Compressed Liquid Viscosity of 2-Methylpentane, 3-Methylpentane, and 2,3-Dimethylbutane at Temperatures from (273 to 343) K and Pressures up to 40 MPa

Wen, Chenyang; Meng, Xianyang; Wei, Kaixin; Wu, Jiangtao

doi:10.1021/acs.jced.6b01024

Cited by 2 publications

(1 citation statement)

References 25 publications

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“…The first section is a vibrating-tube densimeter , (the expanded uncertainty of density U c (ρ) is 0.6 kg·m –3 ( k = 2)) including an Anton Paar DMA HPM module, data acquisition instruments, and control units. The second section is a vibrating-wire viscometer , (the expanded relative uncertainty of viscosity U c (η)/η is lower than 0.023 ( k = 2)) including a vibrating-wire module, data acquisition instruments, and control units. Detailed information on these two sections could be found in our previous article, and here is a brief description.…”

Section: Methodsmentioning

confidence: 99%

Experimental and Modeling Investigations of Density and Viscosity for the Ternary (N-Octane + Ethylcyclohexane + Ethylbenzene) Mixtures

Li,

Qin,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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Biofuels are increasingly recognized as the most practical way to reduce carbon dioxide emissions and pollution in the transport industry. However, the production and promotion of biofuels have encountered many obstacles due to their complex composition and the ambiguity in studies on the physicochemical properties. To achieve a thorough comprehension of biofuel density and viscosity properties, developing suitable surrogate mixtures is an accurate and efficient method. N-Octane, ethylcyclohexane, and ethylbenzene are important components of biofuel surrogate mixtures to reflect the thermophysical properties of three primary hydrocarbons (alkanes, cycloalkanes, and alkylbenzenes). Therefore, the liquid density and viscosity of ternary mixtures (n-octane + ethylcyclohexane + ethylbenzene) are measured using a vibrating-tube densimeter and vibrating-wire viscometer, respectively, over the temperature range from 283.15 to 363.15 K and at pressures of up to 60 MPa. Moreover, the excess volume and viscosity deviations of the mixtures were obtained. For density, the group contribution (GC) PC-statistical associating fluid theory (PC-SAFT) equation of state (EoS) and SAFT-γ Mie EoS have been compared to assess the effect of different interaction potential functions on the prediction of liquid-phase densities. The results showed that the SAFT-γ Mie EoS gave the best prediction, followed by the GC PC-SAFT EoS. In terms of viscosity, a new mapping law for effective molecular weight has been developed to improve the predictive accuracy of the 1-cEHS model, and the absolute average deviations (AAD%) are 3.3− 5%. In addition, excess molar volumes and viscosity deviations in this work are derived and discussed to further explore the influence of different molecular structures on thermophysical properties.

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Section: Methodsmentioning

confidence: 99%

Experimental and Modeling Investigations of Density and Viscosity for the Ternary (N-Octane + Ethylcyclohexane + Ethylbenzene) Mixtures

Li,

Qin,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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A switched vibrating-hot-wire method for measuring the viscosity and thermal conductivity of liquids

Shi

et al. 2019

Review of Scientific Instruments

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A method involving a vibrating hot wire is proposed for measuring the viscosity and thermal conductivity of liquids. A platinum wire is bent into a semicircular shape and immersed in the sample liquid in the presence of a static magnetic field. Alternating current is then applied to the wire, causing it to vibrate and generate heat. At low frequency, the frequency response of the vibration is used to calculate the viscosity. At high frequency, the vibration amplitude of the wire is less than the molecular free path, and the thermal conductivity of the sample is obtained from the temperature dependence of the resistance. The proposed method is validated using water, toluene, anhydrous ethanol, and ethanediol as the test samples. The measurement uncertainty is estimated to be 1.5% (k = 1) for thermal conductivity and 0.7% (k = 2) for viscosity.

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Compressed Liquid Viscosity of 2-Methylpentane, 3-Methylpentane, and 2,3-Dimethylbutane at Temperatures from (273 to 343) K and Pressures up to 40 MPa

Cited by 2 publications

References 25 publications

Experimental and Modeling Investigations of Density and Viscosity for the Ternary (N-Octane + Ethylcyclohexane + Ethylbenzene) Mixtures

Experimental and Modeling Investigations of Density and Viscosity for the Ternary (N-Octane + Ethylcyclohexane + Ethylbenzene) Mixtures

A switched vibrating-hot-wire method for measuring the viscosity and thermal conductivity of liquids

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