Carbon capture using an ionic liquid as the solvent has been considered to be an effective way to reduce CO₂ emissions. This study aimed to investigate ionic liquid (IL)-based carbon dioxide capture and storage processes compared with the MEA-based process from a power plant’s flue gas. Ionic liquid 1-Butyl-3-methylimidazolium Bis(trifluoromethanesulfonyl) ([bmim][Tf₂N]) was used as the solvent. The COSMO-SAC model was selected as the property method for all of the simulations. Based on sensitivity analysis optimization, the optimal process was obtained and the energy saving ratio (ESR) and primary cost saving ratio (PCS) were calculated. The results showed that the ionic liquid-based process performed better than the process using traditional organic solvents monoethanol-amine (MEA) in terms of cost. Due to the non-volatility of ionic liquids, two flash tanks were used instead of the solvent recovery stripper. The ionic liquid process led to 30.01% savings on energy consumption and 29.99% savings on the primary cost. The specific electricity of the CO₂ storage was 237 kWh/t (CO₂) and 124 kWh/t (CO₂) in the two processes. Because the output pressure of CO₂ from the IL-based process was lower than that from the MEA-based process, more energy consumption was required.

使用离子液体作为溶剂进行碳捕集已被认为是减少CO ₂排放的有效方法。这项研究旨在研究与电厂烟气中基于MEA的过程相比，基于离子液体（IL）的二氧化碳的捕获和存储过程。离子液体1-丁基-3-甲基咪唑双（三氟甲磺酰基）（[bmim] [Tf ₂N 1）用作溶剂。选择COSMO-SAC模型作为所有模拟的属性方法。基于灵敏度分析优化，获得了最佳工艺，并计算了节能比（ESR）和一次成本节省比（PCS）。结果表明，基于离子液体的工艺在成本方面比使用传统有机溶剂单乙醇胺（MEA）的工艺更好。由于离子液体的非挥发性，因此使用了两个闪蒸罐来代替溶剂回收汽提塔。离子液体工艺可节省30.01％的能耗，并节省29.99％的基本成本。CO ₂储存的比电为237 kWh / t（CO ₂）和124 kWh / t（CO ₂）在两个过程中。因为基于IL的过程的CO ₂的输出压力低于基于MEA的过程的CO ₂的输出压力，所以需要更多的能耗。