Ionic liquid (IL)-amine hybrid solvents have been proved to be an energy-saving system for CO₂ capture. Lack of experimental information on the diffusivity and heat of CO₂ absorption in IL-amine hybrid solvents hampers the wide application of IL in CO₂ capture. In this work, the effects of IL on absorption rate, solubility, diffusivity and heat of CO₂ absorption in feasible hybrids of 1-butyl-3-methyl-imidazolium nitrate ([Bmim][NO₃]) and monoethanolamine (MEA) have been elaborated using weight method, vapor liquid equilibrium and calorimetric measurement. The results showed that the addition of IL slightly decreases CO₂ loading under atmospheric pressure. Based on the measured solubility and calorimeter results, IL is beneficial to improve the physical absorption of CO₂ and reduce the heat of absorption in IL-amine hybrids. The diffusivity of CO₂ can be maintained at an acceptable level by controlling the concentration of IL. Considering CO₂ capacity, kinetics and heat of absorption, the hybrids of 30% MEA + 10% [Bmim][NO₃] + 60% H₂O were recommended. Our work gives the meaningful insights on designing novel IL-amine hybrids for CO₂ capture.

离子液体（IL）-胺杂化溶剂已被证明是用于CO ₂捕集的节能系统。缺乏有关IL-胺杂化溶剂中CO ₂吸收的扩散性和热量的实验信息，妨碍了IL在CO ₂捕集中的广泛应用。在这项工作中，IL对硝酸1-丁基-3-甲基咪唑鎓硝酸盐（[Bmim] [NO ₃ ]）和单乙醇胺（MEA）的可行混合物的吸收速率，溶解度，扩散率和CO ₂吸收热的影响具有用重量法，气液平衡法和量热法进行了详细说明。结果表明，添加IL会稍微降低CO ₂在大气压下加载。根据测得的溶解度和量热仪结果，IL有利于改善CO ₂的物理吸收并减少IL-胺杂化物中的吸收热。通过控制IL的浓度，可以将CO ₂的扩散率维持在可接受的水平。考虑到CO _2的容量，动力学和吸收热，建议使用30％MEA + 10％[Bmim] [NO ₃ ] + 60％H ₂ O的混合物。我们的工作为设计用于CO ₂捕集的新型IL-胺杂种提供了有意义的见解。