Hydrogen as Energy Carrier

Hydrogen will become a crucial energy vector and the other leg of the energy transition alongside renewable electricity by replacing coal, oil, gas, and conventional hydrogen across different segments of the economy. Hydrogen versatility as energy carrier is underlined as a key actor in decarbonization. His capability of storage energy during renewables production peaks is a crucial factor of its potential introduction in many civil and industrial sectors. Obviously, this depends on its “color” that influence the new acceptability because of the major or minor weight of traditional carbon sources. The chapter largely describes the physical and chemical properties of hydrogen as energy carrier. Hydrogen storage in innovative materials is reviewed as a great solution for large-scale production. In this chapter, the production routes based on hydrocarbons or clean sources are reviewed and compared. As a matter of fact, the role of temperature and pressure is deeply highlighted.