| 초록 |
CrO3 particles were synthesized via a thermal reaction at 85 °C using the ionic liquid. Poly(ethylene oxide) (PEO) composite membrane was prepared for CO2/N2 separation with CrO3 particles and BMIM-BF4. It was expected that the CrO3 particles could enhance the solubility of CO2 gas molecules. Furthermore, free imidazolium ions of BMIM-BF4 played a role as agents for enhancing CO2 transport. The permeance and selectivity of a PEO membrane without CrO3 particles were 11.0 gas permeance units (GPU) and 6.5, respectively, while the CO2 permeance of the composite membrane containing CrO3 was 144 GPU with selectivity of 30. These results were attributable to the fabricated CrO3 particles to improve the solubility of CO2, leading to high efficiency in CO2/N2 separation. Thus, the permeance and selectivity increased due to the synergistic effect of the increased CO2 solubility by chromate esters generated from CrO3 and the barrier effect on N2 molecules by particles. |
