Abstract
Solid–liquid equilibria (SLE) of binary mixtures of several n-alkanes (n-octadecane, n-eicosane, n-tetracosane, n-pentacosane, n-triacontane) and dibenzofuran covering the whole composition range were measured by differential scanning calorimetry (DSC) in a temperature range of 301–356 K. The dibenzofuran and the n-alkanes are completely miscible in the liquid state but non-miscible in the solid state, and in the context of this work, they seem to exhibit eutectic behavior. A linear trend is obtained for the eutectic temperature and eutectic composition versus the number of carbon atoms of n-alkane. The experimental data were compared to predictions made by using the ideal solution model, the DISQUAC model and several versions of the UNIFAC model, including the classical UNIFAC, the modified versions of Lyngby and Dortmund, and the recently proposed modified UNIFAC (NIST) model, to account for non-ideality in the liquid phase. Moreover, the experimental data were also compared with COSMO-RS predictions that utilize quantum chemical calculations and statistical thermodynamics to interpret the behavior of molecular interactions in the binary mixture. A good agreement was obtained between the predicted and the experimental temperatures.
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Acknowledgements
Dr. BOUDOUH wishes to express his gratitude to Pr. Juan Antonio González, Professor at the University of Valladolid, Spain, for having welcomed him to the G.E.T.E.F Laboratory. Dr. Hadj-Kali also expresses his appreciation to the Researchers Supporting Project (RSP2023R361), King Saud University, Riyadh, Saudi Arabia.
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Issam Boudouh: Conceptualization, Investigation, Writing – review & editing, Visualization, Validation. Baudilio Coto: Investigation, Writing – review & editing, Visualization, Software, Data curation, Validation, Supervision. Juan Antonio González: Conceptualization, Investigation, Writing – original draft, Visualization, Software, Data curation, Validation, Supervision. Irfan Wazeer: Investigation, Data curation, Writing – review & editing. M. Zulhaziman M. Salleh: Investigation, Writing – review & editing, Visualization, Software, Data curation, Validation. Ismahane Djemai: Writing – review & editing. Maria Dolores Robustillo: Investigation, Data curation, Writing – review & editing. Mohamed K. Hadj-Kali: Investigation, Writing – review & editing, Visualization, Software, Data curation, Validation.
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Boudouh, I., Coto, B., González, J.A. et al. Experimental Data and Modeling of Solid–Liquid Equilibria of Binary Systems Containing Dibenzofuran and Long Chain n-alkanes. J Solution Chem 52, 1083–1106 (2023). https://doi.org/10.1007/s10953-023-01297-w
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DOI: https://doi.org/10.1007/s10953-023-01297-w