A
power generation system includes a first
turbine system. The first
turbine system includes a first compressor section comprising at least two stages. The two stages includes a first low pressure compressor fluidly coupled to a first
high pressure compressor configured to supply a first portion of compressed oxidant and a second portion of compressed oxidant A first
combustion chamber is configured to combust said first portion of compressed oxidant and a first fuel
stream comprising carbon-based fuels and to generate a first hot
flue gas. The first
turbine system further includes a first expander section having an inlet for receiving said first hot
flue gas and generating a first expanded
exhaust gas rich in CO2. The first high-pressure expander is fluidly coupled to a first low-pressure expander configured to generate a first exhaust and electrical energy. A CO2
separation system is fluidly coupled to the high-pressure expander for receiving said first expanded
exhaust gas from said first high-pressure expander and provide a CO2 lean gas that is then fed to said first low-pressure expander. The
power generation system also includes a second turbine system including a second compressor section comprising at least two stages. The two stages includes a second low-pressure compressor fluidly coupled to a second
high pressure compressor, wherein said
high pressure compressor is configured to receive said second portion of compressed oxidant. A second
combustion chamber is configured to combust a second fuel
stream comprising carbon-based fuels and to generate a second hot
flue gas and a second expander section is configured to receive said second hot
flue gas and to generate a second final exhaust and electrical energy. The second compressor section is configured to receive said second final exhaust comprising
carbon dioxide and to
discharge a recycle
stream from said second high pressure compressor to said second
combustion chamber and a split stream from said second low-pressure compressor to said first high pressure compressor.