Entrainer performance of a deep eutectic solvent glycerol–choline chloride 2:1 was tested for separation of ethanol and water. Isobaric vapor–liquid equilibrium data were measured at 101.3 kPa for the quaternary system water + ethanol + glycerol + choline chloride and were successfully modeled using the NRTL equation. Mean absolute deviations were 0.20 K for equilibrium temperature and 0.0038 for ethanol vapor mole fraction. The results showed that the azeotrope of ethanol and water can be removed at a solvent mole fraction of 0.028 with the addition of the deep eutectic solvent, indicating a better separation performance as compared with glycerol, which required a minimum solvent mole fraction of 0.047 for breaking the azeotrope.

中文翻译：

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甘油-氯化胆碱低共熔溶剂作为乙醇和水分离夹带剂的性能

测试了深共熔溶剂甘油-氯化胆碱 2:1 的夹带剂性能，用于分离乙醇和水。对于四元系统水 + 乙醇 + 甘油 + 氯化胆碱，在 101.3 kPa 下测量等压气液平衡数据，并使用 NRTL 方程成功建模。平衡温度的平均绝对偏差为 0.20 K，乙醇蒸气摩尔分数的平均绝对偏差为 0.0038。结果表明，加入深共熔溶剂后，乙醇和水的共沸物可以在0.028的溶剂摩尔分数下被去除，表明与甘油相比具有更好的分离性能，甘油的最小溶剂摩尔分数为0.047才能破共沸物。