Densities and Dynamic Viscosities of Alicyclic Cyclohexane with Toluene, <i>o</i>-Xylene, and Mesitylene at <i>T</i> = (303.15 to 323.15) K and Atmospheric Pressure

Hossain, Mohammad Shahadat; Akhtar, Shamim; Verpoort, Francis

doi:10.1021/acs.jced.7b01003

Cited by 13 publications

(11 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A Setaflash Series 8 closed cup flash point tester model 82000-0 (Stanhope-Seta) was used to measure flash points in the temperature ramp mode. This instrument conforms to ASTM D3278 and other standards, as given in V m E < 0 tetrahydrofuran 27 1,1-diethoxyethane 28 1-choronaphthalene, 24 cyclohexane 29 heptane, octane, acetophenone 30 1,1-diethoxyethane, 28 1-choronaphthalene, 24 cyclohexane, 29 2,2-dimethoxypropane 28 V m E > 0 hexadecane 31 2,2-dimethoxypropane, 28 diethyl carbonate, 32 dimethyl carbonate, 32 cyclohexanone, 23 propyl acetate, 33 butylacetate, 33 cyclopentane, 26 cyclohexane, 26 methylcyclohexane, 26 cyclooctane, 26 octane at T < 318 K, 34 ethylene glycol monoethyl ether 35 acetone and cyclohexanone 30 1-choronaphthalene, 24 cyclohexane, 29 ethylene glycol monoethyl ether, 35 dimethyl carbonate, 32 diethyl carbonate 32 ΔVisc < 0 hexadecane 31 1-choronaphthalene, 24 hexane, 36 cyclohexanone 23 ΔVisc > 0 tetrahydrofuran 27 dodecane, tetradecane, hexadecane 36 a V m E is the excess molar volume, eq 1 Table 2. ΔVisc is the viscosity deviation.…”

Section: Methodsmentioning

confidence: 76%

See 1 more Smart Citation

Binary Mixtures of Aromatic Compounds (n-Propylbenzene, 1,3,5-Trimethylbenzene, and 1,2,4-Trimethylbenzene) with 2,2,4,6,6-Pentamethylheptane: Densities, Viscosities, Speeds of Sound, Bulk Moduli, Surface Tensions, and Flash Points at 0.1 MPa

2020

View full text Add to dashboard Cite

This study presents measured densities, viscosities, speeds of sound, surface tensions, and flash points and calculated bulk moduli of mixtures of 2,2,4,6,6-pentamethylheptane with C9H12 isomers (1,3,5-trimethylbenzene, 1,2,4-trimethylbenzene, and n-propylbenzene). The densities, speeds of sound, bulk moduli, and surface tensions increase and viscosities decrease as the mole fraction of the C9H12 isomer increases. Flash points decreased, remained the same, and increased as the amounts of n-propylbenzene, 1,3,5-trimethylbenzene, and 1,2,4-trimethylbenzene increased, respectively. Ideal behavior was found for viscosity, in which the excess molar Gibbs energies of activation for viscous flow did not differ statistically from zero. Nonideal behavior was found for excess molar volumes, V m E, and excess speeds of sound, c E, which were positive for all mixtures. Molecular dynamics (MD) simulations were used to predict the densities, bulk moduli, surface tensions, and viscosities of these binary mixtures. Although the densities, bulk moduli, and surface tensions were correctly reproduced, the simulations predicted nearly constant viscosities as a function of composition. The MD simulations showed that the molecular-level fluid structure of n-propylbenzene differed from that of 1,3,5-trimethylbenzene and 1,2,4-trimethylbenzene and that the preferential orientation of the aromatic rings of all three molecules was disrupted upon mixing with 2,2,4,6,6-pentamethylheptane. Finally, the mixtures showed an enrichment of 2,2,4,6,6-pentamethylheptane near the liquid–vapor interface. This interfacial enrichment depended on the mixture composition, with high C9H12 mole fractions leading to a larger degree of 2,2,4,6,6-pentamethylheptane enrichment at the interface.

show abstract

Section: Methodsmentioning

confidence: 76%

“…24 l Ref. 29 m Ref. 23 In all the mixtures studied, increasing the mole fraction of the aromatic compound increases the densities, speeds of sound, and surface tensions (Tables 6−8).…”

Section: Methodsmentioning

confidence: 99%

Binary Mixtures of Aromatic Compounds (n-Propylbenzene, 1,3,5-Trimethylbenzene, and 1,2,4-Trimethylbenzene) with 2,2,4,6,6-Pentamethylheptane: Densities, Viscosities, Speeds of Sound, Bulk Moduli, Surface Tensions, and Flash Points at 0.1 MPa

2020

View full text Add to dashboard Cite

show abstract

“…For the solvents employed, molecular weight, dipole moment, ionization potential, dielectric constant, dynamic viscosity, kinematic viscosity, density, and refractive index were tabulated (Table ). − …”

Section: Discussionmentioning

confidence: 99%

Effect of Solvents on Persistent Free Radical Content in the Absence of Reactions

2022

View full text Add to dashboard Cite

The impact of a solvent environment on persistent free radical concentrations at ambient conditions was studied by electron spin resonance spectrometry. The analyte selected was Canadian oil-sand-derived bitumen due to its high persistent free radical content. The ability of 54 different solvents to produce a homogeneous 5 wt % solution of bitumen was evaluated. The influence of solvents on the free radical content in bitumen was determined exclusively for solvents that were capable of quantitatively dissolving the bitumen. These were compounds in the classes of alkynes, mono-and bicyclic benzene-derivatives, and heteroatom-containing compounds containing nitrogen, oxygen, sulfur, and chlorine. It was found that a shift in the g-factor of bitumen occurred when the solvent was changed. The shift was attributed to the radical−solvent interaction that is affected by the polarity of the solvent and reflected in the solvent dipole moment property. The change in the free radical concentration was independent of changes in g-factor and was not correlated with any of the following solvent properties: molecular weight, dipole moment, dielectric constant, refractive index, density, and viscosity. There was a relationship between the free radical concentration in bitumen and the ionization potential of sulfur-containing and diaromatic hydrocarbon solvents. It was concluded that the bulk liquid properties that affected the electronic environment of the free radical species, resulting in a shift in g-factor, were not related to the bulk liquid properties that affected the dissociation equilibrium and resulted in a change in the free radical concentration.

show abstract

“…Similar results were reported in the literature. 14,29,30,32 The effect of adding two methyl groups in the benzene ring (as in xylenes) on the excess molar volume is dependent on their position. While a decrease is observed in the In contrast, m-xylene is the least favorable because the two methyl groups in the meta position of the benzene ring offer maximum steric hindrance that contributes to the expansion in volume.…”

Section: Cyclohexane + Ethylbenzenementioning

confidence: 99%

Densities and Sound Speeds of Binary Mixtures of Cyclohexane + Benzene (or Toluene, or Ethylbenzene or o-, m-, p-Xylene) within the Temperature Range of 293.15–333.15 K and Ambient Pressure: Experimental, Correlation, and Modeling Study

Zeqiraj,

Hernández,

Syla

et al. 2023

J. Chem. Eng. Data

View full text Add to dashboard Cite

This paper is a combined experimental, correlation, and modeling study of binary mixtures of cyclohexane with benzene and some alkyl-substituted benzenes, namely, toluene, ethylbenzene, o-, m-, and p-xylene. Experimental densities and sound speeds are reported at temperatures from 293.15 to 333.15 K and under local atmospheric pressure. Excess molar volumes, derived from experimental densities, excess isentropic compressibilities, derived from experimental densities, and sound speeds, calculated isobaric cubic expansivities, and literature heat capacities were correlated by Redlich−Kister polynomials and discussed. Further, the experimental densities, sound speeds, and related derived properties, namely, isobaric cubic expansivities and isentropic compressibilities, of the mixtures were correlated with the Jouyban−Acree model. The average absolute deviations of the correlated values from the experimental ones were better than 0.02, 0.06, 0.4, and 0.14% for density, sound speed, isobaric cubic expansivity, and isentropic compressibility, respectively. In addition, the results obtained from applying the perturbed chain statistical associating fluid theory equation of state and Schaff's collision factor theory for modeling densities and sound speeds show the versatility of these models for thermodynamic modeling and prediction in systems of varying complexity.

show abstract

Densities and Dynamic Viscosities of Alicyclic Cyclohexane with Toluene, o-Xylene, and Mesitylene at T = (303.15 to 323.15) K and Atmospheric Pressure

Cited by 13 publications

References 55 publications

Binary Mixtures of Aromatic Compounds (n-Propylbenzene, 1,3,5-Trimethylbenzene, and 1,2,4-Trimethylbenzene) with 2,2,4,6,6-Pentamethylheptane: Densities, Viscosities, Speeds of Sound, Bulk Moduli, Surface Tensions, and Flash Points at 0.1 MPa

Binary Mixtures of Aromatic Compounds (n-Propylbenzene, 1,3,5-Trimethylbenzene, and 1,2,4-Trimethylbenzene) with 2,2,4,6,6-Pentamethylheptane: Densities, Viscosities, Speeds of Sound, Bulk Moduli, Surface Tensions, and Flash Points at 0.1 MPa

Effect of Solvents on Persistent Free Radical Content in the Absence of Reactions

Densities and Sound Speeds of Binary Mixtures of Cyclohexane + Benzene (or Toluene, or Ethylbenzene or o-, m-, p-Xylene) within the Temperature Range of 293.15–333.15 K and Ambient Pressure: Experimental, Correlation, and Modeling Study

Contact Info

Product

Resources

About