Latest Performances and Improvement Perspective of Oxycombustion for Carbon Capture on Coal Power Plants

Abstract In recent years Oxycombustion has emerged as a competitive option for CO 2 capture on coal power plants. Air Liquide has been a key contributor to this evolution by developing technologies essential to the technical feasibility, flexibility and economic competitiveness of Oxycombustion. This concerns in particular the ASU (Air Separation Unit) and the CPU (Cryogenic Purification Unit) which represent the largest CO 2 capture costs. This paper first presents the main advantages of Oxycombustion, in comparison to Post-combustion. It then describes the most recent technical achievements and roadmap for further improvements to decrease the cost and energy penalty associated with CO 2 capture.