Hydrogen is a bad idea because it is dangerous (highly explosive) and also leaky, due to the size of the atom
To transport hydrogen, you need complex infrastructure (real cold trunk or whatever) and you still leak, so the overall efficiency is bad
To transport hydrogen, you need complex infrastructure (real cold trunk or whatever) and you still leak, so the overall efficiency is bad
https://www.engineeringtoolbox.com/explosive-concentration-l...
Becuse of hydrogen embrittlement you have to be carefull with material selection for pipes, storage tanks holding hydrogen. This not a big problem, but it means old pipes used for natural gas can not be used for hydrogen.
Germany is planing a hydrogen pipeline network.