Clean Energy Center, Korea Institute of Science and Technology, 39-1Hawolgok-dong, Sungbuk-gu, Seoul 136-791, Republic of Korea; Department of Chemistry and Research Institute of Basic Sciences, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea.
Department of Chemistry and Research Institute of Basic Sciences, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea.
J Hazard Mater. 2015 May 30;289:63-71. doi: 10.1016/j.jhazmat.2015.02.022. Epub 2015 Feb 7.
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, pKb=8.2), 1-butyl-1,4-dimethylpiperazinium chloride ([BDMP]Cl, pKb=9.8), and 1-butyl-4-aza-1-azoniabicyclo[2,2,2]octane chloride ([BDABCO]Cl, pKb=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.
SO2 在含有叔胺阳离子和氯离子的二胺衍生熔融盐水溶液中的吸收和解吸行为进行了研究，包括丁基-(2-二甲氨基乙基)-二甲基氯化铵([BTMEDA]Cl，pKb=8.2)、1-丁基-1,4-二甲基哌嗪氯化铵([BDMP]Cl，pKb=9.8)和 1-丁基-4-氮杂-1-氮杂双环[2.2.2]辛烷氯化铵([BDABCO]Cl，pKb=11.1)。熔融盐的 SO2 吸收和解吸性能受熔融盐碱性的影响很大。SO2 与熔融盐相互作用的光谱、X 射线晶体学和计算结果表明，根据未季铵化氨基的碱性，可以生成两种含有 SO2 的物质：一种是由两个不同的阴离子 HSO3(-)和 Cl(-)组成的二价阳离子物种，另一种是带有 Cl(-)并与中性 H2SO3 相互作用的单价阳离子物种。
