Capillary constant and surface tension of methane/hydrogen mixtures

Байдаков, В. Г.; Kaverin, A. M.; Grishina, K.A.

doi:10.1016/j.fuel.2017.03.043

Cited by 9 publications

(2 citation statements)

References 17 publications

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“…(A) Methane, (B) cyclohexane, (C) water, and (D) water + carbon dioxide mixtures. Comparison of PC-SAFT (solid lines) and SAFT-VR-Mie (dashed lines) to experimental data − (symbols).…”

Section: Resultsmentioning

confidence: 99%

Assessing Thermodynamics Models for Phase Equilibria and Interfacial Properties Relevant to the Hydrogenation of Carbon Dioxide

Cea-Klapp,

González-Barramuño,

Gajardo-Parra

et al. 2024

Ind. Eng. Chem. Res.

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The catalytic hydrogenation of carbon dioxide has become a novel technology of economic and environmental interest that allows the production of value-added products as energy alternatives to the current demand. As product distributions are highly dependent on process conditions such as reaction temperature, pressure, and H 2 /CO 2 ratio, it is necessary to have reliable thermodynamic models that can characterize mixtures of reactants with products over a wide range of conditions. In this contribution, the accuracy of two hydrogen models applied through equations of state (EOS) framed within variations of the statistical associating fluid theory (SAFT) is compared. These models include perturbed-chain SAFT (PC-SAFT) EOS and SAFT of variable range and Mie potential (SAFT-VR Mie) EOS. This is accomplished by the depiction of the thermodynamic behavior of mixtures of hydrogen in the context of the hydrogenation of carbon dioxide, estimating the thermodynamic behavior of the relevant mixtures. In all of the cases, zero values for the binary adjustable parameters have been implemented, and both models of hydrogen were fitted from a hydrogen+decane mixture. Available experimental data of high-pressure phase equilibria, critical loci, and interfacial tensions is used to determine the accuracy of the hydrogen models by contrasting their respective predictive capabilities, determining that the overall performance of the one applied in the SAFT-VR Mie EOS is inferior compared to the PC-SAFT one. The average absolute deviations between model calculations and experimental data for vapor−liquid equilibrium are 35.8 % (pressure), 3.10 % (liquid composition), and 2.60 % (vapor composition) for PC-SAFT, and 26.3, 3.27, and 2.65% for SAFT-VR Mie, respectively.

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“…(A) Methane, (B) cyclohexane, (C) water, and (D) water + carbon dioxide mixtures. Comparison of PC-SAFT (solid lines) and SAFT-VR-Mie (dashed lines) to experimental data − (symbols).…”

Section: Resultsmentioning

confidence: 99%

Assessing Thermodynamics Models for Phase Equilibria and Interfacial Properties Relevant to the Hydrogenation of Carbon Dioxide

Cea-Klapp,

González-Barramuño,

Gajardo-Parra

et al. 2024

Ind. Eng. Chem. Res.

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“…We have measured the capillary constant and calculated the surface tension of methane-helium (Baidakov and Grishina, 2013), ethane-helium (Baidakov and Sulla, 1995), and propane-helium, and also methane-hydrogen (Baidakov et al, 2017a) and ethane-hydrogen (Baidakov et al, 2017b) solutions. For methane-helium system, new values of surface tension were calculated with the use of recalculated density data.…”

Section: Resultsmentioning

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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