https://hdl.handle.net/10259/4708 Fri, 15 May 2026 22:46:50 GMT 2026-05-15T22:46:50Z https://hdl.handle.net/10259/11616 Experimental and modeling insights into excess molar enthalpy of alcohol–additive ternary mixtures at 298.15 and 313.15 K Samadi, Khaoula; Lifi, Mohamed; Briones Llorente, Raúl; Aguilar Romero, Fernando; Alaoui, Fatima E. M. The increasing demand for cleaner energy carriers has intensified interest in liquid fuel blends containing oxygenated compounds such as alcohols and glycol ethers. These additives improve combustion efficiency and reduce environmental impact. In this work, excess molar enthalpies were determined for a binary mixtures (ethanol + 1-propanol; diethylene glycol monoethyl ether + 1-propanol; and ethylene glycol monophenyl ether + ethanol) as well as for four ternary mixtures: diethylene glycol monomethyl ether (1) + 1-propanol (2) + ethanol (3), diethylene glycol monoethyl ether (1) + 1-propanol (2) + ethanol (3), ethylene glycol monomethyl ether (1) + 1-propanol (2) + ethanol (3), and ethylene glycol monophenyl ether (1) + 1-propanol (2) + ethanol (3). Measurements were obtained with a quasi-isothermal flow calorimeter at 298.15 K and 313.15 K under 0.1 MPa, conditions representative of typical industrial applications. The experimental data were then correlated using the Redlich–Kister equation for the binary system and the NRTL, UNIQUAC, and modified UNIFAC (Dortmund) models for the ternary systems, enabling evaluation of both mixture behavior and model accuracy. The findings expand the thermodynamic database for alcohol- and glycol ether-based blends and provide benchmarks for simulation and design in energy and petrochemical processes. Sun, 01 Mar 2026 00:00:00 GMT https://hdl.handle.net/10259/11616 2026-03-01T00:00:00Z https://hdl.handle.net/10259/11603 Thermophysical Analysis and Molecular Modeling of 2-Propanol–Glycol Ether Mixtures Between 293.15 K and 323.15 K: Implications for Renewable Fuel Formulations Samadi, Khaoula; Lifi, Mohamed; Muñoz Rujas, Natalia; Alaoui, Fatima E. M.; Aguilar Romero, Fernando Short-chain alcohols and glycol ethers are increasingly being considered as promising additives or components in biofuels due to their favorable physicochemical properties and alignment with the growing demand for sustainable and low-emission energy sources in the transportation sector. This study presents experimental data for five binary mixtures of 2-propanol with glycol ethers: 2-(2-methoxyethoxy)ethanol, 2-(2-ethoxyethoxy)ethanol, 2-methoxyethanol, 2-phenoxyethanol, and 2-butoxyethanol. Measurements of excess molar enthalpy (), density (ρ), speed of sound (u), and refractive index (nD) were performed over the temperature range 293.15 K–323.15 K at 0.1 MPa. Derivative thermodynamic properties, excess molar volume (), isentropic compressibility (ks), and refractive index deviation (ΔnD), were calculated from the experimental data. Density data were correlated using PC-SAFT and Peng–Robinson equations of state, while polynomial equations were employed to fit ρ, u, nD, and ks as functions of composition. The Redlich–Kister equation was used to fit and ΔnD. Excess molar enthalpy () was modeled using both the Redlich–Kister correlation and thermodynamic activity coefficient models, UNIQUAC, NRTL, and Modified UNIFAC, to interpret molecular interactions. All the studied mixtures exhibit endothermic behavior. The results contribute to a deeper understanding of the behavior of alcohol/glycol ether mixtures and their potential application in fuel formulations. Wed, 01 Oct 2025 00:00:00 GMT https://hdl.handle.net/10259/11603 2025-10-01T00:00:00Z https://hdl.handle.net/10259/11457 High-Pressure Volumetric Properties of the Binary Mixtures (Di-isopropyl Ether + n-Heptane or Methylcyclohexane) Dakkach, Mohamed; Rubio Pérez, Gabriel; Alaoui, Fatima E. M.; Muñoz Rujas, Natalia; Aguilar Romero, Fernando; Montero García, Eduardo This work reports the experimental density data for the binary mixtures of n-heptane or methylcyclohexane + di-isopropyl ether, measured over the full composition range between 0.1 and 140 MPa, and for temperatures from 298.15 to 393.15 K, by means of a vibrating tube densitometer calibrated with an uncertainty of 0.0007 g·cm–3. Then, the experimental density data were fitted using a Tait-like equation to derive mixing thermodynamic coefficients, including the isobaric expansivity and isothermal compressibility. Finally, the excess volumes of the abovementioned binary mixtures were calculated, and their nonideal behavior was investigated. Thu, 01 Oct 2020 00:00:00 GMT https://hdl.handle.net/10259/11457 2020-10-01T00:00:00Z https://hdl.handle.net/10259/11400 Thermophysical properties of binary liquid mixtures of oxygenated compounds: 2-Methoxyethanol + alcohols at T = 298.15 K and 313.15 K Lifi, Mohamed; Abala, Ilham; Muñoz Rujas, Natalia; Aguilar Romero, Fernando; Montero García, Eduardo; Negadi, Latifa; Alaoui, Fatima E. M. Thermophysical properties as density, ( ), dynamic and kinematic viscosities, ( , ), refractive index, ( ), and excess enthalpy, (HE), are presented in this present work for binary mixtures containing 2-methoxyethanol, 1-butanol, 2-butanol, and 1-propanol at T = (298.15 and 313.15) K and at p = 0.1 MPa, over the whole range of composition. Derivative properties such as excess volume, ( ), and deviations in refractive index, ( ), were calculated from the measured data of density and refractive index, respectively. The Perturbed Chain-Statistical Associating Fluid (PC-SAFT) Equation of State is used to correlate the experimental data density for the studied binary mixtures. Also, the Redlich-Kister equation is employed to fit the excess volumes, deviations in refractive index, and excess enthalpies. Besides, the NRTL and UNIQUAC models are applied to correlate the measured data of excess enthalpy, (HE). Moreover, intermolecular interactions have been discussed for the studied binary mixtures. Sat, 01 Jan 2022 00:00:00 GMT https://hdl.handle.net/10259/11400 2022-01-01T00:00:00Z