Turbine powered electricity generation

A process comprising:

• a. feeding a separator feedstream comprising syngas from natural gas to separator means,
• b. separating the separator feedstream in the separator means to form a first, CO-rich stream and a second, H2-rich stream,
• c. feeding the first, CO-rich stream as an oxyfuel combustor feedstream to oxyfuel combustor means for forming sub-critical CO2 gas turbine working fluid,
• d. feeding the sub-critical CO2 gas turbine working fluid to sub-critical CO2 gas turbine means, the sub-critical CO2 gas turbine means having a sub-critical CO2 gas turbine expansion section and a sub-critical CO2 gas turbine compression section, the sub-critical CO2 gas turbine working fluid being fed to the sub-critical CO2 gas turbine expansion section for producing power,
• e. recycling at least a first portion of exhaust from the sub-critical CO2 gas turbine expansion section to the sub-critical CO2 gas turbine compression section of the sub-critical CO2 gas turbine means, wherein the power produced in step (d) is used to power the sub-critical CO2 gas turbine compression section to compress the recycled at least first portion of exhaust from the sub-critical CO2 gas turbine expansion section,
• f. capturing the remaining portion of the exhaust from the sub-critical CO2 gas turbine expansion section,
• g. feeding the compressed recycled at least first portion of exhaust from sub-critical CO2 gas turbine expansion section to the oxyfuel combustor means,
• h. reacting the first, CO-rich stream with high purity oxygen in the oxyfuel combustor means under sub-critical CO2 conditions,
• i. feeding the second, H2-rich stream as an air-fuel combustor feedstream to air-fuel combustor means wherein the air-fuel combustor feedstream is reacted with air to form an air-fuel gas turbine working fluid,
• j. feeding the air-fuel gas turbine working fluid to air-fuel gas turbine means, the air-fuel gas turbine means having an air-fuel gas turbine expansion section and an air-fuel gas turbine compression section, the air-fuel gas turbine working fluid being fed to the air-fuel gas turbine expansion section for producing power,
• k. feeding air to the air-fuel gas turbine compression section of the air-fuel gas turbine means, wherein the air is compressed using the power produced in step (j),
• l. feeding the compressed air to the air-fuel combustor means for reaction with the second, H2-rich stream to form the air-fuel gas turbine working fluid,
• m. wherein before recycling the at least first portion of exhaust from the sub-critical CO2 gas turbine expansion section to the sub-critical CO2 gas turbine compression section of the sub-critical CO2 gas turbine means, the exhaust from the sub-critical CO2 gas turbine expansion section is fed to first heat recovery steam generator means for generating steam,
• n. wherein steam from the first heat recovery steam generator means is fed to first steam turbine means for generating power,
• o. wherein exhaust from the air-fuel gas turbine means is fed to second heat recovery steam generator means for generating steam,
• p. wherein steam from the second heat recovery steam generator means is fed to second steam turbine means for generating power, and
• q. wherein the first, CO-rich stream is fed directly from the separator means to the oxyfuel combustor means.