A new apparatus for the determination of P–x–y diagrams and Henry's constants in high pressure alcohols with critical carbon dioxide

Chang, Chieh-Ming J.; Chiu, Kou-Lung; Day, Chang-Yih

doi:10.1016/s0896-8446(98)00076-x

Cited by 169 publications

(112 citation statements)

References 27 publications

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“…Therefore, this density behavior indicates that ethanol and carbon dioxide are near the critical point. A comparison of the measured carbon dioxide saturated ethanol density at 20.6 C with the density data by Chang [8] at 18C shows a good agreement of the measured values. Due to the dissolution of carbon dioxide in ethanol the density of carbon dioxide saturated ethanol rises at 20.6 C and 57.6 bar to the 1.087-fold, at 62.8 C and 110 bar to the 1.072-fold and at 81.8 C and 84 bar to the 1.019-fold of the pure density of ethanol.…”

Section: Resultssupporting

confidence: 71%

“…Besides that, the change in interfacial tension amounts only to 0.38 mN/m if the density of the carbon dioxide saturated ethanol is used instead of the pure component density. As in literature the data concerning ethanol saturated carbon dioxide differ considerably [7,8] the density of the fluid phase is calculated, using the equation for pure carbon dioxide by Span and Wagner [9]. The use of the pure component density of carbon dioxide instead of the density of ethanol saturated carbon dioxide leads to a maximum error of 0.04 mN/m.…”

Section: Resultsmentioning

confidence: 99%

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Interfacial Tension and Density of Ethanol in Contact with Carbon Dioxide

Dittmar

Oei

Eggers

2002

Chem. Eng. Technol.

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Section: Resultssupporting

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Interfacial Tension and Density of Ethanol in Contact with Carbon Dioxide

Dittmar

Oei

Eggers

2002

Chem. Eng. Technol.

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“…The capabilities of association theories for modeling the important CO 2 + water mixture has been extensively studied in recent literature using Figure 12: Correlation of the CO 2 + nonanol VLE and LLE using CPA n.a., CPA 4C, or qCPA with three or four adjustable parameters. Experimental data from [81,90]. has also been studied, with mixed success, using some of the multipolar SAFTbased equations of state [96][97][98].…”

mentioning

confidence: 99%

Modeling derivative properties and binary mixtures with CO2 using the CPA and the quadrupolar CPA equations of state

Bjørner

Kontogeorgis

2016

Fluid Phase Equilibria

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The cubic plus association (CPA) equation of state (EoS) is extended to include quadrupolar interactions. The quadrupolar term is based on a modification of the perturbation terms by Larsen et al. (Mol. Phys. 1977, 33, 4, 987) for a hard sphere fluid with a symmetric point quadrupole moment. The new quadrupolar CPA (qCPA) can be used without introducing any additional pure compound parameters. Alternatively a single additional adjustable parameter can be employed.To evaluate qCPA several pure compound properties are predicted. The model is furthermore evaluated for its ability to predict and correlate binary vapor-liquid equilibria (VLE) and liquid-liquid equilibria (LLE) of mixtures containing CO 2 and hydrocarbons, water, alcohols, or selected quadrupolar compounds.The results indicate that most pure compound property predictions are satisfactory but similar to other CPA approaches. When binary mixtures are con- qCPA can accurately correlate both the phase behaviour of CO 2 + hydrocarbon mixtures as well as mixtures of CO 2 + a self-associating compound.

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“…The most deviations in bubble pressure are less than 6%. Several higher deviations (> 10%) appear at temperatures near critical pressure maximum of critical curve (P-T projection) or for experimental data which seem to be unreliable [25,26]. Also, the AADP (%) and AADY (%) are higher for literature data measured only in the critical region.…”

Section: Phase Equilibria Experiments and Calculations For Carbon Diomentioning

confidence: 86%

Phase equilibria experiments and calculations for carbon dioxide + methanol binary system

2009

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Abstract:Vapor-liquid equilibria (VLE) data for the carbon dioxide + methanol system was measured at 293.15, 298.15, 310.15, and 323.15 K. Phase behavior measurements were made in a high-pressure visual cell with variable volume, based on the static-analytic method. The pressure range under investigation was between 4.8 and 95.1 bar. The Soave-Redlich-Kwong (SRK)-EOS coupled with Huron-Vidal (HV) mixing rules and a reduced UNIQUAC model, was used in a semi-predictive approach, in order to represent the phase behavior (critical curve, isothermal VLE) of the system. The topology of the phase behavior of the carbon dioxide + methanol system is satisfactory predicted with the SRK/HV-residual UNIQUAC model. © Versita Warsaw and Springer-Verlag Berlin Heidelberg.

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A new apparatus for the determination of P–x–y diagrams and Henry's constants in high pressure alcohols with critical carbon dioxide

Cited by 169 publications

References 27 publications

Interfacial Tension and Density of Ethanol in Contact with Carbon Dioxide

Interfacial Tension and Density of Ethanol in Contact with Carbon Dioxide

Modeling derivative properties and binary mixtures with CO2 using the CPA and the quadrupolar CPA equations of state

Phase equilibria experiments and calculations for carbon dioxide + methanol binary system

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