Journal
JOURNAL OF POWER SOURCES
Volume 220, Issue -, Pages 74-78Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2012.07.106
Keywords
Solid oxide fuel cell (SOFC); Ni-based anodes; Ceria; Hydrocarbon; Carbon deposition
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We investigated direct butane power generation for microtubular solid oxide fuel cells with a diameter of less than 2 mm. Conventional Ni-stabilized zirconia anodes deteriorated rapidly over a period of 3-4 h at 610 degrees C and a low steam/carbon (S/C) ratio of 0.044 in butane due to a large amount of carbon deposition. For the Ni-Gd doped ceria (Ni-GDC) anode, the power could be generated continuously for more than 24 h at 610 degrees C and S/C = 0.044 in butane. The rate of carbon deposition for the Ni-GDC was slower than that for the Ni-stabilized zirconia at 610 degrees C. Ceria can be reduced from Ce4+ to Ce3+, which causes the suppression of carbon deposition on the Ni-GDC anode in butane at low humidity. (C) 2012 Elsevier B.V. All rights reserved.
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