Computational fluid dynamics simulation of reactive absorption of CO2 in a structured packed column

Abstract

AbstractIn this study, multiphase Eulerian computational fluid dynamics (CFD) modelling is developed to predict the hydrodynamics, mass transfer, and chemical absorption of CO2 using a monoethanolamine (MEA) solution in a structured packed column. First, the hydrodynamic simulation of liquid dispersion in a structured packed bed using a two‐dimensional CFD is performed. The simulation results of the radial distribution of the liquid holdup are compared with the literature experimental data. The model prediction matches the experimental data at the top position of the column, whereas a slight deviation is found at the bottom position of the column. Using a validated CFD model, the reactive mass transfer is modelled to study CO2 capture in a structured packed column with Mellapak 500.X. The model results are compared to the literature experimental results of CO2 mole fractions along the height of the column. It is found that the model results match the experimental findings. Furthermore, CFD modelling is extended to investigate the influence of operating conditions such as gas and liquid velocities on CO2 removal efficiency. The present CFD model demonstrates the porous media approach for reactive absorption of CO2 in a structural packed bed.