European energy policy has resulted in the increased integration of renewable energy sources.The growth of renewable energy also results in volatile energy production and brings us specific advantages but also challenges.This is mainly the case with solar– and wind energy. In some cases, the supply of energy for renewable energy sources is higher than demand.This could lead to disruptions in the energy systems.
The surplus energy is converted to hydrogen via the electrolysis process, a decomposition process in which electrical energy is the main driving force for chemical reactions. In the electrolysis process, a voltage and a direct current are applied to water, what causes dissociation of water molecules into the product gases hydrogen and oxygen. Electrolysis has thus the potential to transform sustainable electrical energy into green hydrogen. The produced hydrogen can be used in different applications.
It can be injected into the natural gas grid (Power-to-Gas: in the form of hydrogen of synthetic natural gas), it can be converted back to electricity (Power-to-Power) ,it can be used for mobility purposes as for hydrogen cars or low carbon fuels (Power-to-Mobility) or even as a way to decarbonize the chemical sector (Power-to-Chemicals).