Lim, Seung Rok Hwang, Junhyeok Kim, Chang Soo Park, Ho Seok Cheong, Minserk Kim, Hoon Sik Lee, Hyunjoo 2024-01-20T07:02:24Z 2024-01-20T07:02:24Z 2021-09-04 2015-05 0304-3894 https://pubs.kist.re.kr/handle/201004/125422 SO2 absorption and desorption behaviors were investigated in aqueous solutions of diamine-derived molten salts with a tertiary amine group on the cation and a chloride anion, including butyl-(2-dimethylaminoethyl)-dimethylammonium chloride ([BTMEDA]Cl, pK(b) = 8.2), 1-butyl-1,4-dimethylpiperazinium chloride ([BDMP]Cl, pK(b) = 9.8), and 1-butyl-4-aza-1-azoniabicyclo[2,2,2]octane chloride ([BDABCO]Cl, pK(b) = 11.1). The SO2 absorption and desorption performance of the molten salt were greatly affected by the basicity of the molten salt. Spectroscopic, X-ray crystallographic, and computational results for the interactions of SO2 with molten salts suggest that two types of SO2-containg species could be generated depending on the basicity of the unquaternized amino group: a dicationic species comprising two different anions, HSO3- and Cl-, and a monocationic species bearing Cl- interacting with neutral H2SO3. (C) 2015 Elsevier B.V. All rights reserved. English Elsevier BV Absorption and desorption of SO2 in aqueous solutions of diamine-based molten salts Article 10.1016/j.jhazmat.2015.02.022 1 Journal of Hazardous Materials, v.289, pp.63 - 71 Journal of Hazardous Materials 289 63 71 N scie scopus 000353079300008 2-s2.0-84922982645 Engineering, Environmental Environmental Sciences Engineering Environmental Sciences & Ecology Article IONIC LIQUIDS HIGHLY EFFICIENT CAPTURE GAS REMOVAL WATER SO2 Absorbent Amine Molten salt Reversibility