Combined methane reforming by carbon dioxide and steam in proton conducting solid oxide fuel cells for syngas/power co-generation |
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| Affiliation: | 1. Institute of Deep Earth Sciences and Green Energy, Shenzhen University, Shenzhen, 518060, China;2. Building Energy Research Group, Department of Building and Real Estate, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;3. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, PR China;4. College of Light Industry and Chemical Engineering, Guangdong University of Technology, Guangzhou, 510006, China;5. Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong, China;1. School of Physical and Materials Science, Anhui University, No.111 Jiulong Road, Hefei, 230601, China;2. Institute of Molecular Science, Shanxi University, No.92 Wucheng Road, Taiyuan, 030006, China;3. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, No.5 Xin Mofan Road, Nanjing, 210009, China;4. Department of Chemical Engineering, Curtin University, Perth, Western Australia, 6845, Australia;1. Faculty of Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan;2. International Institute for Carbon-Neutral Energy Research (WPI), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan;3. Next-Generation Fuel Cell Research Center, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan;4. Faculty of Agriculture, Kyushu University, Hakozaki 6-10-1, Higashi-ku, Fukuoka 812-8581, Japan;5. International Research Center for Hydrogen Energy, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan;1. School of Environment Engineering, Nanjing Institute of Technology, 211167 Nanjing, China;2. Department of Energy Technology, Royal Institute of Technology (KTH), S-10044 Stockholm, Sweden;3. Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC) & Jiangsu Joint Laboratory of Atmospheric Pollution Control (APC), School of Environmental Sciences and Engineering, Nanjing University of Information Science and Technology;1. School of Power and Mechanical Engineering, Wuhan University, Wuhan, Hubei Province, PR China;2. Department of Mechanical Engineering, University of South Carolina, Columbia, USA;3. College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, Shandong Province, PR China;4. Department of Building and Real Estate, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, PR China;5. Tsinghua Innovation Center in Dongguan, Guangdong, 523808, PR China |
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| Abstract: | Methane and carbon dioxide mixture can be used as the fuel in a proton conducting solid oxide fuel cell (SOFC) for power/syngas co-generation and greenhouse gas reduction. However, carbon deposition and low conversion ratio are potential problems for this technology. Apart from using functional catalytic layer in the SOFC to enhance CH4 dry reforming, adding H2O into the fuel stream could facilitate the CH4 conversion and enhance the co-generation performance of the SOFC. In this work, the effects of adding H2O to the CO2 CH4 fuel on the performance of a tubular proton conducting SOFC are studied numerically. Results show that the CH4 conversion is improved from 0.830 to 0.898 after adding 20% H2O to the anode. Meanwhile, the current density is increased from 2832 A m?2 to 3064 A m?2 at 0.7 V. Sensitivity studies indicate that the H2:CO ratio can be effectively controlled by the amount of H2O addition and the H2 starvation can be alleviated, especially at high current density conditions. |
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| Keywords: | Steam reforming Dry methane reforming Syngas Modelling Solid oxide fuel cells Proton conducting |
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