E. Acha

13 – Hydrogen purification methods: Iron-based redox processes, adsorption, and metal hydrides

One of the keys in the possibility of employing hydrogen as an energy vector in the future is its purification. There are many techniques to purify hydrogen from a mixture, and these processes present different advantages and disadvantages. Therefore, there are many studies that develop new processes for hydrogen purification. This review summarizes the progress of some of them, as the most recent advances on redox reactions, metal hydrides, and adsorption for hydrogen purification. This review considers fundamental aspects including the thermodynamic and kinetic viewpoints, the potential of hydrogen purification processes, the main advantages and disadvantages to purify this hydrogen, the new materials employed in these processes, and the system design features.One of the keys in the possibility of employing hydrogen as an energy vector in the future is its purification. There are many techniques to purify hydrogen from a mixture, and these processes present different advantages and disadvantages. Therefore, there are many studies that develop new processes for hydrogen purification. This review summarizes the progress of some of them, as the most recent advances on redox reactions, metal hydrides, and adsorption for hydrogen purification. This review considers fundamental aspects including the thermodynamic and kinetic viewpoints, the potential of hydrogen purification processes, the main advantages and disadvantages to purify this hydrogen, the new materials employed in these processes, and the system design features.