ABSTRACT
Numerous excellent reviews on various methods for hydrogen production from water are reported in the literature. They examined different methods of hydrogen productions, energy efficiencies of various methods, economics of various alternatives, and use of solar energy for hydrogen productions. A high-temperature electrolysis (HTE) process may be favorable when high-temperature heat is available as waste heat from other processes. The use of such waste heat makes the overall process cost efficient. More research into HTE and high-temperature nuclear reactors may eventually lead to hydrogen supply that is cost competitive with natural gas steam reforming. This concept of coupling a high-temperature electrolyzer and a high-temperature gas-cooled nuclear reactor has been demonstrated in a laboratory but not at a commercial scale, although Idaho National Laboratory is developing a commercial process based on this concept.
