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Solubility of CO_2 in aqueous mixtures of monoethanolamine and dicyanamide-based ionic liquids

机译:CO_2在单乙醇胺和双氰胺基离子液体的水性混合物中的溶解度

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摘要

Two low viscous ionic liquids (ILs), 1-(2-hydroxyethyl)-3-methyl-imidazolium dicyanamide ([C_2OHmim][DCA]) and 1-butyl-3-methylimidazolium ([Bmim][DCA]) were selected to mixed with aqueous 30 wt% monoethanolamine (MEA) for CO_2 absorption. The solubility of CO_2 in the aqueous mixtures of MEA + ILs was measured over a range of CO_2 partial pressure of 10-800 kPa and ILs concentrations from 10 to 50 wt% at 313.15 K and 333.15 K. Correlations of solubility as a function of CO_2 partial pressure have been conducted with deviation of ±1.5%. Moreover, the density and viscosity of pure ILs and MEA + ILs + H_2O systems with different IL mass fractions were measured at temperature varying from 293.15 to 333.15 K.
机译:选择了两种低粘度离子液体(IL):1-(2-羟乙基)-3-甲基咪唑鎓双氰胺([C_2OHmim] [DCA])和1-丁基-3-甲基咪唑鎓([Bmim] [DCA]),与30 wt%单乙醇胺(MEA)水溶液混合以吸收CO_2。在313.15 K和333.15 K的CO_2分压为10-800 kPa和ILs浓度为10至50 wt%的范围内,测量MEA + ILs的水性混合物中CO_2的溶解度。溶解度与CO_2的关系分压的偏差为±1.5%。此外,在293.15至333.15 K的温度范围内,测量了具有不同IL质量分数的纯IL和MEA + ILs + H_2O系统的密度和粘度。

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