Measurements and modelling of the viscosity of (methane + ethane) mixtures at temperatures from (253.15 to 473.15) K with pressures up to 2 MPa

Humberg, Kai; Richter, Markus; Trusler, J. P. Martin

doi:10.1016/j.jct.2020.106104

Cited by 11 publications

(29 citation statements)

References 53 publications

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“…The center, right panel shows a clear temperature-dependent trend. At a temperature of approximately 300 K, deviations with respect to the data of Diller et al [78] are higher than with respect to the data of Humberg et al [79], but they are equally distributed around the zero line. Deviations increase with decreasing temperature and exhibit an s-shaped trend in the deviation plot.…”

Section: Methane + Ethanementioning

confidence: 52%

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Dynamic Viscosity of Binary Fluid Mixtures: A Review Focusing on Asymmetric Mixtures

Thol

Richter

2021

Int J Thermophys

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A literature review on experimental data for binary mixtures of methane and carbon dioxide with hydrocarbons up to n-hexadecane is presented. Based on these data, the extended corresponding states method, two entropy scaling approaches, and the friction theory are analyzed with respect to their capability of calculating viscosity values with increasing asymmetry of the binary mixture. It is shown that not only the viscosity model but also the underlying thermodynamic equation of state has a significant influence on the result of such calculations. Shortcomings are identified both in the experimental data and in the modeling approaches.

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Section: Methane + Ethanementioning

confidence: 52%

“…This confirms the first assumption. However, in the lower pressure region, there are only pressure-dependent data of Humberg et al [79] available, whereas the higher pressure region was only investigated by Diller et al [78]. Therefore, it is difficult to assess if this effect is a problem related to the data or the model.…”

Section: Methane + Ethanementioning

confidence: 99%

Dynamic Viscosity of Binary Fluid Mixtures: A Review Focusing on Asymmetric Mixtures

Thol

Richter

2021

Int J Thermophys

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“…[1,2]. The relative expanded combined uncertainty (k = 2) in viscosity (including uncertainties of temperature and pressure) for all pure gases and the gaseous mixtures under discussion amounted to from 0.14 % to 0.49 %, depending on temperature, with the lower values corresponding to 298.15 K [3,1,2]. These values of the uncertainties indicate the measurements as very accurate ones.…”

Section: Results Of the Viscosity Measurements At Ruhr University Bochummentioning

confidence: 84%

Determination of the binary diffusion coefficients and interaction viscosities of the systems carbon dioxide-nitrogen and ethane-methane in the dilute gas phase from accurate experimental viscosity data using the kinetic theory of gases

Vogel

Bich

Hellmann

2023

Preprint

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The results of viscosity measurements at moderate densities on the two gaseous mixtures carbon dioxide-nitrogen and ethane-methane including the pure gases between 253.15 K and 473.15 K, originally performed by Humberg et al. at Ruhr University Bo\-chum, Germany, using a rotating-cylinder viscometer between 0.1 MPa and 2.0 MPa, were employed to determine the interaction viscosity, eta12(0), and the product of molar density and diffusion coefficient, (rho D12)(0), each in the limit of zero density. The isothermal viscosity data were evaluated by those authors with density series restricted to the second order at most to derive the zero-density viscosities and initial density viscosity coefficients, etamix(0) and etamix(1), for the mixtures, as well as, etai(0) and etai(1) (i=1,2), respectively, for the pure gases. Humberg et al. have already compared their etamix(0) and etai(0) data for carbon dioxide-nitrogen and ethane-methane with corresponding viscosity values theoretically computed for the nonspherical potentials of the intermolecular interaction. Now we employed etamix(0) and etamix(1) as well as etai(0) and etai(1) in two procedures to derive eta12(0) values. For this, we needed A12* values (ratio between effective cross-sections of viscosity and diffusion). But the second procedure applying the initial density viscosity coefficients etamix(1) and etai(1) failed to yield reasonable eta12(0) values. The first procedure should provide the best results when it is possible to use A12* values computed for the nonspherical potential. The effect is comparatively small if eta12(0) is determined. But if (rho D12)(0) is calculated from eta12(0) using A12* values for the nonspherical potential, the impact is several percent. Moreover, the experimentally based eta12(0) and (rho D12)(0) data agree with theoretically calculated values for the nonspherical potentials.

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“…Hendl and Vogel [11,72,73] developed a variant of this theory, in which they proposed to apply the zero-density viscosity values of the pure components and of one mixture at a particular mole fraction to correlate the mixture viscosities at other mole fractions and different moderate densities. This methodology was extended by Humberg et al [74,75] to describe their viscosity measurements at temperatures from (253 to 473) K up to 2 MPa on the gaseous mixtures nitrogen−carbon dioxide and methane−ethane.…”

Section: Values For the Interaction Viscosity And For The Product Of ...mentioning

confidence: 99%

Viscosity for Eight Gaseous and Vapor Mixtures: Revisited from Experiment Between 297 K and 638 K. Final and Preliminary Values for the Interaction Viscosity and for the Product of Molar Density and Diffusion Coefficient in the Limit of Zero Density

Vogel

2023

Int J Thermophys

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Measurements and modelling of the viscosity of (methane + ethane) mixtures at temperatures from (253.15 to 473.15) K with pressures up to 2 MPa

Cited by 11 publications

References 53 publications

Dynamic Viscosity of Binary Fluid Mixtures: A Review Focusing on Asymmetric Mixtures

Dynamic Viscosity of Binary Fluid Mixtures: A Review Focusing on Asymmetric Mixtures

Determination of the binary diffusion coefficients and interaction viscosities of the systems carbon dioxide-nitrogen and ethane-methane in the dilute gas phase from accurate experimental viscosity data using the kinetic theory of gases

Viscosity for Eight Gaseous and Vapor Mixtures: Revisited from Experiment Between 297 K and 638 K. Final and Preliminary Values for the Interaction Viscosity and for the Product of Molar Density and Diffusion Coefficient in the Limit of Zero Density

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