2026-05-17T03:17:28Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/116102026-05-14T06:40:04Zcom_10259_9737com_10259_5086com_10259_2604col_10259_10448

Alcohol–Additive Ternary Mixtures for Sustainable Fuel Formulations: Experimental Excess Molar Enthalpy and Thermodynamic Modeling Yatim, Fatima Ezzahra Samadi, Khaoula Lifi, Mohamed Aguilar Romero, Fernando Alaoui, Fatima E. M. Excess Molar Enthalpy Ternary mixtures Oxygenated additives Redlich–Kister correlation Local composition Models Modified UNIFAC (Dortmund) model Termodinámica química Thermochemistry Fuel blends incorporating oxygenated additives are increasingly explored to enhance combustion efficiency and reduce greenhouse gas emissions. Understanding the thermodynamic behavior of such mixtures is essential for optimizing their formulation. In this study, the excess molar enthalpy () a key property reflecting molecular interactions and non-ideality was measured for four ternary blends containing 2-(2-methoxyethoxy)ethanol, 2-(2-ethoxyethoxy)ethanol, 2-methoxyethanol, and 2-phenoxyethanol, each mixed with ethanol, at 298.15 and 313.15 K under 0.1 MPa using a quasi-isothermal flow calorimeter. The experimental results were correlated using the Redlich–Kister, NRTL, and UNIQUAC models, while the predictive performance of the Modified UNIFAC (Dortmund) model was also assessed. Positive values were obtained for all mixtures, indicating endothermic mixing and dominant dispersive–dipolar interactions. Among the applied models, the Redlich–Kister equation provided the best correlation with experimental data. The results contribute valuable thermodynamic benchmarks for modeling the energetics of oxygenated fuel blends and improving predictive approaches for complex liquid mixtures. Open access funding provided by FEDER European Funds and the Junta de Castilla y León under the Research and Innovation Strategy for Smart Specialization (RIS3) of Castilla y León 2021-2027. No funding was obtained for this study. Open access funding provided by FEDER European Funds and the Junta De Castilla y León under the Research and Innovation Strategy for Smart Specialization (RIS3) of Castilla y León 2021-2027 2026-05-12T11:48:04Z 2026-05-12T11:48:04Z 2026-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 0195-928X https://hdl.handle.net/10259/11610 10.1007/s10765-025-03682-7 1572-9567 eng International Journal of Thermophysics. 2026, V. 47, n. 2, 32 https://doi.org/10.1007/s10765-025-03682-7 Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess application/pdf Springer