Ionic liquids (ILs) mixtures with water, amines, and other solvents have been receiving attention as alternative CO₂ absorbents that could offer energy savings compared with traditional aqueous MEA processes and mitigate the high cost or viscosity of pure ionic liquids. In this work, mixtures of two ionic liquids (1-butyl-3-methylimidazolium acetate [bmim][OAc], 1-ethyl-3-methylimidazolium octylsulphate [emim][OcSO₄]) and five amines (1,1,3,3-tetramethylguanidine (TMG), 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), 1,4-diazabicyclo[2.2.2]octane (DABCO), triethylamine (TEA), and 2,2′-aminodiethanol (DEA)) were used for CO₂ capture. In total, ten model systems were investigated. Generalized patterns of composition-CO₂ absorption relationships were identified depending on the underlying mechanism of absorption. Viscosity, degradation and regeneration potential of the selected systems were determined. DBU-[emim][OcSO₄] systems showed the temperature of regeneration as low as 60 °C. The viscosity of all systems was greatly reduced by the addition of water. Some CO₂-rich solutions displayed non‐Newtonian behavior. Mechanism of CO₂ absorption in imidazolium ionic liquids in the presence of DBU was confirmed based on ¹³C NMR.

离子液体（IL）与水，胺和其他溶剂的混合物已作为替代性的CO ₂吸收剂受到关注，与传统的水性MEA工艺相比，它可以节省能源并减轻纯离子液体的高成本或粘度。在这项工作中，是两种离子液体（乙酸1-丁基-3-甲基咪唑鎓乙酸盐[bmim] [OAc]，1-乙基-3-甲基咪唑鎓辛基硫酸盐[emim] [OcSO ₄ ]）和五种胺类（1,1,3的混合物） 1,3-四甲基胍（TMG），1,8-二氮杂双环[5.4.0]十一碳-7-烯（DBU），1,4-二氮杂双环[2.2.2]辛烷（DABCO），三乙胺（TEA）和2 2'-氨基二乙醇（DEA））用于捕获CO ₂。总共研究了十个模型系统。组成物-CO _2的广义模式根据潜在的吸收机制确定吸收关系。确定了所选系统的粘度，降解和再生潜力。DBU- [emim] [OcSO ₄ ]系统的再生温度低至60°C。加水可大大降低所有体系的粘度。一些富含CO _2的解决方案显示出非牛顿行为。基于¹³ C NMR ，确认了在DBU存在下咪唑鎓离子液体中CO _2的吸收机理。