Membrane pilot plant trials of CO2 separation from flue gas

摘要

Industrial trials of membrane separation of CO2 from flue gas generated by a lignite-fired power station are reported. A hollow fiber Air Products PRISM and a spiral wound Dow Filmtec (R) NF3838/30FF membrane were separately trialed. The CO2 permeance and selectivity through the PRISM membrane fell significantly in the initial hours of operation, reflecting competitive sorption effects and concentration polarisation. Alternatively, the wet flue gas enabled a facilitated transport mechanism to operate for the NF3838/30FF membrane and the CO2 permeance and selectivity increased significantly compared to the dry membrane. Standard correlations were able to simulate the pressure drops through the modules.(c) 2015 Society of Chemical Industry and John Wiley & Sons, Ltd