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Thermal conductivity of ionic liquids under pressure
Fluid Phase Equilibria ( IF 2.6 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.fluid.2020.112573
Francisco Yebra , Jacobo Troncoso , Luis Romaní

Abstract Thermal conductivity of eight ionic liquids has been measured in the temperature and pressure intervals (288.15–313.15) K and (0.1–65) MPa, selected to have a common ion. Values within the interval (0.12–0.2) W·m−1·K−1 are found for these compounds. Thermal conductivity decreases with temperature and increases with pressure for all ionic liquids. The experimental results are compared with literature data, obtaining satisfactory agreement. The thermal conductivity data are discussed by taking into account the chemical nature of the compounds. The Bridgman equation and a heuristic modification of the Enskog theory are applied to quantitatively analyze the experimental data. This theoretical analysis is extended to other compounds to get a wider picture and thus, elucidate the main factors that could affect the thermal conductivity of ionic liquids. Finally, the prediction capability of these two theoretical approaches is evaluated using the reported thermal conductivity data.

中文翻译:

离子液体在压力下的热导率

摘要 在温度和压力区间 (288.15–313.15) K 和 (0.1–65) MPa 内测量了八种离子液体的热导率,选择具有共同离子。这些化合物的值在区间 (0.12–0.2) W·m-1·K-1 内。对于所有离子液体,热导率随温度降低而随压力增加。将实验结果与文献数据进行对比,取得了满意的结果。通过考虑化合物的化学性质来讨论热导率数据。Bridgman 方程和 Enskog 理论的启发式修改应用于定量分析实验数据。这种理论分析扩展到其他化合物以获得更广泛的画面,因此,阐明影响离子液体导热系数的主要因素。最后,使用报告的热导率数据评估这两种理论方法的预测能力。
更新日期:2020-07-01
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