[62] selected a 600 MW coal-fired power plant as the reference unit and also simulated the CO2 capture process by aqueous ammonia using an equilibrium based model in Aspen Plus process simulator. Key operating parameters in the absorption and regeneration processes were optimized and the minimum regeneration energy could reach 2.09 MJ/kgCO2, which is much lower than that reported for the Munmorah pilot plant and typical MEA process. Niu et al