Carbon dioxide emissions from fossil fuel power plants are considered among the main reasons for the greenhouse effect. Various technologies have been developed to capture CO2 from power plants, but they require a considerable consumption of energy, penalizing the plant. Molten Carbonate Fuel Cell (MCFC) technology can play an important role in CO2 capture, thanks to the operating principle based on the electrochemical reaction, through the carbonate ions CO32-, in which electricity is generated. The production of energy makes this capture system "active" thus avoiding the energy consumption typical of passive systems. The MCFC has two advantages in carbon capture: the cell removes CO2 fed at the cathode to promote carbonate ion transport across the electrolyte and any dilution of the oxidized products is avoided.