Effects of Halide Anions to Absorb SO2 in Ionic Liquids
- Effects of Halide Anions to Absorb SO2 in Ionic Liquids
- 이기용; 김창수; 김홍곤; 정민석; 데브; 정광덕
- Hydrogen; IS cycle; SO2 absorption; Ionic Liquids; SO2 solubility; Anionic effect
- Issue Date
- Bulletin of the Korean Chemical Society
- VOL 31, NO 7, 1937-1940
- Ionic liquids with halide anions were prepared and the dependency of halide anions on the SO2 solubility of ILs was
investigated. The study shows that the SO2 solubility of ionic liquids lies in the range 1.91 ~ 2.22 SO2/ILs mol ratio.
SO2 solubility in ionic liquids with varying halide anions follows the order Br > Cl > I. Theoretical investigation was
also conducted at the B3LYP level using the Gaussian 03 program. From the theoretical consideration of the interaction
between SO2 and [EMIm]X (where X = Cl, Br, and I), it has been proposed that primary interaction of halide occurs
with C2-H of the imidazolium and S of SO2. Experimental results further shows that the absorption and desorption process
of SO2 in ILs was reversible by the three cycles of the absorption at 50 ℃ and desorption at 140 ℃. The reversibility
of SO2 absorption was confirmed by FT-IR studies.
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