Optimized carbon dioxide removal model for gas fired power plant

Abstract

The carbon capture process model was developed for 500MW gas-fired power plant flue gas treating. Three different efficiencies, 85%, 90%, and 95%, were used to implement the model in Aspen Plus. The electrolyte NRTL rate base model was used to develop the model. The selected solvent properties were used to develop and implemented model is used for further simulations. The implemented open loop base case model of 85% removal efficiency is used to check the parameters' effect on removal efficiency and re-boiler duty. Absorber packing height and diameter, absorber pressure, solvent and flue gas temperatures are positively affected on CO2 removal efficiency. The packing height of absorber and stripper, solvent temperature and absorber pressure are negatively effects on re-boiler duty. The energy requirement in the re-generation process (re-boiler duty) are 3781, 4050, and 4240 kJ/kg CO2 for 85%, 90%, and 95% capture models respectively. Parameter optimization is important to implement the carbon capture process in real industries to get higher removal efficiency and lowest re-boiler duty.