Experimental Determination of Isobaric Vapor–Liquid Equilibrium and Isothermal Interfacial Tensions for the Binary Ethanol + Cyclopentyl Methyl Ether Mixture

Abstract

This work describes the vapor–liquid equilibrium (VLE) data experimentally measured at three isobaric conditions 50, 75, and 94 kPa and over the temperature range from 334 to 375 K and the atmospheric interfacial tensions (IFT) measured at the isothermal of 298.15 K in the whole mole fraction range for the ethanol + cyclopentyl methyl ether binary system. In order to carry out the experimental determinations, a dynamic all-glass Guillespie type cell was used to carry out VLE measurements, whereas a maximum differential bubble pressure tensiometer was used to IFT determinations. Because few experimental data are available for cyclopentyl methyl ether, vapor pressures and interfacial tensions have also been measured over the temperature range 341–378 K and 298–353 K, respectively. According to the experimental results, the binary system ethanol + cyclopentyl methyl ether displays a positive deviation from the Raoult’s law with a minimum temperature azeotropic over the whole explored pressure range. The azeotropic mole fraction increases in ethanol as pressure and/or temperature increases. For the case of interfacial tensions, they display positive deviation from the linear behavior. The measured VLE data of the ethanol + cyclopentyl methyl ether mixture are thermodynamically consistent as stated by the Fredenlund’s test. Additionally, the VLE were well-correlated by classical activity coefficients models (e.g., Wohl, NRTL, Wilson, and UNIQUAC) for all of the measured isobar conditions. The measured interfacial tensions of the mixture were satisfactorily correlated by the Myers–Scott equation.

Vapor–Liquid Equilibrium, Surface Tension, and Dynamic Viscosity for the Propan-1-ol + Dibutyl Ether Binary Mixture

“…This equipment uses two probes of different orifice radii to create a continuum rate of N 2 bubbles in a liquid mixture of known composition. The measured differential pressure and the probes orifice radii are used in the Laplace equation to calculate the ST (See refs , for details). For the experimental determinations, the temperature was controlled by an external thermostatic bath within ±0.01 K and the reported STs were measured within ±0.05 mN m –1 .…”

“…As a part of our ongoing research project which is focused on the thermophysical determination and theoretical modeling of alternative ethers for fuel additives, − this work focused on the propan-1-ol + DBE binary mixture, which is a renewable biofuel mixture with potential applications in light engines such as helicopters and motorcycle engines.…”

Vapor–Liquid Equilibrium and Interfacial Tension for the 1-Butanol + Cyclopentyl Methyl Ether Binary Mixture

“…The combined expanded uncertainties (considering a 0.95 level of confidence, k = 2) are Ur (ρ) = 1.75 × 10 –4 g cm –3 and Ur (σ) = 0.1 mN m –1 . b The reference data are taken from: Cárdenas et al c Cartes et al d NIST–TDE database e Mejía and Cartes f Mejía et al g Chaparro et al h Randova′ et al i Watanabe et al …”

“…Other innovative examples are the catalytic biomass-to-liquid process to produce 2,5-DMF and recently the possible use of cyclopentyl methyl ether (CPME). , This renewable additive exhibits low volatility and toxicity, moderate hydrophobicity, and high compatibility to other additives for fossil fuel, , among other important properties suitable to relate applications, synthesis, and productions of chemicals. , Unfortunately, this ether has been less explored than the others already tested for the reformulation of fuels. In fact, the explored mixtures are limited to four binary mixtures: CPME + methanol, CPME + ethanol, CPME + hexane, CPME + cyclopentanol, and recently the ternary mixture of hexane + ethanol + CPME …”

Phasepy: A Python based framework for fluid phase equilibria and interfacial properties computation

“…As an extension of the mixture of n ‐hexane and ethanol, the ternary mixture of n ‐hexane, ethanol and CPME has been measured and theoretically modeled using PRSV + MHV + NRTL coupled to SGT. The approach to model this mixture is based on binary experimental phase equilibria and interfacial tensions 78–80 and allows to predict the ternary mixture behavior. In Listing 21 the ternary mixture is created, then the phase equilibria is computed at x 1 = 0.906, x 2 = 0.071 at 298.15 K.…”