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Post by Ratty on Oct 30, 2018 13:06:58 GMT
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Post by nautonnier on Oct 30, 2018 18:54:45 GMT
This one comes up quite often - the main problems are: * Energy Returned on Energy Invested (EROI) is very very poor lots of energy required. * Storage very difficult Hydrogen will leak through many materials including metals. * Low energy density |
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Post by douglavers on Oct 30, 2018 21:20:19 GMT
This is a really bad idea.
As mentioned, many metals are porous to hydrogen, and it requires a rather low temperature to liquify [33degK]. It has a large flammability range. Producing and purifying it is a an energy intensive process, liquefying even more so as it requires significant pre-cooling. BTW, a good way to make really pure hydrogen is to let it diffuse [rather quickly] through a palladium membrane.
Much better to attach it to a carbon atom [hydrocarbons] or a nitrogen atom [ammonia] to make it safe to handle!!
A long tine ago, I used what is called a cryotip to liquefy hydrogen on a tiny scale - but that had to be immersed in liquid nitrogen to work, otherwise expanding hydrogen through a fine nozzle causes it to heat rather than cool.
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