CFD simulation for reduction of pyrolusite in fluidized beds |
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| Institution: | 1. State Key Laboratory of Multi-phase Complex Systems, Institute of Processing Engineering, Chinese Academy of Sciences, Beijing, 100190, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;3. State Key Laboratory of Biochemical Engineering, Institute of Processing Engineering, Chinese Academy of Sciences, Beijing, 100190, China;1. School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China;2. Shanxi Engineering Technology Research Center for Ultrafine Powder, North University of China, Taiyuan, 030051, China;3. School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China;4. Institute of Occupational Health of Ordnance Industry, Xi''an, 710065, China;1. College of Information and Electrical Engineering, China Agricultural University, Beijing, 100083, China;2. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, 100190, China;1. Computational Science Center, National Renewable Energy Laboratory, United States;2. Research Computing, University of Colorado, Boulder, United States;3. Chemical and Biological Engineering, University of Colorado, Boulder, United States;4. Computational Science and Engineering, National Energy Technology Laboratory, United States;1. School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212000, China;2. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212000, China |
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| Abstract: | In this study, a CFD model coupled with heterogeneous flow structure, mass transfer equations, and chemical reaction kinetics is established to forecast the pyrolusite reduction reaction behavior. Compared with the previous studies which ignore the volume change of solids phase, the influence of volume shrinkage on reaction and flow behavior is explored in this research. Volume shrinkage of pyrolusite is proved to be non-negligible in predicting the conversion rate. The negligence of volume shrinkage leads to the overestimation of conversion rate for its inaccurate estimation of surface area for reaction. Besides, the influence of volume shrinkage on the reaction is found smaller in the scaled-up reactor. |
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| Keywords: | Heterogeneous flow structure Chemical reaction kinetics CFD Bubbling fluidized bed Pyrolusite reduction reaction |
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