HIGH-TEMPERATURE ELECTROCHEMICAL SEPARATION OF CARBON-DIOXIDE USING MOLTEN-CARBONATE

The electrochemical separation and concentration of CO2 at high temper ature (923 K) were studied using molten carbonate as the electrolyte. An electrolysis system was examined in the present study since a molte n carbonate fuel cell had already demonstrated the concentration of CO 2. Maximum concentration of CO2 after electrolysis using molten carbon ate was 67%, as determined by electrolysis using Li/K molten carbonate and Lithiated NiO as the cathode and anode, respectively. The cell vo ltage was 220 mV at a current density of 100 mA/cm(2). These results s how that the separation and concentration of CO2 by electrolysis proce ed smoothly and theoretically. This method is expected to be applicabl e to CO2 and O-2 recovery processes.