Biphasic solvents are promising candidates for CO₂ capture for low regeneration energy consumption. In this study, a novel phase splitter 1-methylimidazole (1-MI) was proposed for triethylenetetramine (TETA) aqueous solvent. 1-MI was proved to act as a phase splitter to induce the phase separation and as an absorption promoter to enhance the absorption rate. By tuning the concentrations of TETA and 1-MI, good phase separation performance was obtained in TETA-1-MI biphasic solvent, achieving a CO₂-rich phase loading of 5.41 mol/L. ¹³C NMR revealed that the upper layer was the CO₂-lean phase, containing 1-MI and a small amount of water, while the lower layer was the CO₂-rich phase and mainly comprised of TETAH⁺ and TETA-carbamate. The kinetics results based on the double-film theory indicated that the CO₂ absorption rate was mainly controlled by the gas film mass transfer resistance at lower CO₂ loading and then by liquid film mass transfer resistance when CO₂ loading was higher than 1 mol/L. Owing to the good phase separation behavior triggered by 1-MI, the regeneration heat of TETA-1-MI was 2.26 GJ/t CO₂, which was comparable to that of the second-generation solvents, and 43.5 % lower than that of 5 M monoethanolamine (MEA). The present findings indicated that TETA-1-MI had a large loading capacity, high absorption rate, and low energy consumption, which can serve as a novel candidate for CO₂ capture.

双相溶剂是用于CO ₂捕集的有前途的候选物，以降低再生能量的消耗。在这项研究中，提出了一种新的分相器1-甲基咪唑（1-MI）用于三亚乙基四胺（TETA）水性溶剂。事实证明1-MI可作为分相剂以诱导相分离，并作为吸收促进剂以提高吸收速率。通过调节TETA和1-MI的浓度，在TETA-1-MI两相溶剂中获得了良好的相分离性能，实现了5.41 mol / L的富含CO _2的相负载。¹³ C NMR显示，上层为贫CO ₂相，含有1-MI和少量水，而下层为富CO ₂相，主要由TETAH组成⁺和TETA-氨基甲酸酯。基于双膜理论的动力学结果表明，CO _2的吸收速率主要受较低CO ₂负载下的气膜传质阻力控制，然后受CO ₂负载高于1 mol / g时的液膜传质阻力控制。L. 由于1-MI引发的良好的相分离行为，TETA-1-MI的再生热为2.26 GJ / t CO ₂，与第二代溶剂相当，比5降低了43.5％。 M一乙醇胺（MEA）。目前的发现表明，TETA-1-MI的负载量大，吸收率高，能耗低，可作为新型的CO ₂候选物。 捕获。