A preliminary investigation of cryogenic CO2 capture utilizing a reverse Brayton Cycle

Abstract

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.

A comparative study of modified Linde and cryogenic cooling for CO 2 separation

“…Compressor work is done and the cooling load required to liquefy 1 kg of CO 2 is given by Equations ( 17) and (18).…”

“…This study concludes that the solidification of CO 2 reduces the CO 2 condensation. 17 Yuan et al 18 have conducted a preliminary study of CO 2 separation from flue gas using the reverse Brayton cycle. The inlet flue gas is pressurized to a higher pressure to reduce the energy penalty of the CO 2 capture system.…”

“…But, the mechanical work produced by the turbines is not utilized. 18 Xu et al 14 have conducted a study on an improved separation of CO 2 by the cryogenic method at high pressures. The study further compares the use of MEA and Selexola absorption systems.…”

Sensitivity Analysis of Carbonate Looping Process Using Twin Fluidized Bed Model

“…There have been many methods in the literature about post-combustion CO2 captures, such as absorption (Porter et al, 2015), adsorption (Shah and Imae, 2016), cryogenic (Yuan et al, 2014), chemical looping (Leion et al, 2008) and membrane (Zhao et al, 2018;Yang et al, 2019). However, these processes have some bottlenecks including enormous energy losses of 8-14% which increase fuel consumption and environmental concern regarding solvent regeneration (Lasheras et al, 2011;Oh et al, 2016;Liu et al, 2019a, b).…”