Numerical simulation of low-concentration CO_(2) adsorption on fixed bed using finite element analysis  

作　　者：Yonghou Xiao Shuang Qiu Qidong Zhao Yuhao Zhu Chirag BGodiya Gaohong He 

机构地区：[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

出　　处：《Chinese Journal of Chemical Engineering》2021年第8期47-56,共10页中国化学工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(21776028);Key Research and Development Projects of Liaoning Province(2017308004)。

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 CO_(2) adsorption experimental data,indicating the reliability of the established model.The distributions of concentration and temperature field in the column for CO_(2) adsorption and separation from CO_(2)/N_(2) 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 CO_(2) 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 

分 类 号：X701[环境科学与工程—环境工程] TQ424[化学工程]