Molten carbonate fuel cells are natural CO2 separators and concentrators. In this work we analyze a single MCFC behavior feeds with a mixture simulating a cogeneration power plant exhaust gas, so to replicate the coupling with a real plant. The main aim of this work is to understand the MCFC performances, its capability and efficiency to separate CO2, its dependence from critical parameters such as the cathodic carbon dioxide concentration (XCO2) and utilization (UCO2), as well as the partial pressure ratio between oxygen and carbon dioxide (PO2/PCO2) in addition to other derived parameters as the oxygen concentration (XO2), utilization (UO2) and the total cathodic flow rate (Qcat). In particular, in the cathodic section, the carbon dioxide concentration is critical at low values and can both induce quick voltage drop and make the cell sensitive to the other parameters otherwise not so decisive.
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