Estimation of transport properties and phase equilibrium of water or ethanol binary mixtures with ionic liquids

IF 2.2 3区工程技术 Q3 CHEMISTRY, PHYSICAL

Journal of Chemical Thermodynamics Pub Date : 2024-08-15 DOI:10.1016/j.jct.2024.107367

Elena Graczová, Pavol Steltenpohl

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引用次数: 0

Abstract

Density and viscosity of two trifluoromethanesulfonate-based ionic liquids: 1-ethylimidazolium trifluoromethanesulfonate, [Eim][Triflate], and 1-ethylpyridinium trifluoromethanesulfonate, [Epy][Triflate], as well as binary mixtures of these ILs with water or ethanol were measured within the temperature range of 293.15–333.15 K. Measured density data were used to calculate the excess molar volume and the component partial molar volume and the obtained values were fitted using the Redlich-Kister expansion. Variation of viscosity with the binary mixture composition and temperature was modeled using the Jouyban-Acree model. Data on the vapor−liquid equilibrium (VLE) of the respective ionic liquids with water and ethanol were estimated at atmospheric pressure over a wide range of IL concentrations (up to 70 mol% of IL). For the boiling point temperature measurement of four respective binaries, an adapted Siwoloboff procedure was used. To describe VLE of these binary mixtures, ideal vapor phase and real liquid phase behavior were assumed; experimental isobaric t–x data were correlated with the NRTL model.

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水或乙醇二元混合物与离子液体的传输特性和相平衡的估算

在 293.15-333.15 K 的温度范围内测量了两种基于三氟甲磺酸盐的离子液体：1-乙基咪唑三氟甲磺酸盐[Eim][Triflate]和 1-乙基吡啶三氟甲磺酸盐[Epy][Triflate]，以及这些离子液体与水或乙醇的二元混合物的密度和粘度。测量到的密度数据用于计算过量摩尔体积和组分部分摩尔体积，并使用 Redlich-Kister 扩展法对所得值进行拟合。粘度随二元混合物成分和温度的变化采用 Jouyban-Acree 模型进行模拟。在很大的离子液体浓度范围内（离子液体浓度最高达 70 摩尔%），在大气压力下估算了各自离子液体与水和乙醇的汽液平衡 (VLE) 数据。在测量四种二元化合物的沸点温度时，使用了经过改良的 Siwoloboff 程序。为了描述这些二元混合物的 VLE，假定了理想气相和真实液相行为；实验等压 t-x 数据与 NRTL 模型相关联。

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来源期刊

Journal of Chemical Thermodynamics 工程技术-热力学

CiteScore

5.60

自引率

15.40%

发文量

199

审稿时长

79 days

期刊介绍： The Journal of Chemical Thermodynamics exists primarily for dissemination of significant new knowledge in experimental equilibrium thermodynamics and transport properties of chemical systems. The defining attributes of The Journal are the quality and relevance of the papers published. The Journal publishes work relating to gases, liquids, solids, polymers, mixtures, solutions and interfaces. Studies on systems with variability, such as biological or bio-based materials, gas hydrates, among others, will also be considered provided these are well characterized and reproducible where possible. Experimental methods should be described in sufficient detail to allow critical assessment of the accuracy claimed. Authors are encouraged to provide physical or chemical interpretations of the results. Articles can contain modelling sections providing representations of data or molecular insights into the properties or transformations studied. Theoretical papers on chemical thermodynamics using molecular theory or modelling are also considered. The Journal welcomes review articles in the field of chemical thermodynamics but prospective authors should first consult one of the Editors concerning the suitability of the proposed review. Contributions of a routine nature or reporting on uncharacterised materials are not accepted.