Performance of Solid Oxide Fuel Cells with Direct Internal Reforming of Methane Kim, Young Jin; Lim, Hyung-Tae;
Performance of solid oxide fuel cells (SOFCs), in comparison with that under hydrogen fuel, were investigated under direct internal reforming conditions. Anode supported cells were fabricated with an Ni+YSZ anode, YSZ electrolyte, and LSM+YSZ cathode for the present work. Measurements of I-V curves and impedance were conducted with S/C (steam to carbon) ratio of ~ 2 at . The outlet gas was analyzed using gas chromatography under open circuit condition; the methane conversion rate was calculated and found to be ~ 90% in the case of low flow rate of methane and steam. Power density values were comparable for both cases (hydrogen fuel and internal steam reforming of methane), and in the latter case the cell performance was improved, with a decrease in the flow rate of methane with steam, because of the higher conversion rate. The present work indicates that the short-term performance of SOFCs with conventional Ni+YSZ anodes, in comparison with that under hydrogen fuel, is acceptable under internal reforming condition with the optimized fuel flow rate and S/C ratio.
K. Nikooyeh, A. A. Jeje, and J. M. Hill, "3D Modeling of Anode-supported Planar SOFC with Internal Reforming of Methane," J. Power Sources, 171  601-9 (2007).
T. Iida, M. Kawano, T. Matsui, R. Kikuchi, and K. Eguchi, "Internal Reforming of SOFCs Carbon Deposition on Fuel Electrode and Subsequent Deterioration of Cell," J. Electrochem. Soc., 154  B234-41 (2007).
M. Kawano, T. Matsui, R. Kikuchi, H. Yoshida, T. Inagaki, and K. Equchi, "Direct Internal Steam Reforming at SOFC Anodes Composed of NiO-SDC Composite Particles," J. Electrochem. Soc., 154  B460-65 (2007).
Y. Tabata, H. Orui, K. Watanabe, R. Chiba, M. Arakawa, and Y. Yamazaki, "Direct Internal Reforming Characteristics of SOFC with a Thin SASZ Electrolyte and a LNF Cathode," J. Electrochem. Soc., 151  A418-21 (2004).
J. Liu and S. A. Barnett, "Operation of Anode-supported Solid Oxide Fuel Cells on Methane and Natural Gas," Solid State Ionics, 158  11-6 (2003).
J. M. Klein, M. Henault, P. Gelin, Y. Bultel, and S. Georges, "A Solid Oxide Fuel Cell Operating in Gradual Internal Reforming Conditions under Pure Dry Methane," Electrochem. Solid-State Lett., 11  B144-47 (2008).
J.-H. Koh, B.-S. Kang, H. C. Lim, and Y.-S. Yoo, "Thermodynamic Analysis of Carbon Deposition and Electrochemical Oxidation of Methane for SOFC Anodes," Electrochem. Solid-State Lett., 4  A12-15 (2001).
S. Park, J. M. Vohs, and R. J. Gorte, "Direct Oxidation of Hydrocarbons in a Solid-Oxide Fuel Cell," Nature, 404 265- 67 (2000).
S. Park, R. Craciun, J. M. Vohs, and R. J. Gorte, "Direct Oxidation of Hydrocarbons in a Solid Oxide Fuel Cell: I. Methane Oxidation," J. Electrochem. Soc., 146  3603-5 (1999).
R. J. Gorte, J. M. Vohs, and S. McIntosh, "Recent Developments on Anodes for Direct Fuel Utilization in SOFC," Solid State Ionics., 175  1-6 (2004).
A. L. Dicks, K. D. Pointon, and A. Siddle, "Intrinsic Reaction Kinetics of Methane Steam Reforming on a Nickel/Zirconia Anode," J. Power Sources, 86  523-30 (2000).
S. C. Singhal and K. Kendall, "High Temperature Solid Oxide Fuel Cell: Fundamentals, Design and Applications," Elsevier, Oxford, 2004.
T. Takeguchi, R. Kikuchi, T. Yano, K. Eguchi, and K. Murata, "Effect of Precious Metal Addition to Ni-YSZ Cermet on Reforming of CH4 and Electrochemical Activity as SOFC Anode," Catal. Today, 84  217-22 (2003).
K. P. Recknagle, E. M. Ryan, B. J. Koeppel, L. A. Mahoney, and M. A. Khaleel, "Modeling of Electrochemistry and Steam-methane Reforming Performance for Simulating Pressurized Solid Oxide Fuel Cell Stacks," J. Power Sources, 195  6637-44 (2010).
H.-T. Lim, C. Yang, S. C. Hwang, and Y.-J. Choi, "Experimental Study of Internal Reforming on Large-area Anode Supported Solid Oxide Fuel Cells," Fuel Cells, in press.
H.-T. Lim, S. C. Hwang, and J. S. Ahn, "Performance of Anode-supported Solid Oxide Fuel Cell in Planar-cell Channel-type Setup," Ceram. Int., 39 S659-62 (2013).