Design of a cryogenic CO2 capture system based on Stirling coolers

In this research, a novel cryogenic CO2 capture system based on Stirling coolers has been developed. By the capture system designed, an effective separation can be achieved according to differences in condensation and desublimation. From the capture process, H2O and CO2 can condense and desublimate at different parts of the capture system, while residual gas flows out without properties change. It is noteworthy that in the process, CO2 can be captured in a solid form, thus avoiding the use of the solvents and consideration of pressure in other methods. Furthermore, two significant parameters (the temperature of Stirling coolers and the flow rate of the gas stream) were investigated in detail. The results showed that under the optimal temperature and flow rate, CO2 recovery of the cryogenic process can reach 96%, which demonstrated that the system can capture CO2 gas effectively. (C) 2012 Elsevier Ltd. All rights reserved.