Phase equilibrium and metastability of liquid benzene at high pressures

Azreg‐Aïnou, Mustapha; Hüseynov, A.; İbrahimoğlu, Beycan

doi:10.1063/1.2198808

Cited by 19 publications

(6 citation statements)

References 30 publications

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“…Very good agreement is shown between the calculations and the literature data of Azreg-Aïnou et al, Nagaoka and Makita, Yokoyama et al, Sun et al, Osugi et al, Makita and Takagi, Figuière et al, Deffet, Pruzan, and Ghelfenstein (see Figure ). For all these data, the AAD is <0.15%.…”

Section: Comparison Of the New Equation With Experimental Datasupporting

confidence: 82%

“…(red solid line): eq ; (black open squares): Akella and Kennedy; (red open squares): Bridgman; (black open circles): Block; (black solid diamonds): Azreg-Aïnou et al. ; (black cross symbols): Nagaoka and Makita; (black plus symbols): Yokoyama; (black open triangles): Sun et al; (black solid triangles): Tammann; (black solid circles): Osugi et al; (red solid circles): Makita and Takagi; (red solid triangles): Figuière et al; (black solid squares): Trappeniers; (red solid squares): Deffet; (red cross symbols): Pruzan; (red plus symbols): Ghelfenstein; (dashed lines): validity limit of the model developed by Thol et al Melting temperatures have been calculated coupling eq and the model developed by Thol et al…”

Section: Comparison Of the New Equation With Experimental Datamentioning

confidence: 99%

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Gibbs Free Energy Equation of State for Phase I of Solid Benzene from 15 to 488 K and up to 1165 MPa

2021

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The functional form developed in Stringari Stringari J. Chem. Eng. Data20216611571171 has been applied for obtaining a Gibbs free energy equation of state (EoS) for phase I of solid benzene. The EoS has a validity range from 15 K up to the temperature and pressure of the solid II–solid I–liquid triple point, that is, 488.3 K and 1164.6 MPa. The EoS parameters have been regressed on literature data of molar volume, isothermal compressibility, thermal expansion, and isobaric and isochoric heat capacities. The average absolute deviation between the EoS and the primary data is 6.8% for isothermal compressibility, 5.5% for isobaric thermal expansion, 0.9% for molar volume, 2.7% for isobaric heat capacity, and 4.9% for isochoric heat capacity. The EoS maintains a physically correct behavior in the whole range of temperature and pressure of existence of phase I of solid benzene. The developed EoS for solid benzene has been coupled with the reference equation of state for the fluid phases developed by Thol Thol High Temp.-High Press2012418197 for calculating the melting and sublimation curves. Predictions of sublimation pressures are in excellent agreement with the recommended values of Ružička Ružička J. Chem. Thermodynamics2014684047 and those of melting temperatures matches very well the values obtained from the auxiliary melting equation in the validity limits of the EoS of Thol Thol High Temp.-High Press2012418197.

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Section: Comparison Of the New Equation With Experimental Datasupporting

confidence: 82%

Section: Comparison Of the New Equation With Experimental Datamentioning

confidence: 99%

Gibbs Free Energy Equation of State for Phase I of Solid Benzene from 15 to 488 K and up to 1165 MPa

2021

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“…The majority of the melting point data are represented within 5%, with only a few exceptions located mostly near the triple point. In this region, the measurements have relatively large uncertainties [e.g., for Azreg-Aïnou et al, 125,126 ur(p melt , 284.6 K) = 5.8% and ur(p melt , 306.7 K) = 1.2%]. At a given temperature, the reported pressures from various sources differ systematically by up to 10%, particularly those measured around 300 K. However, it is unclear which dataset is more accurate and thus all were retained in this work.…”

Section: Data On the Melting Curvementioning

confidence: 99%

Equation of State for Solid Benzene Valid for Temperatures up to 470 K and Pressures up to 1800 MPa

Xiao

Trusler

Yang

et al. 2021

Journal of Physical and Chemical Reference Data

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The thermodynamic property data for solid phase I of benzene are reviewed and utilized to develop a new fundamental equation of state (EOS) based on Helmholtz energy, following the methodology used for solid phase I of CO 2 by Trusler [J. Phys. Chem. Ref. Data 40, 043105 (2011)]. With temperature and molar volume as independent variables, the EOS is able to calculate all thermodynamic properties of solid benzene at temperatures up to 470 K and at pressures up to 1800 MPa. The model is constructed using the quasi-harmonic approximation, incorporating a Debye oscillator distribution for the vibrons, four discrete modes for the librons, and a further 30 distinct modes for the internal vibrations of the benzene molecule. An anharmonic term is used to account for inevitable deviations from the quasi-harmonic model, which are particularly important near the triple point. The new EOS is able to describe the available experimental data to a level comparable with the likely experimental uncertainties. The estimated relative standard uncertainties of the EOS are 0.2% and 1.5% for molar volume on the sublimation curve and in the compressed solid region, respectively; 8%-1% for isobaric heat capacity on the sublimation curve between 4 K and 278 K; 4% for thermal expansivity; 1% for isentropic bulk modulus; 1% for enthalpy of sublimation and melting; and 3% and 4% for the computed sublimation and melting pressures, respectively. The EOS behaves in a physically reasonable manner at temperatures approaching absolute zero and also at very high pressures.

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“…An experiment setup was designed and established in order to experiment the critical phenomenon that is reportedly non-existent 13 . That fundamental point on the freezing curve has been determined both experimentally and with thermodynamic geometry over discontinuous metastable state of benzene [14][15][16][17] .…”

Section: Benzene Liquid-solid Equilibrium Curvementioning

confidence: 99%

“…Isotherms intersect at p = 2150 atm pressure, ρ = 1155 kg/m 3 density when (p-ρ), T = constant relation applied for the liquid benzene as provided in Fig. 4 below 9,[12][13][14][15][16][17]21,22 .…”

Section: Application Of Thermodynamic Geometry To the Liquid Phase Of...mentioning

confidence: 99%

Critical Parameters of Pure Substances

İbrahimoğlu

Sarıkaya

Ibrahim

2022

Preprint

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Solid, liquid, gas and plasma phases of pure substances were being studied in detail for over a century. There are liquid-solid, liquid-vapor and solid-vapor thermodynamic equilibrium curves on the conventional p-T phase diagram. However, location of the plasma phase, liquid-solid, solid-vapor equilibrium curves and critical parameters limiting those equilibriums are not provided since they haven’t yet been measured experimentally. Determination of the absent equilibrium curves, critical parameters, and the thermodynamic conditions for plasma phase occurrence with its location on the phase diagram were set to be the purpose of this study.

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Phase equilibrium and metastability of liquid benzene at high pressures

Cited by 19 publications

References 30 publications

Gibbs Free Energy Equation of State for Phase I of Solid Benzene from 15 to 488 K and up to 1165 MPa

Gibbs Free Energy Equation of State for Phase I of Solid Benzene from 15 to 488 K and up to 1165 MPa

Equation of State for Solid Benzene Valid for Temperatures up to 470 K and Pressures up to 1800 MPa

Critical Parameters of Pure Substances

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