Thermodynamic Properties of Aqueous Gas Mixtures at Advanced Pressures

Santis, Roberto De; Breedveld, G. J. F.; Prausnitz, John M.

doi:10.1021/i260052a013

Cited by 92 publications

(34 citation statements)

References 5 publications

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“…The densities of fluid inclusions can be used to put limits on these kinds of selective leakage. For example, calculations using the modified Redlich-Kwong equation of state of de Santis, Breedveld & Prausnitz (1974) and constants given by Holloway (1977) indicate that a mixed H,O-CO, fluid inclusion with 50mol. % H,O trapped at 750°C and 7 kbar would have a molar volume of 32.1 cm3/mol.…”

Section: The Inclusions Contain a C0-rich Fluid Left Behind After Thmentioning

confidence: 99%

Fluid inclusions in rocks from the amphibolite‐facies gneiss to charnockite progression in southern Karnataka, India: direct evidence concerning the fluids of granulite metamorphism

Hansen

Newton

Janardhan

1984

Journal Metamorphic Geology

132

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Abstract. Fluid inclusion studies of rocks from the area suggests progressive decrease of the late Archaean amphibolite-facies to granulitewith increasing grade. Oxygen fugacities calcufacies transition zone of southern India provide lated from orthopyroxene-magnetitequartz are support for the hypothesis that C0,-rich H,Oconsiderably higher than the graphite C0,-0, poor fluids were a major factor in the origin of the buffer, which explains the absence of graphite in high-grade terrain. Charnockites, closely asthe charnockites. sociated leucogranites and quartzo-feldspathicThe present study quantifies the nature of the veins contain vast numbers of large C0,-rich vapours in the southern India granulite metainclusions in planar arrays in quartz and feldspar, morphism. It remains to be determined whether whereas amphibole-bearing gray gneisses of C0 Microthermometry of CO, inclusions shows that miscible CH, and N, must be small, probably less than 10 mol. %combined. Densities of CO, increase steadily from north to south across the transitional terrane. Entrapment pressures calculated from the CO, equation of state range from 5 kbar in the north to 7.5 kbar in the south at the mineralogically inferred average metamorphic temperature of 750"C, in quantitative agreement with mineralogic geobarometry. This agreement leads to the inference that the fluid inclusions were trapped at or near peak metamorphic conditions.Calculations on the stability of the charnockite assemblage biotite-orthopyroxene-K-feldsparquartz show that an associated fluid phase must have less than 0 . 3 5 H 2 0 activity at the inferred P and T conditions, which agrees with the petrographic observations. High TiO, content of biotite stabilizes it to lower H,O activities, and the steady increase of biotite TiO, southward in

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Section: The Inclusions Contain a C0-rich Fluid Left Behind After Thmentioning

confidence: 99%

Fluid inclusions in rocks from the amphibolite‐facies gneiss to charnockite progression in southern Karnataka, India: direct evidence concerning the fluids of granulite metamorphism

Hansen

Newton

Janardhan

1984

Journal Metamorphic Geology

132

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“…The temperature-dependent parameter, a ii 1 , is zero for gaseous oxygen. For water vapor, a ii 1 was taken from de Santis et al [4]. Because the modified RK EOS has not been verified yet for the oxygen-water system, it was investigated in the following text.…”

Section: Thermodynamic Modelmentioning

confidence: 99%

“…Fugacity coefficients of the components in the vapor phase were calculated with the modified Redlich-Kwong (RK) EOS [4]. The dissolved oxygen in the liquid phase followed Henry's law.…”

Section: Introductionmentioning

confidence: 99%

Phase equilibria for the oxygen–water system up to elevated temperatures and pressures

Ji¹,

Lü²,

Yan³

2004

Fluid Phase Equilibria

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A new thermodynamic model was presented to calculate the phase equilibria for t he oxygen-water system. The modified RedlichKwong equation of state with a new correlated cross interaction parameter was used to calculate fugacity coefficients for the vapor phase. The dissolved oxygen followed Henry's law. A new expression was correlated from the experimental data to calculate Henry's constant of oxygen. The calculation results of equilibrium composition were compared with the available experimental data and those calculated by other models with different parameters. The comparison revealed that the new model is suitable for calculating both liquid and vapor compositions while the empirical method is only suitable for estimating the liquid composition. Furthermore, compared to the model proposed by Rebenovich and Beketov, the calculation results of the vapor composition with the new model are better.

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“…In the present deThat is, the deviations between calculated and experimental values for (z-1)v have been minimized. Then, the second and third virial coefficient data12) are adopted to fit more precisely (1) and (6) to (8) according to the thermodynamic standard procedure.…”

Section: Equation Of Statementioning

confidence: 99%

“…De Santis et al 1) have shown that the RedlichKwong equation of state is useful to correlate the solubility of water in compressed n-butane gas by adjusting the constant a reflecting the intermolecular attraction. De Santis and Marrelli2) have adopted a perturbed-hard-sphere equation of state (the repulsion term is given by Carnahan and Starling's expression3) and the attraction term is approximated by that of the Redlich-Kwong equation of state) to correlate the solubility of water in compressed air.…”

Section: Introductionmentioning

confidence: 99%