https://hdl.handle.net/10259/10448 Tue, 21 Apr 2026 06:43:30 GMT 2026-04-21T06:43:30Z 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 https://hdl.handle.net/10259/11399 Density, Viscosity, and Derivative Properties of Diethylene Glycol Monoethyl Ether Under High Pressure and Temperature Lifi, Mohamed; Bazile, Jean Patrick; Muñoz Rujas, Natalia; Galliero, Guillaume; Aguilar Romero, Fernando; Daridon, Jean Luc The measurement of densities (ρ) of the pure component diethylene glycol monoethyl ether (2-(2-ethoxyethoxy)ethanol) has been carried out using a vibrating-tube densimeter (Anton Paar DMA HPM) along temperatures varying from 293.15 to 353.15 K and pressures from 0.1 to 70 MPa with an expanded uncertainty of 0.5 kg·m–3. High-pressure dynamic viscosity (η) measurements were performed with a falling body viscometer at pressure values up to 70 MPa and within a temperature range from 293.15 to 353.15 K with an expanded relative uncertainty of 0.03η. The dynamic viscosity was determined at 0.1 MPa, thanks to an Ubbelohde capillary viscometer, with an expanded relative uncertainty smaller than 0.01η. Density experiments were adjusted using a Tait-like equation and modeled by employing the perturbed-chain statistical associating fluid equation of state (EoS). Moreover, high-pressure dynamic viscosity experimental data were correlated using the Vogel–Fulcher–Tammann (VFT) equation. Mon, 01 Mar 2021 00:00:00 GMT https://hdl.handle.net/10259/11399 2021-03-01T00:00:00Z https://hdl.handle.net/10259/11380 Excess enthalpy, density, speed of sound and refractive index of binary mixtures {2-(2-ethoxyethoxy)ethanol + 1-hexene, or cyclohexane, or methylcyclohexane at (298.15 and 313.15) K: Application of the PPR-78 cubic equation of state, NRTL and UNIQUAC models Lifi, Mohamed; Lorenzo, Jorge; Aguilar Romero, Fernando; Muñoz Rujas, Natalia; Montero García, Eduardo; Chhiti, Younes; Alaoui, Fatima E. M. Excess enthalpy, HE, density, , speed of sound, u, and refractive index, , measured data (312 points) are presented for {2-(2-ethoxyethoxy)ethanol (carbitol) with 1-hexene, or cyclohexane, or methylcyclohexane} at 0.1 MPa and (298.15 and 313.15) K throughout the full range of composition. Consequently, derivative properties were determined from the reported experimental data: , excess volume, , isentropic compressibility, , deviation in isentropic compressibility, , deviation in refractive index. The modified Redlich-Kister is employed for the experimental data correlation of HE, while the Predictive Peng-Robinson 1978 (PPR78) EoS is used to model the measured data of HE. As a comparison with PPR78 EoS, the NRTL and UNIQUAC models are applied to have a prediction on the experimental HE data. Also, the Redlich-Kister equation is employed to fit the excess volume, deviation in isentropic compressibility and deviation in refractive index. In the present work, we have discussed intermolecular interactions for the studied binary mixtures. Mon, 01 Feb 2021 00:00:00 GMT https://hdl.handle.net/10259/11380 2021-02-01T00:00:00Z https://hdl.handle.net/10259/11258 Biofuels as a sustainable energy solution: Density measurement and modeling of waste cooking oil and DBE blend Yatim, Fatima Ezzahra; Samadi, Khaoula; Abala, Ilham; Lifi, Mohamed; Muñoz Rujas, Natalia; Aguilar Romero, Fernando; Alaoui, Fatima E. M. Bioenergy and biofuels are at a critical stage of development. Their role in decarbonising the transport sector, particularly in reducing emissions from shipping and aviation, is widely recognized. Waste Cooking Oil Biodiesel (WCOB) is a promising biofuel, due to its economic viability and sustainability. Additionally, oxygenated additives, such as Dibutyl Ether (DBE), enhance the properties of biofuel blends by improving combustion efficiency and reducing emissions. In this study, the density of WCOB and DBE, was systematically investigated under controlled temperature and pressure conditions. Four mixtures with mass fractions of 0.3500, 0.4998, 0.6750, and 0.8492 were prepared. Density measurements were performed over a temperature range of 298.15 K–393.15 K and a pressure range of 1–140 MPa. The Tait equation was used to correlate the experimental density data, which were subsequently used to determine the derived thermodynamic properties of isobaric expansion and isothermal compressibility. The blend density was also predicted using the PC-SAFT equation of state and artificial neural networks (ANN). Models accuracy was evaluated and discussed using a statistical metrics. The ANN model provided the best accuracy for the complete dataset, with AAD = 0.1246 %, MD = 2.3046 % and RMSE = 1.84.10−3, demonstrating its effectiveness in predicting blend densities. Mon, 01 Sep 2025 00:00:00 GMT https://hdl.handle.net/10259/11258 2025-09-01T00:00:00Z