Surface tension of an ethane–nitrogen solution. 1: Experiment and thermodynamic analysis of the results

Байдаков, В. Г.; Kaverin, A. M.; Khotienkova, Maria N.; Андбаева, В. Н.

doi:10.1016/j.fluid.2012.05.005

Cited by 28 publications

(8 citation statements)

References 11 publications

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“…Indeed, we do not see a single molecule of ethane in the vapor phase over the time scale of our simulations. Our results for surface tension values are in quantitative agreement with the experimental data − for both nitrogen–methane and nitrogen–ethane systems.…”

Section: Resultssupporting

confidence: 89%

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Solubility of Nitrogen in Methane, Ethane, and Mixtures of Methane and Ethane at Titan-Like Conditions: A Molecular Dynamics Study

Kumar

Chevrier

2020

ACS Earth Space Chem.

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We have studied the temperature dependence of the solubility of nitrogen in methane, ethane, and mixtures of methane and ethane using vapor-liquid equilibrium simulations of binary and ternary mixtures of nitrogen, methane and ethane for a range of temperatures between 90K and 110K at a pressure of 1.5 atm, thermodynamic conditions that may exist on the Saturn's giant moon, Titan. We find that -(i) the solubility of nitrogen in both methane and ethane decreases with increasing temperature; (ii) the solubility of nitrogen in methane is much larger compared to that in ethane at low temperatures, (iii) solubility of nitrogen in a ternary mixture of methane, ethane, and nitrogen increases upon increasing mole-fraction of methane. Our results are in quantitative agreement with the recent experimental measurement of the solubility of nitrogen in methane, ethane, and a mixture of methane and ethane. Furthermore, we find a strong temperature-dependent surface adsorption of nitrogen at the nitrogen-hydrocarbon interface, previously unknown. We have also investigated surface tension of the gas-liquid interface and find that it decreases upon decreasing temperature. Moreover, we find that the interfacial layer of adsorbed nitrogen and ethane show a preferential orientational ordering at the interface.

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Section: Resultssupporting

confidence: 89%

“…Solubility of nitrogen increases as the mole fraction of methane in the mixture increases, while the surface tension decreases upon increasing the mole fraction of methane. Our values of surface tension agree well with the experimental values. − …”

Section: Resultssupporting

confidence: 87%

Solubility of Nitrogen in Methane, Ethane, and Mixtures of Methane and Ethane at Titan-Like Conditions: A Molecular Dynamics Study

Kumar

Chevrier

2020

ACS Earth Space Chem.

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“…ST of systems nitrogen (1)–methane (2), nitrogen (1)–ethane (2), nitrogen (1)– n -pentane (2), and nitrogen (1)– n -hexane (2). Points, experimental data. − Lines, predictions of the proposed approach ( k 12 = 0.05, β = 1).…”

Section: Resultsmentioning

confidence: 99%

Toward Development of a Universal CP-PC-SAFT-Based Modeling Framework for Predicting Thermophysical Properties at Reservoir Conditions: Inclusion of Surface Tensions

Garrido

Polishuk

2018

Ind. Eng. Chem. Res.

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This study presents an approach for predicting surface tensions (ST) of mixtures coupling the critical-point-based perturbedchain statistical association fluid theory (CP-PC-SAFT) and the square gradient theory (SGT). This modeling framework implements standardized and transparent parametrization procedures. As an input it requires the pure compound critical temperatures and pressures along with the triple point densities and surface tensions, without further adjustment to ST data of mixtures. Its predictions of a major part of the existing surface tension data on asymmetric binary systems, including the aqueous solutions, in the entire available range of conditions, are discussed. The results demonstrate that the proposed approach is characterized by a remarkable overall robustness and reliability. However, the system toluene (1)−water (2) poses a clear limitation to its predictive implementation. Predictions of CP-PC-SAFT coupled with the generalized modified Yarranton−Satyro correlation for the recently published data on saturated liquid CO 2 (1)−n-alkane (2) phases are also presented.

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“…To measure surface tension, use was made of the differential variation of the method of capillary rise (Baidakov, 1994;Baidakov et al, 2012) of capillaries with different inner radii were used in the experiments. The capillary radii were determined by calibration with mercury and had the following values: r 1 = (0.2310 ± 0.0003) mm, r 2 = (0.1253 ± 0.0005) mm, r 3 = (0.06508 ± 0.00009) mm (assembly I) and r 1 = (0.6393 ± 0.0005) mm, r 2 = (0.2297 ± 0.0003) mm, r 3 = (0.09607 ± 0.00008) mm (assembly II).…”

Section: Procedures Of Measurementsmentioning

confidence: 99%

Surface Tension of Alkanes Saturated With Helium or Hydrogen

Байдаков

Kaverin

Grishina

et al. 2017

Interfac Phenom Heat Transfer

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The differential capillary method has been used to measure the capillary constant a 2 and to determine the surface tension σ of alkanes (methane, ethane, propane) saturated with helium or hydrogen. Experiments have been made in temperature ranges from the triple-point temperature to temperatures close to the solvent critical point at pressures from that of saturated vapors of a pure liquid to 4 MPa. Equations have been suggested which describe the temperature, baric, and concentration dependences of a 2 and σ of solutions. The data obtained have been used to calculate the relative adsorption. The results of measurements are discussed in the framework of thermodynamic models of the theory of surface phenomena.

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Surface tension of an ethane–nitrogen solution. 1: Experiment and thermodynamic analysis of the results

Cited by 28 publications

References 11 publications

Solubility of Nitrogen in Methane, Ethane, and Mixtures of Methane and Ethane at Titan-Like Conditions: A Molecular Dynamics Study

Solubility of Nitrogen in Methane, Ethane, and Mixtures of Methane and Ethane at Titan-Like Conditions: A Molecular Dynamics Study

Toward Development of a Universal CP-PC-SAFT-Based Modeling Framework for Predicting Thermophysical Properties at Reservoir Conditions: Inclusion of Surface Tensions

Surface Tension of Alkanes Saturated With Helium or Hydrogen

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