Electrode performance of a novel molten carbonate fuel cell anode using a fluidized-bed electrode

The electrode performance of a molten carbonate fuel cell anode using fluidized-bed electrode has been examined experimentally. A fluidized-bed electrode half-cell of 42 mm inside diameter and 500 mm in height was used with an air/CO2/gold reference electrode at 923 K. Nickel particles combined with a nickel plate current collector were employed as the working electrode. Fuel gas containing H2S with levels of 5-200 ppm was fed into the working electrode at a velocity of 7.7 mm/s. Steady-state polarization curves were measured potentiostatically using a potentiostat. Degradation of electrode performance by H2S in the fuel gas was studied at various concentration of H2S. It was found that the fluidized-bed electrode MCFC can tolerate high level of H2S for a long period of operation time.