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Evaluation of Electric Power of SOFC Using Reformed Biogas

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Abstract:

Biogas of about 60 % CH4 -40% CO2 composition is produced from waste food or drainage. Electrochemical reforming of CH4 with CO2 using a porous gadolinium-doped ceria (GDC) cell is an attractive process to produce a H2-CO fuel used in solid oxide fuel cell. The supplied CO2 is converted to CO and O2- ions by the reaction with electrons at cathode (CO2 + 2e- → CO + O2-). The produced CO and O2- ions are transported to the anode through a porous mixed conductor GDC electrolyte. In the anode CH4 reacts with O2- ions to produce CO, H2 and electrons (CH4 + O2- → CO + 2H2 + 2e-). This process suppresses the carbon deposition from CH4. The formed H2 and CO fuels were supplied to a solid oxide fuel cell with dense GDC electrolyte (Ce0.8Gd0.2O1.9). The open circuit voltage and maximum power density were measured for the reformed gas and for a pure H2 fuel. Little difference in the electric power was measured at 1073 K for both the fuels.

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Periodical:

Materials Science Forum (Volume 761)

Pages:

11-14

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.761.11

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Online since:

July 2013

Authors:

Naoki Furukawa, Yoshihiro Hirata, Soichiro Sameshima, Naoki Matsunaga

Keywords:

Biogas Reforming, Open Circuit Voltage, Power Density, Solid Oxide Fuel Cell (SOFC)

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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