The CO₂ absorption capacity in three hybrid solvents based on butyl-3-methylimidazolium acetate ([Bmim][OAc]) and three different cosolvents (Dimethyl ethers of polyethylene glycol (DEPG250), propylene carbonate, and water) was investigated and compared, and [Bmim][OAc]-DEPG250 shows the highest CO₂ absorption capacity. The effects of the mass ratio of [Bmim][OAc]-DEPG250 and temperature on their CO₂ absorption capacity, density, and viscosity were further investigated. In addition, the absorption capacities of N₂ and CO₂ in [Bmim][OAc]-DEPG250 with the simulated flue gas as a feed gas were studied and compared with that using the pure gas as a feed gas. Thermodynamic models were used to represent the experimental data, and then process simulation and evaluation were carried out. The results show that the addition of DEPG250 dramatically decreases the viscosity, while the absorption capacity of hybrid solvents is still comparable with pure [Bmim][OAc]. The type of gas stream, that is, pure gas or gas mixture, has a negligible effect on the N₂ and CO₂ absorption capacity. The simulation results show that [Bmim][OAc]-DEPG250 only utilizes less than 50% of the heating duty of aqueous amine solution because of the low-pressure desorption and preheating with waste heat in this hybrid solvent-based process. The CO₂ capture cost of using this [Bmim][OAc]-DEPG250 reduces by 11% compared with that of using aqueous amine solution due to the significant decrease (by 52%) in utility cost.

研究并比较了基于丁基-3-甲基咪唑鎓醋酸盐 ([Bmim][OAc]) 和三种不同助溶剂（聚乙二醇二甲醚 (DEPG250)、碳酸丙烯酯和水）的三种混合溶剂中的 CO ₂吸收能力， [Bmim][OAc]-DEPG250显示出最高的CO ₂吸收能力。进一步研究了[Bmim][OAc]-DEPG250 的质量比和温度对其CO ₂吸收能力、密度和粘度的影响。此外，N ₂和 CO ₂的吸收能力在[Bmim][OAc]-DEPG250中以模拟烟气为原料气进行了研究，并与以纯气为原料气的情况进行了比较。用热力学模型来表示实验数据，然后进行工艺模拟和评价。结果表明，DEPG250的加入显着降低了粘度，而混合溶剂的吸收能力仍与纯[Bmim][OAc]相当。气流的类型，即纯气体或气体混合物，对 N ₂和 CO _{2 的}影响可以忽略不计吸收能力。模拟结果表明，[Bmim][OAc]-DEPG250 仅利用了胺水溶液的不到 50% 的加热负荷，因为在这种基于混合溶剂的过程中进行了低压解吸和废热预热。与使用胺水溶液相比，使用这种 [Bmim][OAc]-DEPG250的 CO ₂捕获成本降低了 11%，因为公用事业成本显着降低（52%）。