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首页> 外文期刊>RSC Advances >Equilibria and correlation of systems involving 1-hexyl-3-methylpyridinium trifluoromethanesulfonate
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Equilibria and correlation of systems involving 1-hexyl-3-methylpyridinium trifluoromethanesulfonate

机译：均衡和涉及1-己基-3-甲基吡啶三氟甲磺酸盐的系统的相关性

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Ionic liquids are being proposed for the improvement of many refinery-related applications where water and oil coexist. However, the lack of relevant thermodynamic data on equilibrium processes involving water, oil and an ionic liquid is a stumbling block. Phase diagrams of these systems are complex, with many different regions, especially when the ionic liquid is solid at room conditions. This greatly complicates modelling, which is usually neglected or carried out only partially. In this work, for the first time, the simultaneous correlation not only of liquid-liquid and liquid-liquid-liquid but also solid-liquid equilibrium data for ternary systems involving ionic liquids has been carried out. To that end, the ionic liquid 1-hexyl-3-methylpyridinium trifluoromethanesulfonate, with an alkyl chain length that favours nano-segregation, was selected. Phase diagrams with water and different representative oils (octane, toluene and cyclohexane) have been determined at various temperatures and atmospheric pressure. The great capacity of the NRTL model, a powerful tool used in all chemical process simulators, was shown by simultaneously correlating data from all the equilibrium regions. However, adequate equilibrium equations and pivotal strategies were required. Low deviations and a good representation of phase diagrams was achieved. A topological analysis based on the Gibbs common tangent criterion and a stability test allowed validation of the proposed correlation parameters.
机译：被提议的许多炼油厂相关的应用中，水和油共存的改善离子液体。然而，由于缺乏对涉及水，油和离子液体平衡过程相关的热力学数据的是绊脚石。这些系统的相图是复杂的，有许多不同的区域，特别是当离子液体是在室温条件下为固体。这极大地复杂建模，这通常是被忽视或进行仅部分。在这项工作中，在第一次，不仅涉及离子液体三元体系液 - 液和液 - 液 - 液，而且固 - 液平衡数据的同时相关已经进行了。为此目的，所述离子液体1-己基-3-甲基吡啶鎓三氟甲烷磺酸盐，与烷基链长度有利于纳米偏析，被选中。用水和不同代表油（辛烷，甲苯和环己烷）相图已经在各种温度和大气压力下被确定。的NRTL模型，在所有的化学过程模拟器使用的强大的工具的容量大，通过同时从所有的平衡区域数据相关所示。然而，要求足够的平衡方程和举足轻重的战略。低偏差和相图的一个很好的代表达到了。基于吉布斯公切线标准和提议的相关参数的稳定性试验允许验证甲拓扑分析。

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    《RSC Advances》 |2019年第72期|共9页
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  • 正文语种 eng
  • 中图分类 化学;
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