A preliminary investigation of cryogenic CO 2 capture utilizing a reverse brayton cycle

Abstract

Utilizing CO 2 capture and storage (CCS) technologies is a significant way to reduce carbon emissions from coal fired power plants. Cryogenic CO 2 capture (CCC) is an innovative and promising CO 2 capture technology, which has an apparent energy and environmental advantage compared to alternatives. A process of capturing CO 2 from the flue gas of a coal-fired electrical power plant by cryogenically desublimating CO 2 has been discussed and demonstrated theoretically. However, pressurizing the inlet flue gas to reduce the energy penalty for the cryogenic process will lead to a more complex system. In this paper, a modified CCC system utilizing a reverse Brayton Cycle is proposed, and the energy penalty of these two systems are compared theoretically.