Abstract: An integrated coal gasification plant and combined cycle system employs a supply of compressed air bled off at an intermediate pressure from an air compressor portion of a gas turbine to supply the compressed-air needs of an oxygen plant associated with the coal gasification plant. The high-temperature exhaust from the turbine section of the gas turbine is employed to generate steam in a heat recovery steam generator. The steam drives a steam turbine to produce additional mechanical output. In order to compensate for the removal of the compressed air fed to the oxygen plant, the spent steam from the steam turbine is added to the compressed air and fuel in the combustor portion of the gas turbine. The unexpended energy in the steam fed to the combustor is recovered by expansion in the turbine of the gas turbine and by absorption in the heat receovery stem generator.