Construction of fuel reformer using proton conducting oxides electrolyte and hydrogen-permeable metal membrane cathode |
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| Affiliation: | 1. Research Institute, Chiba Institute of Technology, Narashino 275-0016, Japan;2. Department Materials Development, JAERI, Takasaki 370-1292, Japan;3. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;1. Dept.of Energy Planning & Design, Tsinghua Planning & Design Institute, Beijing, China;2. Laboratory of Ergonomics and Environmental Control, School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing, China;3. School of Architecture, Tsinghua University, Beijing, China;1. CIEMAT, Combustion and Gasification Division, Avenida Complutense, 40, 28040 Madrid, Spain;2. Energy Research Center of the Netherlands, P.O. Box 1, 1755 ZG Petten, The Netherlands;1. Department of Organic Synthesis, University of Chemical Technology and Metallurgy, 8 Kliment Ohridsky Str., 1756 Sofia, Bulgaria;2. Chemistry Department, Faculty of Sciences, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia;3. Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia;1. Center of Excellence in Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand;2. Department of Mechanical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand;3. Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand;4. Department of Chemical Engineering, Faculty of Engineering, Nagoya University, Chikusa-ku, Nagoya-shi, Aichi 464-8603, Japan;5. PTT Group Frontier Research Center, PTT Public Company Limited, Bangkok 10900, Thailand;1. Chemistry Department, University of Education, The University of DaNang, Ton Duc Thang 459, Da Nang, Viet Nam;2. Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium;3. Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, Box 901, 3000 Leuven, Belgium;4. Belarusian State Technological University, Physics Department, Sverdlov Str., 13a, Minsk 220006, Belarus |
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| Abstract: | We constructed a reformer of methane based on an electrochemical principle. This apparatus consists of the proton conducting ceramics electrolyte and the hydrogen-permeable metal membrane cathode. For methane reforming, a mixture of methane and oxygen gas is supplied to the porous Ag cathode. The hydrogen ions, which formed by the anode reaction: CH4 + O2 → CO2 + 4H+ + 4e?, are transported through the proton conducting ceramics to the cathode. Then, the hydrogen is formed at the cathode by the reaction: 4H+ + 4e? → 2H2. The hydrogen, which permeates through the metal membrane cathode, is 100% purity.The hydrogen separation ability of the reformer was investigated at 400–650 °C by measuring the electric current through the proton conducting oxide electrolyte. Since the ionic transport number of the proton conducting oxide is nearly unity, the current through the electrolyte corresponds to the proton flux through the electrolyte.The current measurements showed that the extracted proton flux through the electrolyte increased with increasing the applied voltage as well as temperature as we expected. However, the current measurements under the low voltage revealed that the extracted current was lesser than the expected value from Ohm's law. The decrease of the current is possibly caused for the reduction of the effective voltage by the anode polarization. In order to separate the hydrogen with higher efficiency, the applied voltage must be as low as possible using the thinner electrolyte and the improved anode. |
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