Effect of strontium and zirconium doped barium cerate on the performance of proton ceramic electrolyser cell for syngas production from carbon dioxide and steam |
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| Affiliation: | 1. Department of Chemical Engineering, Mahidol University, Nakorn Pathom 73170, Thailand;2. National Metal and Materials Technology Center (MTEC), Thailand Science Park (TSP), Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani 12120, Thailand;3. PTT Research & Technology Institute, PTT Public Company Limited, Thailand;4. The Joint Graduate School of Energy and Environment, King Mongkut''s University of Technology Thonburi, Bangkok 10140, Thailand;5. Center of Excellence in Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand;6. The Sirindhorn International Thai-German Graduate School of Engineering, King Mongkut''s University of Technology North Bangkok, Bangkok 10800, Thailand;1. China University of Petroleum (East China), Qingdao 266580, China;2. Research Institute of Petroleum Engineering of Shengli Oilfield, Sinopec, Dongying 257000, China;3. Shanghai Witsun Jetdrill Enhancement Services Co., Ltd, Shanghai 200000, China;4. Well Testing Company of CNPC Daqing Oilfield, Daqing 163000, China;1. School of Chemical Science and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia;2. Faculty of Science and Technology, Universiti Sains Islam Malaysia, Bandar Baru Nilai, 71800, Nilai, Negeri Sembilan, Malaysia;3. School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA, Cawangan Negeri Sembilan, Kampus Kuala Pilah, Pekan Parit Tinggi, 72000 Kuala Pilah, Negeri Sembilan, Malaysia;4. Centre for Defence Foundation Studies, Universiti Pertahanan Nasional Malaysia, Kem Sungai Besi, 57000 Kuala Lumpur, Malaysia;1. Hochiminh City University of Natural Resources and Environment (HCMUNRE), Viet Nam;2. Ho Chi Minh City University of Technology (HCMUT), Viet Nam;3. NTT Institute of Hi-Technology, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam;4. Universiti Malaysia Pahang, Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang, Malaysia;1. Engineering Research Center of Nano-Geo Materials of Ministry of Education, Department of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan, 430074, China;2. School of Energy and Environment, Southeast University, No.2 Si Pai Lou, Nanjing 210096, China;3. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Faculty of Physics and Electronic Science, Hubei University, Wuhan, Hubei 430062, PR China;1. Department of Chemistry, University of Liverpool, Liverpool, L69 3BX, United Kingdom;2. Department of Materials, Imperial College London, London, SW7 2BX, United Kingdom;3. Materials Science and Engineering Program & Texas Materials Institute, University of Texas at Austin, Austin, Texas 78712, United States;4. School of Environment Science and Engineering, Nanjing University of Information Science and Technology (NUIST), Nanjing, 210044, PR China;5. School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea |
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| Abstract: | Syngas has been produced from carbon dioxide (CO2) and steam using a proton ceramic electrolyser cell. Proton-conducting electrolytes which exhibit high conductivity can suffer from low chemical stability. In this study, to optimize both proton conductivity and chemical stability, barium cerate and doped barium cerate are synthesized using solid state reaction method: BaCeO3 (BC), Ba0.6Sr0.4CeO3-α (BSC), Ba0.6Sr0.4Ce0.9Y0.1O3-α (BSCY), and BaCe0.6Zr0.4O3-α (BCZ). The BC, BSC, and BSCY are calcined at 1100 °C for 2 h and BCZ is calcined at 1300 °C for 12 h, respectively. All samples exhibit 100% perovskite and crystallite sizes equal 37.05, 28.46, 23.65 and 17.46 nm for BC, BSC, BSCY and BCZ, respectively. Proton conductivity during steam electrolysis as well as catalytic activity toward the reverse water gas shift reaction (RWGS) is tested between 400 and 800 °C. The conductivity increases with temperature and the values of activation energy of conduction are 64.69, 100.80, 103.78 and 108.12 kJ mol−1 for BSCY, BC, BSC, and BCZ, respectively. It is found that although BCZ exhibits relatively low conductivity, the material provides the highest CO yield at 550–800 °C, followed by BSCY, BSC, and BC, correlating to the crystallite size and BET surface area of the samples. Catalytic activity toward RWGS of composited Cu and electrolytes is also measured. Additional Cu (60 wt%) significantly increases catalytic activity. The CO yield increases from 3.01% (BCZ) to 43.60% (Cu/BCZ) at 600 °C and CO can be produced at temperature below 400 °C. There is no impurity phase detected in BCZ sample after exposure to CO2-containing gas mixture (600 °C for 5 h) while CeO2 phase is detected in BSC and BSCY and both CeO2 and BaO are observed in BC sample. |
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| Keywords: | Barium cerate Barium zirconate Proton ceramic electrolyser Solid oxide fuel cell Carbon dioxide conversion |
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