A new generalized corresponding-states equation of state for the extension of the Lee–Kesler equation to fluids consisting of polar and larger nonpolar molecules

Xiang, Hong Wei; Deiters, Ulrich K.

doi:10.1016/j.ces.2007.11.029

Cited by 19 publications

(13 citation statements)

References 44 publications

(45 reference statements)

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“…Only the Xiang–Deiters and BNJS-2LJ equations of state are consistent with this constraint. We have selected the Xiang–Deiters EOS for this reason and because it was specifically developed for application to small alkane molecules …”

Section: Experiments and Analysis Methodsmentioning

confidence: 99%

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Observation of Liquid–Liquid Phase Transitions in Ethane at 300 K

et al. 2018

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We have conducted Raman spectroscopy experiments on liquid ethane (C 2 H 6 ) at 300 K, obtaining a large amount of data at very high resolution. This has enabled the observation of Raman peaks expected but not previously observed in liquid ethane and a detailed experimental study of the liquid that was not previously possible. We have observed a transition between rigid and nonrigid liquid states in liquid ethane at ca. 250 MPa corresponding to the recently proposed Frenkel line, a dynamic transition between rigid liquid (liquidlike) and nonrigid liquid (gaslike) states beginning in the subcritical region and extending to arbitrarily high pressure and temperature. The observation of this transition in liquid (subcritical) ethane allows a clear differentiation to be made between the Frenkel line (beginning in the subcritical region at higher density than the boiling line) and the Widom lines (emanating from the critical point and not existing in the subcritical region). Furthermore, we observe a narrow transition at ca. 1000 MPa to a second rigid liquid state. We propose that this corresponds to a state in which orientational order must exist to achieve the expected density and can view the transition in analogy to the transition in the solid state away from the orientationally disordered phase I to the orientationally ordered phases II and III.

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Section: Experiments and Analysis Methodsmentioning

confidence: 99%

“…We have selected the Xiang−Deiters EOS for this reason and because it was specifically developed for application to small alkane molecules. 24…”

Section: ■ Experiments and Analysis Methodsmentioning

confidence: 99%

Observation of Liquid–Liquid Phase Transitions in Ethane at 300 K

et al. 2018

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“…2. Xiang-Deiters (XD) [15] This is a noncubic equation based on a multidimensional corresponding states approach. Here the mixing rules of Plöcker et al [16] were used.…”

Section: Outline Of the Algorithmmentioning

confidence: 99%

An efficient algorithm for the calculation of phase envelopes of fluid mixtures

Quiñones-Cisneros

Deiters

2012

Fluid Phase Equilibria

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“…As a "rule of thumb" concerning the displacement of the Widom-region due to the addition of a small amount of a second component, one might expect that a contaminant with higher critical temperature would shift the Widom-peak to higher temperatures, while one the ThermoC package (Deiters 2006, Xiang andDeiters 2008). The compressibility peaks of methane-CO 2 with various methane contents are shifted to lower temperature compare to that of pure CO 2 , consistent with the fact that methane has lower critical temperature than CO 2 .…”

Section: Impure Carbon Dioxidementioning

confidence: 99%

“…Obviously, the best solutions would be to find reservoirs with caprocks having very low permeabilities (Edlmann et al 2013) or to develop methods where only a small fraction of the fluid would be in the supercritical phase, like the storage of absorbed CO 2 in coal mines (see for example Gonzalez-Nicieza et al 2014). (Xiang and Deiters, 2008).…”

Section: Summary and Perspectivesmentioning

confidence: 99%

Anomalous fluid properties of carbon dioxide in the supercritical region: application to geological CO2 storage and related hazards

Imre

Ramboz

Deiters³

et al. 2014

Environ Earth Sci

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For supercritical fluids there is a wedge-shaped region called Widom region, where several physico-chemical quantities (e.g., compressibility, heat capacities, density, thermal expansivity, speed of sound) show anomalous behaviour. In this paper several Widom lines of supercritical CO 2 have been computed with the Wagner-Span reference equation of state. The locations of the Widom lines are compared with the P-T range of the Snøhvit, Sleipner, Nagaoka and Ketzin reservoirs, which are recently studied for their fitness for CO 2 sequestration, and two natural CO 2 storage analogues, Montmiral in France and Mihályi-Répcelak in Hungary. The potential consequences of leaking CO 2 crossing any of the Widom lines are discussed.

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A new generalized corresponding-states equation of state for the extension of the Lee–Kesler equation to fluids consisting of polar and larger nonpolar molecules

Cited by 19 publications

References 44 publications

Observation of Liquid–Liquid Phase Transitions in Ethane at 300 K

Observation of Liquid–Liquid Phase Transitions in Ethane at 300 K

An efficient algorithm for the calculation of phase envelopes of fluid mixtures

Anomalous fluid properties of carbon dioxide in the supercritical region: application to geological CO2 storage and related hazards

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