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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 31, Number 7
BKCSDE 31(7)
July 20, 2010

Title	Effects of Halide Anions to Absorb SO₂ in Ionic Liquids
Author	Ki Young Lee, Chang Soo Kim, Honggon Kim, Minserk Cheong, Deb Kumar Mukherjee, Kwang Deog Jung
Keywords	Ionic liquids, SO₂ absorption, SO₂ solubility, Anionic effect
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 ^oC and desorption at 140 ^oC. The reversibility of SO₂ absorption was confirmed by FT-IR studies.
Page	1937 - 1940
Full Text	PDF

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