Effects of carbon monoxide, carbon dioxide, and methane on nickel/yttria-stabilized zirconia-based solid oxide fuel cells performance for direct coupling with a gasifier. (24th August 2015)

• Record Type: Journal Article
• Authors: Lebreton, M.; Delanoue, B.; Baron, E.; Ricoul, F.; Kerihuel, A.; Subrenat, A.; Joubert, O.; Le Gal La Salle, A.
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 32(2015)
• Page Start: 10231
• Page End: 10241
• Publication Date: 2015-08-24
• Subjects: Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2015.06.009
• Languages: English
• ISSNs: 0360-3199

Abstract

<abstract xml:lang="en" abstract-type="author" id="abs0010"> <title id="sectitle0010">Abstract</title> <sec> <p id="abspara0010">This work focuses on the role of CO and CO<sub>2</sub> usually present in syngas generated by biomass gasification when they are flowed in a Ni-YSZ-based SOFC. Polarization, power versus intensity and electrochemical impedance spectroscopy measurements are performed and the theoretical aspect is enhanced with comparison with values of the Nernst potentials of the two H<sub>2</sub>O/H<sub>2</sub> and CO<sub>2</sub>/CO couples. The CO as electrochemical reactant is clearly highlighted, and also compared to H<sub>2</sub>. Indeed, power density values of 460 mW cm<sup>−2</sup> and 540 mW cm<sup>−2</sup> are obtained at 750 °C when the cell is fueled with a 50% CO–50% N<sub>2</sub> mixture and a 50% H<sub>2</sub>–50% N<sub>2</sub> mixture respectively, and the use of CO leads to higher power density values when the percentage of the fuel in the Fuel/N<sub>2</sub> mixture is lower than 27%, the use of higher amounts of CO inducing a large increase of the total resistance of the cell. The impact on the efficiency of the cell of the presence of CH<sub>4</sub> is also examined using electrochemical measurements. Finally, power density values of 502 mW cm<sup>−2</sup> is obtained at 750 °C when the cell is fueled with a 50% N<sub>2</sub>-20% CO-17% H<sub>2</sub>-10% CO<sub>2</sub>-3% CH<sub>4</sub> mixture which appears to a be a realistic composition corresponding to the exhaust of the gasifier.</p> </sec> </abstract>