The integration of a cryogenic air separation unit with gas turbine combined-cycle modules can boost power output, efficiency, and lower costs in gasification facilities. Different levels of integration can be optimal depending on specific factors. Advancements in air separation and gas turbine technologies offer new opportunities for improved performance and cost reduction. Integration of compression heat and refrigeration sources from the air separation unit can further enhance efficiency. Operability issues related to integration have been addressed, ensuring safe and reliable operation of these facilities.