Liquid surface tension, kinematic viscosity, density and refractive index of the binary mixtures of n-hexadecane with methyl butyrate and methyl decanoate close to saturation conditions

Zhao, Guanjia; Liu, Xiaona; Yin, Jianguo; Ma, Suxia

doi:10.1016/j.fluid.2019.112448

Cited by 9 publications

(2 citation statements)

References 30 publications

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“…In addition, a systematic variation of mixture components to evaluate the impact of carbon-chain length, branching, or hydroxylation is required so that the scientific findings can be directly transferred to other fluid mixtures. While experimental data for hydrocarbon-based binary mixtures are available in the literature, the investigated temperatures are often limited to 400 K and no such systematic variations are available. − …”

Section: Introductionmentioning

confidence: 99%

Viscosity, Interfacial Tension, and Density of Binary-Liquid Mixtures of n-Hexadecane with n-Octacosane, 2,2,4,4,6,8,8-Heptamethylnonane, or 1-Hexadecanol at Temperatures between 298.15 and 573.15 K by Surface Light Scattering and Equilibrium Molecular Dynamics Simulations

et al. 2021

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This work contributes to the characterization of three binary liquid hydrocarbon-based mixtures via the determination of density, viscosity, and interfacial tension over the entire concentration range up to temperatures of 573.15 K. The oscillating-tube method, surface light scattering (SLS), and equilibrium molecular dynamics (EMD) simulations are applied to analyze the influences of chain length, branching, and hydroxylation on the aforementioned thermophysical properties. For probing these effects, the three binary systems of n-hexadecane (1) with n-octacosane (2), 1-hexadecanol (2), or 2,2,4,4,6,8,8-heptamethylnonane (2), each with mole fraction of x 1 = 0.25, 0.5, or 0.75, are investigated in macroscopic thermodynamic equilibrium at or close to saturation conditions at temperatures between 298.15 and 573.15 K. Based on the experimental results for the liquid densities, liquid viscosities, and interfacial tensions with average expanded uncertainties (k = 2) of 0.10, 2.0, and 1.8%, respectively, our previously published modification to the optimized potentials for the liquid simulations (OPLS) force field for long hydrocarbons (L-OPLS) is evaluated for its transferability to liquid mixtures in EMD simulations. Considering all simulation results, the average absolute relative deviations for the density, viscosity, and interfacial tension are 0.74, 27, and 14%, respectively. Experimental results are also applied for the evaluation of simple prediction models based on pure-component properties. Especially at high temperatures, such simple mixing rules perform well. At lower temperatures, however, nonidealities like surface enrichment or the formation of molecule clusters in the mixture are more likely to dominate fluid behavior, leading to a failure of the simple mixing rules. To explain this observation, partial-density profiles and radial distribution functions from simulations, giving access to the fluid structure on a microscopic level, are evaluated.

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Section: Introductionmentioning

confidence: 99%

Viscosity, Interfacial Tension, and Density of Binary-Liquid Mixtures of n-Hexadecane with n-Octacosane, 2,2,4,4,6,8,8-Heptamethylnonane, or 1-Hexadecanol at Temperatures between 298.15 and 573.15 K by Surface Light Scattering and Equilibrium Molecular Dynamics Simulations

et al. 2021

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“…Many researchers have reported the viscosities of biodiesels/diesel mixtures at atmospheric pressure. − In addition, n -hexadecane is usually considered as the reference substance to model the property of diesel; the reason is that the cetane number of n -hexadecane is similar to diesel. Therefore, several researchers also carried out the investigation of the viscosity of n -hexadecane/biodiesel (or its pure components) mixtures at ambient pressure. − However, in the engine, the injection pressure of the fuel is usually about 15–50 MPa and the temperature is about 300–350 K. In this regard, investigation of the high-pressure viscosity of biodiesels/diesel mixtures is essential. Ethyl octanoate is a kind of medium-chain fatty acid ethyl esters.…”

Section: Introductionmentioning

confidence: 99%

High-Pressure Liquid Viscosity of n-Hexadecane/ethyl Octanoate Mixtures

2021

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The liquid viscosity of n-hexadecane/ethyl octanoate mixtures was measured at the mole fraction of 0.25, 0.5, and 0.75. The measurements were performed at the temperatures from 298 to 361 K and pressures up to 30 MPa. A self-established viscosity system based on the falling cylinder method was used for the present measurements. After careful evaluation, for the present measurements, the combined expanded relative uncertainty of the viscosity was less than 0.04 with a 0.95 confidence. The viscosity values at each mole fraction were correlated by Andrade–Tait equation, and this equation can successfully describe the experimental data within their estimated uncertainties.

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Liquid viscosity, interfacial tension, thermal diffusivity and mutual diffusivity of n-Tetradecane with dissolved carbon dioxide

Cui

2021

Fluid Phase Equilibria

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Liquid surface tension, kinematic viscosity, density and refractive index of the binary mixtures of n-hexadecane with methyl butyrate and methyl decanoate close to saturation conditions

Cited by 9 publications

References 30 publications

Viscosity, Interfacial Tension, and Density of Binary-Liquid Mixtures of n-Hexadecane with n-Octacosane, 2,2,4,4,6,8,8-Heptamethylnonane, or 1-Hexadecanol at Temperatures between 298.15 and 573.15 K by Surface Light Scattering and Equilibrium Molecular Dynamics Simulations

Viscosity, Interfacial Tension, and Density of Binary-Liquid Mixtures of n-Hexadecane with n-Octacosane, 2,2,4,4,6,8,8-Heptamethylnonane, or 1-Hexadecanol at Temperatures between 298.15 and 573.15 K by Surface Light Scattering and Equilibrium Molecular Dynamics Simulations

High-Pressure Liquid Viscosity of n-Hexadecane/ethyl Octanoate Mixtures

Liquid viscosity, interfacial tension, thermal diffusivity and mutual diffusivity of n-Tetradecane with dissolved carbon dioxide

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