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Yokozeki, A.

doi:10.1023/a:1024015729095

Cited by 75 publications

(40 citation statements)

References 31 publications

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“…Experimentally we did not detect any presence of solid at the lowest studied pressure. SLV-EoS [15,16] for the simultaneous representation of solid, liquid, and vapour phases will be compared to the other models for the representation of experimental data. This equation will be used for the prediction of phase diagrams especially in the solid-fluid equilibrium region (separation of H 2 S from natural gas by solidification process).…”

Section: Resultsmentioning

confidence: 99%

Phase equilibrium data for the hydrogen sulphide + methane system at temperatures from 186 to 313 K and pressures up to about 14 MPa

Coquelet

Valtz

Stringari

et al. 2014

Fluid Phase Equilibria

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Section: Resultsmentioning

confidence: 99%

Phase equilibrium data for the hydrogen sulphide + methane system at temperatures from 186 to 313 K and pressures up to about 14 MPa

Coquelet

Valtz

Stringari

et al. 2014

Fluid Phase Equilibria

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“…In this section, we first summarize our unified solid-liquid-vapor EOS [17] for pure compounds, and then describe the mixture EOS, followed by the clathrate-state model within the present EOS method.…”

Section: Thermodynamic Modelmentioning

confidence: 99%

“…First, the unified solidliquid-vapor EOS [17] is briefly presented for pure water and methane. This is followed by discussion of the mixture EOS and how to model the clathrate state with the present EOS.…”

Section: Introductionmentioning

confidence: 99%

Methane Gas Hydrates Viewed through Unified Solid–Liquid–Vapor Equations of State

Yokozeki

2005

Int J Thermophys

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The phase behavior of methane gas hydrates (clathrates) has been investigated with unified equations of state for solid-liquid-vapor phases. This is a new way to look at the clathrate-containing system, being radically different from the traditional statistical thermodynamic model for clathrates. The present paper includes modifications and refinements of the previously published method with the unified equations of state. The univariant three-phase equilibrium lines containing clathrates have been successfully predicted with the present equation-of-state model for a wide temperature and pressure range. Particularly, the phase behavior in very high-pressure regions has been modeled for the first time by the present work. Although the present results at high pressures are still tentative, they will shed some light on the unsettled problem of high pressure phases as reported in the literature.

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“…3 is not convergent in the integration region, since the function 1/(V − c) 2 is line symmetrical, not point symmetrical, with respect to c. Therefore, Model 2 cannot be applied to the modeling of the fluid-solid transition via the Maxwell equal-area rule, contrary to the claim in Ref. [1]. This problem is found for all even values of m. Only Model 1, although it produces a negative pressure, is capable of modeling the fluid-solid phase transition.…”

mentioning

confidence: 92%

Comments on “Analytic Equation of State for Solid–Liquid–Vapor Phases” (Int. J. Thermophys. 24, 589 (2003))

Lee

Yoo

2011

Int J Thermophys

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Among the thermodynamic models applicable to solid-liquid-vapor phases, Yokozeki's model is considered as the first repulsion-based analytic equation of state (EOS) in which a discontinuity is introduced in the isotherm. However, it was found that the model violates some physical constraints due to the empirically introduced discontinuity. This work focuses on the evaluation of the empirical basis of the model through scaled-particle theory (SPT) and a modification of the model to satisfy the physical constraint.Keywords Equation of state · Fluid-solid transition · Hard-sphere fluids · Insertion probability Yokozeki [1] presented seven empirically known facts that a unified equation of state (EOS) for solid-vapor-liquid phases should satisfy, and two of them form the basis of the proposed model: (1) the developed EOS should avoid a solid-fluid critical transition and (2) a negative-pressure region is allowed to describe the stability of the solid phase and model the solid-fluid transition via the Maxwell equal-area rule. It is not clear in the author's first paper [1] that the latter requirement holds for the case where the attraction does not exist. However, considering the author's subsequent works [2,3], the latter requirement is expected to hold for the fluids without attractive forces. To satisfy these requirements, Yokozeki considered that "the solid-phase branch in an EOS must be analytically discontinuous at solid-fluid transitions" and modified the repulsive part of the Van der Waals EOS to have two volume limits as follows:

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Cited by 75 publications

References 31 publications

Phase equilibrium data for the hydrogen sulphide + methane system at temperatures from 186 to 313 K and pressures up to about 14 MPa

Phase equilibrium data for the hydrogen sulphide + methane system at temperatures from 186 to 313 K and pressures up to about 14 MPa

Methane Gas Hydrates Viewed through Unified Solid–Liquid–Vapor Equations of State

Comments on “Analytic Equation of State for Solid–Liquid–Vapor Phases” (Int. J. Thermophys. 24, 589 (2003))

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