The Hydrogen Color Spectrum: Techno-Economic Analysis of the Available Technologies for Hydrogen Production

Hydrogen has become the most promising energy carrier for future. The spotlight is now on green hydrogen, produced with water electrolysis powered exclusively by renewable sources. However, several other technologies and sources are available or under development to satisfy current future hydrogen demand. In fact, production involves different resources loads, depending method used. Therefore, industry tried set a classification code this carrier. This done using colors that reflect method, consumed produce required energy, number of emissions generated during process. Depending reviewed literature, some have slightly definitions, thus making classifications imprecise. techno-economic analysis clarifies meaning each color systematically reviewing their methods, sources, emissions. Then, an economic assessment compares costs various examines feasible ones potential evolution. scientific community industry’s clear understanding advantages drawbacks element spectrum essential step toward reaching sustainable economy.