Thermophysical study of binary mixtures of 1-butyl-3-methylimidazolium nitrate ionic liquid + alcohols at different temperatures

2020

J. Chem. Eng. Data

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In the present study, to identify the governing intermolecular interactions in the binary mixtures of methyl isobutyl ketone (MIBK) and 1-alkanols (1-hexanol up to 1-decanol), experimental values of density and viscosity at temperatures (293.15 to 323.15 K) were reported. Excess molar volumes (V m E) and viscosity deviations (Δη) for mentioned binary mixtures were calculated and correlated by the Redlich–Kister polynomial expansions. It was found that increasing the alkyl chain of alcohol boosts the strength of intermolecular forces. Also, to obtain more information about the governing forces in the binary mixtures, values of Hansen solubility parameter distance between two molecules, R a, were calculated, and based on the obtained results, the tendency of alcohol to dissolve in the MIBK media was discussed.

Section: Introductionmentioning

confidence: 75%

Densities and Viscosities of Binary Mixtures Containing Methyl Isobutyl Ketone and (C₆–C₁₀) 1-Alkanol

2020

J. Chem. Eng. Data

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“…The present study continuous our earlier study − and evaluates the mutual diffusion coefficients and separation ratio for the binary systems of aniline and alcohols. This paper is organized in the following steps: first, measuring the viscosities and densities at different temperatures for the above mixtures.…”

Section: Introductionmentioning

confidence: 85%

Experimental Density and Viscosity of Aniline and 1-Alkanol Binary Mixtures

2021

J. Chem. Eng. Data

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In this study, values of the density and viscosity of aniline and normal alkanol (1-pentanol, 1-hexanol, 1-heptanol, 1-octanol, 1-nonanol, and 1-decanol) were measured at 293.15–323.15 K. The governing molecular forces in the mixtures were discussed by two important parameters, namely, the mutual diffusion coefficient D 12 and separation ratio ψ. Values of the separation ratio are negative for all binary fluids and increase with the CH2 groups of alcohols. Findings indicate that increasing the alcohol chain length increases its movement and reduces its interaction with aniline molecules. The perturbed chain statistical associating fluid model was utilized to correlate the mixture densities at different temperatures. The consistency among the experimental and predicted values is reasonable for all binary mixtures.

“…For 1-octanol and 1-nonanol, the mass fraction purities were 99.6% and 99.7%, respectively. In the present study, density and viscosity of pure MCH were measured experimentally, but for pure alcohols were obtained from our previous papers [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23].…”

Section: Methodsmentioning

confidence: 99%

“…ρ is density, and ψ is a measure of concentrationinduced density gradient to the temperature-induced density gradient. The motivation of this work as a continuation of our research program [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] is to evaluate thermal and composition effects on molecular interactions in binary mixtures of alcohols and other functional groups.…”

Section: Introductionmentioning

confidence: 99%

Heat and mass transfer in binary fluids containing alcohols with the Soret effect

2022

Preprint

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In this study, heat and mass transfer in binary systems containing methylcyclohexane and n-alkanol (1-pentanol, 1-hexanol, 1-heptanol, 1-octanol, 1-nonanol, and 1-decanol) at 293.15 K to 323.15 K was investigated considering the mutual diffusion coefficient, thermal diffusion coefficient, Soret effect, and the separation ratio. Soret coefficient \({S_T}\)for methylcyclohexane is positive and indicates that this molecule is enriched in the colder regions of the liquids. Obtained results demonstrate that increasing the alkyl chain length reduces its tendency to move to the warmer regions. This behavior means that molecular forces are reinforced with the alcohol chain length. The new method's advantages over previous methods for calculating the thermal behavior of the mixtures are discussed.