Electrochemical Reduction of Iron Oxide - Produced from Iron Combustion - for the Valorization of Iron Fuel Cycle

Iron is a prospective candidate for energy carriers in the transition era with high density. In this concept, released by combustion of iron powder whilst solid product - oxide can be collected and reduced back to metallic iron, forming recyclable fuel cycle. The electrochemical technique considered suitable reduction method as it has attractive aspects including low electric consumption, temperature, direct usage renewable energy, short process chain. study, performance electrodeposition investigated using an electrolysis cell containing suspension micron-sized combusted aqueous NaOH (50%wt, 18 M) at temperature 110°C. parallel plate electrolyzer used these experiments consists stainless-steel (cathode) nickel gauze (anode). effects imposed varying current density, composition, particle diameter on Faradaic efficiency yield are evaluated. Additional rotating disc electrode (RDE) also conducted determine system's diffusion coefficient under different operating conditions. Generally, cathodic deposition successfully achieved morphology deposited depends operation conditions density heterogeneity flow system. obtained results open new perspectives efficient cost-effective production/regeneration. Figure 1