To improve the performance of an absorption system, ionic liquids (ILs) have been chosen as additives to conventional working fluid (lithium bromide aqueous solution) in recent years. In this paper, 1-ethyl-3-methylimidazolium acetate ([Emim]Ac) was added to lithium bromide aqueous solution (mass ratio LiBr/[Emim]Ac = 3) to measure the vapor–liquid equilibrium (VLE) data of the ternary system. The experiment was conducted by means of boiling point method, at temperatures between 303.94 K and 405.41 K and mass fractions of absorbent between 0.20 and 0.60. The experimental data were regressed using an Antoine-type equation, and the average absolute relative deviation (AARD%) between the experimental and calculated values was 0.34%, which showed excellent accuracy and consistency. The experimental ternary system was compared with the conventional LiBr + H₂O system and two other ternary systems from the literature; the result revealed that the experimental ternary system had lower vapor pressures, which will benefit the process of releasing latent heat in absorption cycles.

中文翻译：

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水，溴化锂和乙酸1-乙基-3-甲基咪唑鎓三元体系三元体系的蒸气压测量

为了改善吸收系统的性能，近年来，已选择离子液体（IL）作为常规工作流体（溴化锂水溶液）的添加剂。在本文中，将乙酸1-乙基-3-甲基咪唑鎓乙酸盐（[Emim] Ac）添加到溴化锂水溶液中（质量比LiBr / [Emim] Ac = 3），以测量该溶液的气液平衡（VLE）数据。三元系统。通过沸点法在303.94 K和405.41 K之间的温度下以及吸收剂的质量分数在0.20和0.60之间的条件下进行实验。使用Antoine型方程对实验数据进行回归，实验值与计算值之间的平均绝对相对偏差（AARD％）为0.34％，显示出极好的准确性和一致性。_{文献中有2} O系统和另外两个三元系统；结果表明，实验三元系统的蒸气压较低，这将有利于吸收循环中释放潜热的过程。