Effects of Halide Anions to Absorb SO2 in Ionic Liquids

Title
Effects of Halide Anions to Absorb SO2 in Ionic Liquids
Authors
이기용김창수김홍곤정민석데브정광덕
Keywords
Hydrogen; IS cycle; SO2 absorption; Ionic Liquids; SO2 solubility; Anionic effect
Issue Date
2010-07
Publisher
Bulletin of the Korean Chemical Society
Citation
VOL 31, NO 7, 1937-1940
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/38889
ISSN
0253-2964
Appears in Collections:
KIST Publication > Article
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