An experimental campaign on a Molten Carbonate Electrolyser (MCEC) operating with different water concentrations

This study investigates the performance of a Molten Carbonate Electrolyser Cell for Hydrogen production Carbon Dioxide conversion. Operating at 650◦C with a molten carbonate electrolyte, the experimental campaign evaluates polarisation behaviour and efficiency under varying Water concentrations (e.g., 10%, 40%, and 60%) at the fuel electrode. Results demonstrate that increasing Water content enhances ionic conductivity, reduces ohmic and activation losses, and improves Hydrogen production. Polarisation curves reveal a downward shift with higher Water content, while efficiency curves show values exceeding unity due to the thermal contribution from the high operating temperature. These findings provide valuable insights into the MCEC performance for sustainable Hydrogen production and Carbon Dioxide conversion in integrated energy systems. Future work will focus on assessing long-term stability under different operational conditions.