Sammendrag
A detailed analysis covering a thermodynamic and economic evaluation of a 440 MWe natural gas combined cycle power plant with an integrated CO2 removal plant, using an aqueous solution of monoethanolamine (MEA) has been used as basis for this study. The flow sheet representing the CO2 capture plant is optimized using absorber intercooling and lean vapour recompression (LVR). In addition, to further reduce the costs of CO2 capture the gas turbine is utilizing exhaust gas recirculation (EGR) with a level of 40% and thereby the CO2 content in the gas turbine exhaust gas is increased to almost the double compared to conventional operating gas turbines. A techno-economic evaluation of the simulated results of the extended MEA absorption/desorption process integrated into the NGCC with EGR and CO2 compression is performed. It is shown that increased thermodynamic performance is achieved on the expenses of increased costs.