Due to its great potential of energy consumption saving, the biphasic solvent has attracted more and more attention. In the present work, an efficient absorbent of amino-functionalized ionic liquids (AFILs) was dissolved in ethanol-water solvent to form a novel biphasic solvent for CO₂ capture. When the concentration of triethylenetetramine l-lysine ([TETAH][Lys]) was 0.5 mol/L and the volume ratio of ethanol-water solvent was 4:6, the [TETAH][Lys] solution separated into two phases after CO₂ absorption. Under the optimal conditions, the volume of the CO₂-rich phase was about one third of the total volume of the mixture, which meant that only one third of the solution needed to be regenerated and the energy consumption could be greatly reduced. Meanwhile, the loading of the CO₂-rich phase contributed about 93% of the total loading of the solution, and its viscosity was only 27.95 mPa s. The regeneration efficiency of the solvent after the 5th absorption-desorption cycle still kept at 91.3%. Based on the experimental and ¹³C NMR analysis results, the reaction and phase change mechanisms of CO₂ capture into the [TETAH][Lys]-ethanol-water solution were clarified. CO₂ absorption into [TETAH][Lys] firstly formed carbamate, which would further hydrolyze to HCO₃⁻/CO₃²⁻ and react with ethanol to form the ethyl carbonate. Due to the limited solubility of these absorption products in ethanol, as well as the good solubility in H₂O, the products transferred to the lower phase while the ethanol stayed in the upper phase in the biphasic system.

由于双相溶剂具有巨大的节能潜力，因此引起了越来越多的关注。在目前的工作中，将氨基官能化离子液体（AFIL）的有效吸收剂溶解在乙醇-水溶剂中，以形成用于CO ₂捕集的新型双相溶剂。当三亚乙基四胺1-赖氨酸（[TETAH] [Lys]）的浓度为0.5 mol / L，乙醇-水溶剂的体积比为4：6时，[TETAH] [Lys]溶液在CO ₂分离后分成两相吸收。在最佳条件下，CO ₂的体积富集相大约占混合物总体积的三分之一，这意味着只需要再生三分之一的溶液，就可以大大降低能耗。同时，富含CO _2的相的负载占溶液总负载的约93％，并且其粘度仅为27.95 mPa s。第五次吸附-解吸循环后溶剂的再生效率仍保持在91.3％。根据实验结果和¹³ C NMR分析结果，阐明了CO ₂捕集到[TETAH] [Lys]-乙醇-水溶液中的反应和相变机理。CO ₂吸收到[TETAH] [赖氨酸]首先形成氨基甲酸酯，这将进一步水解以HCO ₃ ^-/ CO ₃ ^2-并与乙醇反应形成碳酸乙酯。由于这些吸收产物在乙醇中的溶解度有限，以及在H ₂ O中的良好溶解度，产物转移到较低相，而乙醇在双相系统中停留在较高相中。