The gas drying technology with ionic liquids (ILs) was systematically studied ranging from the molecular level to industrial scale. The COSMO-RS model was first used to screen the suitable IL and provide theoretical insights at the molecular level. Toward CO₂ gas dehydration, we measured the CO₂ solubility in single [EMIM][Tf₂N] and in the [EMIM][Tf₂N] + H₂O mixture, as well as the vapor-liquid equilibrium (VLE) of [EMIM][Tf₂N] + H₂O system, to justify the applicability of UNIFAC model. Based on the thermodynamic study, the rigorous equilibrium (EQ) stage mathematical model was established for process simulation. The gas drying experiment with IL was also performed and the water content in gas product can be reduced to 375 ppm. It was confirmed that a less flow rate of absorbent, a higher CO₂ recovery ratio and a much lower energy consumption can be achieved with IL than with the conventional triethylene glycol (TEG). © 2017 American Institute of Chemical Engineers AIChE J, 2017

中文翻译：

---

用离子液体进行气体干燥

从分子水平到工业规模，系统地研究了使用离子液体（ILs）的气体干燥技术。COSMO-RS模型首先用于筛选合适的IL，并在分子水平上提供理论见解。对于CO ₂气体脱水，我们测量了单一[EMIM] [Tf ₂ N]和[EMIM] [Tf ₂ N] + H ₂ O混合物中的CO ₂溶解度，以及气液平衡（VLE） [EMIM] [Tf ₂ N] + H _2的O系统，以证明UNIFAC模型的适用性。基于热力学研究，建立了严格的平衡（EQ）阶段数学模型用于过程仿真。还进行了用IL进行的气体干燥实验，气体产品中的水含量可以降低到375 ppm。已经证实，与传统的三甘醇（TEG）相比，IL可以实现吸收剂的流速更低，CO ₂回收率更高，能耗更低。©2017美国化学工程师学会AIChE J，2017