Influence of various carbon capture technologies on the performance of natural gas-fired combined cycle power plants

• Published in: Journal of mechanical science and technology Vol. 33; no. 3; pp. 1431 - 1440
• Main Authors: Ahn, Ji Ho, Jeong, Ji Hun, Choi, Byeong Seon, Kim, Tong Seop
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society of Mechanical Engineers 01.03.2019; Springer Nature B.V; 대한기계학회
• Subjects: Carbon dioxide; Carbon sequestration; Combined cycle power generation; Combustion; Control; Dynamical Systems; Electric power generation; Engineering; Industrial and Production Engineering; Mechanical Engineering; Natural gas; Power plants; Pressure ratio; Vibration; 기계공학; MEA process; Semi-closed oxy-combustion combined cycle; Gas turbine; Carbon capture; Natural gas combine cycle
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/s12206-019-0245-x

Carbon capture and storage (CCS) technology has been studied actively in recent years to address global warming. This paper aimed to make a consistent comparison of different capture technologies applied to the natural gas-fired combined cycle (NGCC). Multiple power plant systems based on a standard NGCC using three different carbon capture technologies (post-combustion, pre-combustion, and oxycombustion) were proposed, and their net performance was compared. The optimal pressure ratio of the oxy-combustion technology system was obtained. The variations in the net cycle performance of the three systems were compared using the specific CO 2 capture. The net power of the post-combustion capture scheme is lower than that of all other systems, but it has the highest efficiency. However, its biggest disadvantage is a much lower CO 2 capture rate than the oxy-combustion capture which exhibits nearly 100 % capture rate. The conclusion is that the oxy-combustion capture would provide both the highest net efficiency and power output if a high capture rate of over 92 % was required.