【摘要】 合成了氯化胆碱-乙二醇离子液体,研究了该离子液体与乙醇胺混合吸收液（摩尔比6∶1）吸收CO₂性能及解吸行为。该离子液体加入乙醇胺后对CO₂吸收极为迅速且具有较大吸收容量,并通过循环伏安方法监测吸收产物质子化乙醇胺（MEAH⁺）的电化学行为。真空条件(80℃,10^-5 atm)下解吸后的MEAH⁺的循环伏安行为表明,该条件下可实现离子液体的回收利用。通过测定液相中MEAH⁺浓度变化来研究吸收的方法,不仅有利于研究吸收过程中的反应机理,而且具有测定速度快,测控便捷等特点。更多还原

【Abstract】 The choline chloride based ionic liquids have the advantages such as extremely low volatility,electrochemical stability, easy preparation at low cost, and are more suitable for large-scale applications. In this paper, choline chloride-ethylene glycol（ChCl-EG） ionic liquids were synthesized and mixed with MEA（6∶1 in molar ratio） to study adsorption properties and desorption behaviors of CO₂. Addition of MEA into ChCl-EG significantly increased the CO₂ absorption capacity and acquired the electrochemical response of MEAH⁺. The ChCl-EG-MEA electrolyte was saturated with CO₂, and then cyclic voltammetric signals were recorded after vacuum heating(80 ℃, 10^-5 atm). The results showed that the solution could be recycled in this condition. By measuring the concentration change of MEAH⁺ in liquid phase, the method could be used to study the reaction mechanism in the absorption process with the advantages of fast determination and convenient control.更多还原