Measurement of Liquid Density of Mixtures of 1-Propanol + 2-(2-Methoxyethoxy)ethanol at Temperatures from 298.15 to 393.15 K and Pressures up to 140 MPa and Modeling Using PC-SAFT and Peng–Robinson Equations of State

The environmental imperative driving the search for alternative fuels has fostered the rise of biofuels from biomass, offering renewable solutions that curtail petroleum dependence and greenhouse gas emissions. Propanol, as a primary biofuel, serves as an oxygenated additive, enhancing combustion efficiency and mitigating air pollutants. Propanol's oxygen-rich composition enhances engine performance and diminishes emissions. Studies on alkoxyethanols-gasoline blends showcase significant reductions in toxic pollutants, underscoring the need for thermodynamic understanding to foster cleaner energy. This study presents high-temperature and high-pressure density data for the binary mixture of 1-propanol, an alcohol, and 2-(2-methoxyethoxy)ethanol, an alkoxyethanol, covering temperatures ranging from 298.15 to 393.15 K and pressures from 0.1 to 140 MPa. The experimental density data were generated using a vibrating tube densitometer with an uncertainty of 0.7 × 10–3 g cm–3. Experimental density data were fitted by using the Tait-like equation, with low standard deviations. Also, the experimental measurements were correlated using PC-SAFT and Peng–Robinson equations of state. The derived properties, such as excess volume, isobaric thermal expansivity, and isothermal compressibility, were also calculated.