Steam reforming on Ni-samaria-doped ceria cermet anode for practical size solid oxide fuel cell at intermediate temperatures |
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Authors: | Mitsunobu Kawano Toshiaki Matsui Ryuji Kikuchi Hiroyuki Yoshida Toru Inagaki Koichi Eguchi |
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Affiliation: | 1. Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan;2. Energy Use R&D Center, The Kansai Electric Power Co., Inc., 11-20 Nakoji 3-chome, Amagasaki, Hyogo 661-0974, Japan |
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Abstract: | Direct internal and external reforming operations on Ni-samaria-doped ceria (SDC) anode with the practical size solid oxide fuel cell (SOFC) at intermediate temperatures from 600 to 750 °C are carried out to reveal the reforming activities and the electrochemical activities, being compared with the hydrogen-fueled power generation. The cell performance with direct internal and external steam reforming of methane and their limiting current densities were almost the same irrespective of the progress of reaction in the methane reformate at 700 and 750 °C. The durability test for 5.5 h at 750 °C with direct internal reforming operation confirmed that the cell performance did not deteriorate. The operation temperature of the cell controlled the reforming activities on the anode, and the large size electrode gave rise to high conversion due to the slow space velocity of the steam reforming. Direct internal steam reforming attained sufficient level of conversion for SOFC power generation with methane at 700 and 750 °C on the large Ni-SDC cermet anode. |
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Keywords: | Solid oxide fuel cell Methane Steam reforming Ni-samaria-doped ceria Intermediate temperature |
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