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Measurement and Correlation of the Vapor-Liquid Equilibrium of Cyclohexane + Ethanol Containing ILs and the Thermophysical Properties of these ILs at 101.3 kPa
The Journal of Chemical Thermodynamics ( IF 2.6 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.jct.2020.106203
Wenxiu Li , Yu Zhang , Honghui Li , Ruizhe Lu , Hongfan Guo , Jipeng Li , Jinling Chen , Tao Zhang

Abstract Some important topics and issues related to possible extractive distillation separation of cyclohexane + ethanol system using ionic liquids (ILs) are presented in this manuscript. Three ILs with acetate anion (methyl-trioctyl-ammonium acetate [N1,8,8,8][Ac], 1-decyl-3-methyl-imidazolium acetate [DMIM][Ac] and 1-hexadecyl-3-methyl-imidazolium acetate [C16MIM][Ac]) were selected as entrainers. The vapor–liquid phase equilibrium (VLE) data for cyclohexane + ethanol + ILs system were determined at 101.3 kPa and correlated by Wilson and NRTL models. The separation effect of these ILs on the basis of the NRTL model follows this order: [N1,8,8,8][Ac] > [DMIM][Ac] > [C16MIM][Ac]. The binary VLE data of the cyclohexane-ethanol mixture obtained by this device were compared with previously published data and tested by the Herington thermodynamic consistency test. Temperature dependence of some thermophysical properties (density, viscosity and heat capacity) of these ILs were obtained and correlated within the range of possible distillation operating temperatures.

中文翻译:

含环己烷 + 乙醇的离子液体的汽液平衡的测量和相关性以及这些离子液体在 101.3 kPa 时的热物理性质

摘要 本手稿介绍了与使用离子液体 (IL) 对环己烷 + 乙醇系统进行可能的萃取蒸馏分离相关的一些重要主题和问题。三个带有乙酸根阴离子的离子液体(甲基-三辛基-乙酸铵 [N1,8,8,8][Ac]、1-decyl-3-methyl-imidazolium acetate [DMIM][Ac] 和 1-hexadecyl-3-methyl-咪唑鎓醋酸盐 [C16MIM][Ac]) 被选为夹带剂。环己烷 + 乙醇 + ILs 系统的汽液相平衡 (VLE) 数据在 101.3 kPa 下确定,并通过 Wilson 和 NRTL 模型进行关联。这些基于 NRTL 模型的 IL 的分离效果遵循以下顺序:[N1,8,8,8][Ac] > [DMIM][Ac] > [C16MIM][Ac]。通过该装置获得的环己烷-乙醇混合物的二元 VLE 数据与先前公布的数据进行了比较,并通过 Herington 热力学一致性测试进行了测试。获得了这些 IL 的一些热物理特性(密度、粘度和热容)的温度依赖性,并在可能的蒸馏操作温度范围内进行了关联。
更新日期:2020-11-01
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