https://hdl.handle.net/10259/4707 2026-05-29T16:15:33Z 2026-05-29T16:15:33Z Samadi, Khaoula Lifi, Mohamed Briones Llorente, Raúl Aguilar Romero, Fernando Alaoui, Fatima E. M. https://hdl.handle.net/10259/11616 2026-05-15T08:03:13Z 2026-03-01T00:00:00Z

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.

2026-03-01T00:00:00Z Samadi, Khaoula Lifi, Mohamed Muñoz Rujas, Natalia Alaoui, Fatima E. M. Aguilar Romero, Fernando https://hdl.handle.net/10259/11603 2026-05-15T08:05:33Z 2025-10-01T00:00:00Z

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.

2025-10-01T00:00:00Z Dakkach, Mohamed Rubio Pérez, Gabriel Alaoui, Fatima E. M. Muñoz Rujas, Natalia Aguilar Romero, Fernando Montero García, Eduardo https://hdl.handle.net/10259/11457 2026-03-03T01:05:34Z 2020-10-01T00:00:00Z

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.

2020-10-01T00:00:00Z Briones Llorente, Raúl Muñoz Rujas, Natalia Martín, Alexander Millán García, José Antonio Rodríguez Sáiz, Ángel Aguilar Romero, Fernando Rubio Pérez, Gabriel https://hdl.handle.net/10259/11401 2026-02-19T01:05:47Z 2023-07-01T00:00:00Z

Comparative Study of Building Energy Simulation Software Applied to Research Projects. Cases of Study in Spain and Portugal Briones Llorente, Raúl; Muñoz Rujas, Natalia; Martín, Alexander; Millán García, José Antonio; Rodríguez Sáiz, Ángel; Aguilar Romero, Fernando; Rubio Pérez, Gabriel Architecture, Engineering and Construction are currently undergoing an energy-digital transition towards a decarbonised and sustainable scene. Energy assessment of buildings through Building Energy Modelling tools allows for in-depth analyses for energy optimization and establishing quantitative proposals for building improvement. This paper shows a comparative study of three programs used for energy simulation of buildings: TRNSYS, HULC and SG SAVE. They have been applied to four Research and Development (R&D) Projects: the energy assessment of a hospital, the energy behaviour of two partially recycled construction materials, and the cost-effectiveness study of energy efficiency measures and renewable energy at the district level, to validate their handling, precision, and result reliability. The comparative assessment shows SG SAVE is the best-valued software: it is free and easy to use, complies with the Spanish energy regulations more easily than HULC, and along with Open Studio makes complex calculations similar to TRNSYS.

2023-07-01T00:00:00Z