A power generation system including a gas turbine with heat recovery steam generator and carbon dioxide capture, and method

A gas turbine system comprising:

• a gas turbine engine;
• a first fuel line adapted to feed fuel to the gas turbine engine;
• a heat recovery steam generator adapted to receive flue gas exhausted from the gas turbine engine;
• a second fuel line adapted to feed fuel to a post-burner of the heat recovery steam generator;
• a carbon dioxide capture unit fluidly coupled to a stack of the heat recovery steam generator and adapted to capture carbon dioxide from the flue gas exhausted from the heat recovery steam generator;
• a recycling line, adapted to recycle flue gas from the stack of the heat recovery steam generator to the post-burner in the heat recovery steam generator;
• and,
• at least one carbon dioxide return line adapted to recycle a gaseous stream containing carbon dioxide which has been at least partly processed by the carbon dioxide capture unit towards at least one of said gas turbine engine and said post-burner.