Part load operation of natural gas fired power plant with CO2 capture system for selective exhaust gas recirculation

• Model of gas power plant with CO 2 capture for selective recycle is presented. Gas offers stable combustion, higher content, low flow and reboiler duty. Part-load operation at 80, 60, 40% analyzed the parallel hybrid case. This work investigates base part load natural combined cycle integrated post-combustion exhaust recirculation scheme. Decarbonizing complex due to flue rate least content ~ 3–4 vol% residual 20% O 77% N content. Therefore, effect series, examined, a concept where selectively can be recycled back mixed into ambient air inlet feed compressor thereby reducing enhancing plant. The study novel in way that part-load performance 60 scheme through process simulation Aspen Plus 606 MW commercial-scale coupled an amine-based It found results model agrees well experimental results. Further, show viability by concentration configuration approximately 19 vol%. For configuration, increases around 13–14 70% ratio comparison 6.6 simple EGR 35% ratio. more combustion maintaining combustor inlets cases reduces 68 70%, respectively thus size specific duty hybrid, parallel, series 3.19, 3.25, 3.31 MJ/kg , 3.54 case MEA-based unit. Whereas 80 change, drops from 1.78% 1.14% configurations, respectively. In conclusion, shows less efficiency penalty decrease configuration. innovative aspect performed, similar pattern as baseload operation.