SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2021, Vol. 36 ›› Issue (8): 47-56.DOI: 10.1016/j.cjche.2020.08.012

• Separation Science and Engineering • Previous Articles     Next Articles

Numerical simulation of low-concentration CO2 adsorption on fixed bed using finite element analysis

Yonghou Xiao1,2, Shuang Qiu2, Qidong Zhao2, Yuhao Zhu2, Chirag B. Godiya1, Gaohong He1,2,3   

  1. 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
  • Received:2020-06-03 Revised:2020-08-06 Online:2021-09-30 Published:2021-08-28
  • Contact: Yonghou Xiao, Gaohong He
  • Supported by:
    This research was supported by the National Natural Science Foundation of China (21776028), Key Research and Development Projects of Liaoning Province (2017308004).

Numerical simulation of low-concentration CO2 adsorption on fixed bed using finite element analysis

Yonghou Xiao1,2, Shuang Qiu2, Qidong Zhao2, Yuhao Zhu2, Chirag B. Godiya1, Gaohong He1,2,3   

  1. 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
  • 通讯作者: Yonghou Xiao, Gaohong He
  • 基金资助:
    This research was supported by the National Natural Science Foundation of China (21776028), Key Research and Development Projects of Liaoning Province (2017308004).

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 adsorption 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 concentration, 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.

Key words: Carbon dioxide, Adsorption, Fixed bed, Finite element analysis, Distributions of concentration and temperature field

摘要: 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 adsorption 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 concentration, 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.

关键词: Carbon dioxide, Adsorption, Fixed bed, Finite element analysis, Distributions of concentration and temperature field