System and method for cooling gas turbine components

A system for cooling components of a turbine (16, 64) includes: at least one input in fluid communication with a source of carbon dioxide gas, the carbon dioxide gas removed from synthesis gas produced by a gasification unit (32) from hydrocarbon fuel; and at least one first conduit (62, 69) in fluid communication with the at least one input and configured to divert a portion of the carbon dioxide gas from the source of carbon dioxide gas to at least one component of the turbine (16), the turbine (16) configured to combust the synthesis gas.