Performance and long-term durability of direct-methane flat-tube solid oxide fuel cells with symmetric double-sided cathodes |
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| Affiliation: | 1. Jiangxi University of Science and Technology, Ganzhou, Jiangxi Province, 341000, PR China;2. Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, No.1219 Zhongguan West Road, Ningbo, Zhejiang Province, 315200, PR China;3. Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR China;4. Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China;5. Center for Fuel Cell Innovation, School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074 China;1. Department of Chemical Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang 37673, Republic of Korea;2. Institute of New and Renewable Energy, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang 37673, Republic of Korea;1. Università degli Studi di Perugia, Department of Engineering, Italy;2. Università degli Studi di Perugia, Department of Physics and Geology, Italy;3. Università degli Studi di Perugia, Department of Chemistry, Biology and Biotechnology, Italy;1. School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China;2. Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;3. Department of Building and Real Estate, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China;4. School of Science, Harbin Institute of Technology, Shenzhen 518055, China;1. Department of Renewable Energies, Niroo Research Institute, Tehran, Iran;2. Department of Engineering, University of Perugia, Via G. Duranti, Perugia 06100, Italy;1. State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment, Department of Energy and Power Engineering, Tsinghua University, Beijing, 100084, PR China;2. Tsinghua Innovation Center in Dongguan, Dongguan, Guangdong province, 523808, PR China |
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| Abstract: | In this work, we investigated the performance and stability of a large flat-tube SOFC with symmetric double-sided cathodes (DSC), which was directly fueled with methane. The effect of steam/carbon (S/C) ratio, temperature, and current density on the performance, and long-term stability of the DSC as well as the catalytic behavior of the anode was investigated in details. The thick anode support and inner channels of the DSC formed an efficient microreactor for steam-reforming of methane, resulting in high conversion rate of methane and CO selectivity. In particular, when the S/C was 2, the conversion of CH4 at 750 °C achieved 100% in the DSC and no carbon deposition was observed. Moreover, the voltage of DSC with was stable throughout 190 h under a discharge current density of 0.257 A cm?2. |
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| Keywords: | Symmetric structure with double-sided cathodes Internal reforming of methane Direct methane solid oxide fuel cells Carbon deposition Ni-yttria stabilized zirconia |
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