| 초록 |
Hollow fiber membrane contactor-stripper hybrid process was used to recover CO2 from the flue gas, and the physical and chemical stability test of hollow fibers against alkanolamine-based absorbents was conducted. The CO2 removal efficiency of polyvinylidenefluoride(PVDF) and polypropylene(PP) hollow fiber membrane contactor was tested with aqueous monoethanolamine(MEA), triethanolamine(TEA) and methyl-diethanolamine(MDEA) absorbent. For MEA, the hollow fibers showed a high CO2 removal efficiency, but poor chemical and physical stability because the MEA absorbent chemically attacked fibers or physically well penetrated into fiber's pores. For TEA, the hollow fibers showed a low CO2 removal efficiency, but good chemical and physical stability. In the case of mixed absorbent adding MEA to aqueous TEA solution, CO2 removal efficiency of the hollow fiber membrane contactor was enlarged, and this mixed absorbent made it possible to operate this system under long term steady-state conditions due to creating stable liquid-gas interface among the fiber's pores. |
