Some points about the storage of hydrogen

Objective 2015 Objective 2010 Chemical hydride Complex hydride Liquid hydrogen Pressurized gas (700 bars) Pressurized gas (350 bars) 

We see the reaffirmation of a known result, which is that storage at 700 bar pressure efficiencies have similar performances to those of cryogenic storage. The performances of the chemical hydride are not far behind either. 

Let us now revisit the case of hydrogen production by water electrolysis. 

When pressurized storage is chosen for the gases produced, the ideal is for the operational pressure of the electrolyzer to be as close as possible to the desired storage pressure. This enables us to minimize the energy necessary for the mechanical compression required by the compressor. 

If we do not wish to store oxygen, the metal-hydride solution is a competitive solution which offers better safety than pressurized storage, particularly in stationary applications where there is no problem of weight. However, this comes at the cost of increased complexity. 

---