TY - JOUR
T1 - Simultaneous generation of synthesis gas and electric power by internal reforming fuel cells utilizing LaGaO3 based electrolytes
AU - Yamada, Takashi
AU - Hiei, Yoshiko
AU - Akbay, Taner
AU - Ishihara, Tatsumi
AU - Takita, Yusaku
N1 - Funding Information:
A part of this study was financially supported by Kajima Research Foundation and Proposal-Based R&D Program of New Energy and Industrial Technology Development Organization (NEDO).
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 1998/12/1
Y1 - 1998/12/1
N2 - A novel solid oxide fuel cell (SOFC) utilizing partial oxidation of methane (CH4 + 1/202 = CO + 2H2) as internal reforming reaction was investigated in the present study. Large electric power as well as CO-H2 mixture with molar ratio of 2 were obtained by applying LaGaO3 perovskite as electrolyte. Although the open circuit potential decreased, the maximum power density increased by doping a small amount of Co to the LaGaO3 electrolyte. In particular, the increase in the power density at 1073 K was significant. Increasing the amount of doped Co monotonically enhanced the hole conduction resulting in a decrease in the open circuit potential and an increase on the amount of leaked oxygen which results in diminished electric power. Consequently, it became clear that the optimized composition for this electrolyte was La0.9Sr0.1Ga0.8Mg0.115Co 0.085O3 considering the power density and the amount of oxygen leakage. Although the thickness of electrolyte with the above composition was as thick as 0.5 mm, a maximum power density and yield of synthesis gas were obtained at 242 mW/cm2 and 16%, respectively at 1073 K.
AB - A novel solid oxide fuel cell (SOFC) utilizing partial oxidation of methane (CH4 + 1/202 = CO + 2H2) as internal reforming reaction was investigated in the present study. Large electric power as well as CO-H2 mixture with molar ratio of 2 were obtained by applying LaGaO3 perovskite as electrolyte. Although the open circuit potential decreased, the maximum power density increased by doping a small amount of Co to the LaGaO3 electrolyte. In particular, the increase in the power density at 1073 K was significant. Increasing the amount of doped Co monotonically enhanced the hole conduction resulting in a decrease in the open circuit potential and an increase on the amount of leaked oxygen which results in diminished electric power. Consequently, it became clear that the optimized composition for this electrolyte was La0.9Sr0.1Ga0.8Mg0.115Co 0.085O3 considering the power density and the amount of oxygen leakage. Although the thickness of electrolyte with the above composition was as thick as 0.5 mm, a maximum power density and yield of synthesis gas were obtained at 242 mW/cm2 and 16%, respectively at 1073 K.
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U2 - 10.1016/s0167-2738(98)00289-6
DO - 10.1016/s0167-2738(98)00289-6
M3 - Article
AN - SCOPUS:0032307950
VL - 113-115
SP - 253
EP - 258
JO - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
ER -