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1-羟乙基-3-甲基咪唑氯盐([HOEtMIM][Cl])是一种亲水性极强的离子液体,与水可以组成吸收式制冷工质对,具有良好的工业应用前景.在制冷工程应用中,离子液体水溶液的低温特性研究非常重要,包括低温段的水溶液蒸汽压数据和凝固特性,而[HOEtMIM][Cl]的相关研究缺乏.本文对水的质量分数分别为17.10%、24.29%、38.03%、49.89%、69.94%,温度范围(278.15K~408.15K)的[HOEtMIM][Cl]水溶液的汽液相平衡进行了测定;并对水的质量分数范围为1.3%~90.0%,温度范围为150K~360K的离子液体水溶液的凝固特性进行了测定,揭示其在低温应用时可能出现的固化问题.获得的蒸汽压及凝固特性数据对该离子液体水溶液应用于制冷系统设计具有重要意义.
1-Hydroxyethyl-3-methylimidazolium chloride ([HOEtMIM] [Cl]) is a highly hydrophilic ionic liquid that can form an absorption refrigeration pair with water and has good industrial application prospects In the application of refrigeration engineering, it is very important to study the low temperature property of ionic liquid aqueous solution, including the vapor pressure data and the solidification property of aqueous solution in low temperature range, but the relative research of [HOEtMIM] [Cl] is lacking.The mass fraction of water is 17.10 The liquid-vapor phase equilibrium of [HOEtMIM] [Cl] aqueous solution was measured at different temperature (%), 24.29%, 38.03%, 49.89%, 69.94% and temperature range (278.15K ~ 408.15K). The mass fraction of water ranged from 1.3% ~ 90.0%, and the temperature range of 150K ~ 360K was measured to reveal the curing problems that may occur in low temperature applications.The obtained vapor pressure and solidification characteristics of the ionic liquid aqueous solution used in the refrigeration system Design is of great importance.