Various options are possible for this; from underground storage facilities to the existing natural gas network to new technologies.
Helmholtz scientists are investigating the advantages and disadvantages of underground storage sites and natural gas storage facilities for the safe storage of hydrogen. The natural gas network is also suitable for transporting gaseous hydrogen. However, hydrogen can also be stored in solids. When heated, these so-called hydride stores release the hydrogen again.
Another possibility is that hydrogen can react with unsaturated organic compounds to form an energy-rich liquid ("liquid organic hydrogen carrier," or LOHC) that can be stored or transported in a similar way to crude oil. It can be transported safely by tankers and trains.
Helmholtz researchers are further developing such hydride storage and LOHC technologies.