The integration of the air separation unit and gas turbine in an IGCC power plant is crucial for optimizing performance. A study on a 400 MW IGCC system found that the rate of integration significantly impacts the plant's efficiency. The key factor influencing this rate is the amount of air flow extracted for the gas turbine. By analyzing these factors, researchers determined an optimal integration rate for the ASU, which is essential for maximizing the IGCC power plant's overall performance.