Numerical simulation of low-concentration CO2 adsorption on fixed bed using finite element analysis |
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Authors: | Yonghou Xiao Shuang Qiu Qidong Zhao Yuhao Zhu Chirag BGodiya Gaohong He |
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Affiliation: | 1.Panjin Institute of Industrial Technology, Dalian University of Technology, Panjin 124221, China;2.State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China;3.Supercomputing Center, Dalian University of Technology, Dalian 116000, China |
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Abstract: | Accurately predicting distributions of concentration and temperature field in fixed-bed column is essential for designing adsorption processes.In this study,a two-dimensional (2D),axisymmetric,nonisothermal,dynamic adsorption model was established by coupling equations of mass,momentum and energy balance,and solved by finite element analysis.The simulation breakthrough curves fit well with the low-concentration CO2 adsorp-tion experimental data,indicating the reliability of the established model.The distributions of concentration and temperature field in the column for CO2 adsorption and separation from CO2/N2 were obtained.The sensitivity analysis of the adsorption conditions shows that the operation parameters such as feed flow rate,feed concentra-tion,pellet size,and column height-to-diameter ratio produce a significant effect on the dynamic adsorption performance.The multi-physics coupled 2D axisymmetric model could provide a theoretical foundation and guidance for designing CO2 fixed-bed adsorption and separation processes,which could be extended to other mixed gases as well. |
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Keywords: | Carbon dioxide Adsorption Fixed bed Finite element analysis Distributions of concentration and temperature field |
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