Numerical study on carbon dioxide removal from the hydrogen-rich stream by supersonic Laval nozzle |
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| Affiliation: | 1. China University of Petroleum (East China), College of Pipeline and Civil Engineering, Qingdao, 266580, China;2. Shandong Provincial Key Laboratory of Oil and Gas Storage and Transportation Safety, Qingdao, 266580, China;3. College of Engineering Science, University of Chinese Academy of Sciences, Beijing, 100049, China;4. Institute of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang, 065007, China;1. School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, Guangdong Province, 523808, China;2. Hefei National Research Center for Physical Sciences at the Microscale, Anhui Laboratory of Advanced Photon Science and Technology, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, IChEM, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui Province, 230026, China;3. School of Materials Science and Engineering, Anhui University, Hefei 230601, Anhui, China;1. College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi''an, Shaanxi, 710021, China;2. Shaanxi Key Laboratory of Industrial Automation, Shaanxi University of Technology, Hanzhong, Shaanxi, 723001, China;1. State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China;2. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, PR China;3. Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Kemistintie 1, Espoo, P.O. Box 16100, FI-00076, Aalto, Finland;1. College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, 266580, China;2. Shandong Provincial Key Laboratory of Oil and Gas Storage and Transportation Safety, Qingdao, 266580, China;3. College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China;4. Mork Family Department of Chemical Engineering and Material Science, University of Southern California, Los Angeles, CA 90089, USA |
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| Abstract: | A hydrogen purification system with a supersonic nozzle pretreatment process is proposed to improve the performance of traditional CO2 removal processes from hydrogen-rich streams. A mathematical model of the H2–CO2 double-component condensation was established to investigate the feasibility of CO2 capture in a hydrogen-rich stream using a supersonic nozzle. Compared to the single-phase model, this model is more similar to the objective flow facts and can effectively correct the deviation of the single-phase flow model by 21.4%. Furthermore, the parameters in the H2–CO2 double-components spontaneous condensation process in the nozzle were analyzed, and the microscopic mechanism of CO2 spontaneous condensation was clarified. Finally, the effects of the inlet parameters on the carbon capture efficiency were analyzed. The results indicated that the nozzle is more suitable for purifying hydrogen-rich streams with low temperatures and high carbon content, confirming the possibility of using a supersonic nozzle as a carbon capture method. |
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| Keywords: | Hydrogen-rich stream Carbon capture Supersonic nozzle Numerical simulation Nonequilibrium condensation |
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