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Desorption Of Carbon Dioxide From Promoted Hot Potassium Carbonate In An Industrial Stripper Using Penetration Theory

M.R.Rahimpour, A.Darvishi

A mathematical model was used for simulation of CO2 desorption from promoted hot potassium carbonate solution. The combined effects of chemical reaction and mass transfer were conveniently and adequately treated within the framework of the penetration-surface renewal theory. The vapor-liquid equilibrium data for the un-promoted carbonate-CO2 was employed for developing the model which seems to be adequate at low concentration of amine for the system. The operating data for carbon dioxide desorption from DEA-hot potassium carbonate solution in an industrial stripper has been compared to model predictions. The process model was used to predict profiles of different dependent parameters in a commercial desorption unit. The effects of the promoter concentration, the promoter type and the inlet temperature of rich solution on the performance of an industrial regeneration unit have also been examined. It was found that the inlet liquid temperature impact upon both the mass transfer and the reboiler steam consumption rate.