Abstract
Abstract A detailed analysis covering a thermodynamic and economic evaluation of a 440 MWe natural gas combined cycle power plant with an integrated CO 2 removal plant, using an aqueous solution of monoethanolamine (MEA) has been used as basis for this study. The flow sheet representing the CO 2 capture plant is optimized using absorber intercooling and lean vapour recompression (LVR). In addition, to further reduce the costs of CO 2 capture the gas turbine is utilizing exhaust gas recirculation (EGR) with a level of 40% and thereby the CO 2 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 CO 2 compression is performed. It is shown that increased thermodynamic performance is achieved on the expenses of increased costs.
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