Modelling of high pressure CO2 absorption using PZ+AMP blended solution in a packed absorption column

Abstract A rate-based steady-state model for CO 2 absorption into a PZ+AMP blended solution is presented by taking into account the column hydraulics, mass transfer resistances and chemical reactions. The simulation results were compared with the experimental results of CO 2 absorption by a PZ+AMP blended solution in a packed absorption column at low and high CO 2 partial pressure conditions. The model predicts CO 2 concentration, amine concentration, the chemical enhancement factor, and liquid temperature profiles along the column. The model was in good agreement to predict the CO 2 concentration profiles along the column at low CO 2 partial pressure. However, it was found that the model needs to be corrected by introducing a correction factor for overall volumetric mass transfer coefficient ( K g a e ) for the simulation of CO 2 concentration profiles along the column at high CO 2 partial pressure conditions in the range of 404–1616 kPa.