Two-step hydrogen chloride cycle for sustainable hydrogen production: An energy and exergy assessment |
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| Affiliation: | 1. Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan 320, Taiwan;2. Hierarchical Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University, Tainan 70101, Taiwan;3. Department of Materials Science and Engineering, National Central University, Taoyuan 320, Taiwan;4. Institute of Materials Science and Engineering, Department of Mechanical Engineering, National Central University, Taoyuan 320, Taiwan;1. School of Power and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China;2. The State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou, 310027, China;3. Qilu University of Technology, The Institute of Oceanographic Instrumentation, Qingdao, 266001, China;1. Department of Mechanics, Tianjin University, Tianjin 300072, China;2. Tianjin Key Laboratory of Nonlinear Dynamics and Control, Tianjin 300072, China;1. Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin 300384, China;2. National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin 300384, China;3. Guangdong Key Laboratory of Intelligent Transportation System, School of Intelligent Systems Engineering, Sun Yat-sen University, Guangzhou 510275, China;4. School of Engineering, University of Dayton, Dayton 45469, USA;5. College of Transportation, Jilin University, Changchun 130025, China;1. Faculty of Engineering, University of Alberta, Edmonton, AB T6G 2G8, Canada;2. Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John’s, NL A1B 3X5, Canada;3. Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, Oshawa, ON L1H 7K4, Canada |
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| Abstract: | In this study, we present the thermodynamic feasibility analysis of a two-step hydrogen chloride cycle for sustainable hydrogen production. Exergy approach in addition to conventional energy approach is utilized to study the performance of the cycle. Here, a solid oxide membrane for the gas phase electrolysis of hydrogen chloride is employed and the temperature change between the cycle steps is eliminated for better thermal management. Moreover, a parametric study is conducted to observe the cycle variation with certain parameters such as operating temperature, current density, and hydrogen production rate. The calculated results show that with the use of the current cycle, one can produce 1 kg/s of hydrogen with the consumption of 335.8 MW electricity and 29.2 MW of thermal energy. Additionally, two different definitions of energy and exergy efficiencies are introduced to investigate the difference between actual and ideal (theoretical) cycle performances. The proposed cycle can be effectively used to produce hydrogen using concentrated solar and nuclear waste heat at high temperatures. |
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| Keywords: | Hydrogen production Two-step High temperature electrolysis Hydrogen chloride Energy Exergy |
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