas storage experiencing catastrophic failure is a bomb. An explosion is rapidly expanding gas. Normally a chemical chain reaction[2] is used to generate that gas, but rupturing high pressure gas storage has very similar effects. Storing a lot of energy in a small space (high energy density) always includes the risk of that energy being released. > We shouldn’t short sell just how tricky hydrogen can be. Working with hydrogen directly is really problematic. However, an easy way to solves most of those problems is stabilizing the hydrogen by attaching it to a chain of carbon atoms. [1] The storage pressure probably is high enough or the design would have used much cheaper low pressure parts. [2] e.g. the common high explosives that store lots of single-bonded nitrogen as a solid and rapidly chain react into triple-bonded N2 gas and a lot of energy