A method of generating energy in a power
plant (30) having a gas
turbine (29), includes a first step a gas containing air (1) is compressed in a first compressor (2) of the gas
turbine (29), a second step the compressed gas (3, 3a, 3b; 5; 7a, 7b) is fed to a
combustion process with the addition of fuel (8) in a
combustor (23), a third step the hot
flue gas (9) from the
combustor (23) is expanded in an expander or a
turbine (10), driving a generator (18), of the gas turbine (29) while performing work, and a fourth step a partial flow of the expanded
flue gas (11) is recirculated to the inlet of the first compressor (2) and admixed with the gas containing air (1).
Carbon dioxide (CO2) is separated from the compressed gas (3, 3a, 3b; 5; 7a, 7b) in a CO2 separator (6) before the third step. In such a method, the overall size and energy costs are reduced by virtue of the fact that, to permit increased CO2 concentrations in the CO2 separator (6), not more than about 70% of the
carbon dioxide contained in the compressed gas (3, 3a, 3b; 5, 5a, 5b; 7a, 7b) is removed from the compressed gas (3, 3a, 3b; 5, 5a, 5b; 7a, 7b).