The present paper follows two prior works by Liu et al. (2015) and Liu et al. (2017), conducted on the subject of CO2 capture with a monoethanolamine based process. The study presented in this article is about the improvements brought to the flow sheet of supercritical coal-fired power plant aiming to reduce as much as possible the efficiency penalty created by the CO2 capture process. MEA based capture processes require a lot of energy, extracted from the steam cycle, in order to regenerate the solvent, hence the loss of efficiency. Reducing the efficiency penalty is operated through several methods. The first one is reducing the energy consumed by the reboiler in the MEA capture process itself by splitting the rich solvent and using a kettle type heat exchanger for the heat exchanges between the rich and lean MEA solvent. The second method consists of getting heat from the lean solvent back into the steam cycle by pre-heating the water after the low-pressure turbine to 327K. The pre-heating can be improved with a water-ammonia Absorption Heat Transformer. The pre-heating is first being conducted with heat coming from the vapor and liquid phases generated by the AHT, and in a second simulation, only the liquid phase is being used for the pre-heating, and the vapor is sent through a turbine to generate an additional 6.17 MW of power. The last simulation is a combination of the kettle type heat exchanger and the AHT process with the additional turbine. The impact of a reduced capture rate is also being studied in this paper, as the original 90% capture is being decreased to 50% in order to reach the same emission levels as gas-fired power plants (Gonzalez-Salazar et al., 2018). The reduction of the capture rate decreases the efficiency penalty linearly and goes from 8.62% at 90% of the capture rate (Liu et al., 2017) to 5.53% at a 50% capture rate. After modifying the models, by replacing “Heater” type blocks by real heat exchanger and optimizing the steam flow rates with User-Defined Functions in Aspen+, to make the models more precise, the reference efficiency penalty of 8.62% is decreased to 8.46%, which is then reduced to 8.03% for the capture process modification, 7.83% for the pre-heating of the water with the AHT process, 7.45% for the AHT equipped with a turbine and 6.70% when combining the kettle heat exchanger and the AHT process equipped with a turbine.