Travail de fin d'études et stage[BR]- Travail de fin d'études : Impact of the Exhaust Gas Recirculation on the Post Combustion Carbon Capture Applied on Class H Gas Turbine in a Combined Cycle Power Plant[BR]- Stage d'insertion professionnelle

Abstract

CO2 capture based on the chemical reaction with amine is the most developed technology in the domain of CO2 capture at the moment. Given the general growing interest in reduc- ing GHG’s worldwide, new projects using the technology are being developed. Therefore, there is definite interest in optimizing the technology. When these amine cycles are ap- plied to CCGT plants, one of the main points of improvement is the CO2 concentration of the gas at the entrance of the capture process which is low in the case of a conventional process. Selective exhaust gas recirculation (S-EGR) and exhaust gas reciruclation (EGR) are two methods that can overcome this problem. Their application on an industrial scale is studied and it is found that only EGR is currently applicable on this scale. So this study focuses on the impact that EGR has on the CO2 capture process with monoethylamine (MEA). Through a modeling of the process on Aspen Plus it is shown that the use of this technology leads to a reduction of the specific reboiler duty (SRD) of about 1.6 % and a reduction of the solvent flow rate of 2.5 %. Finally an economic analysis based on Aspen Process Economic Analyzer shows that these improvements result in a reduction of 0.6 % of life plant cost.