Measurement of the Mass Transfer into Single Drops in the System of Water/Supercritical Carbon Dioxide

Zappe, Jan; Wesch, Arno; Ebert, Klaus

doi:10.1006/jcis.2000.7117

Cited by 16 publications

(8 citation statements)

References 13 publications

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“…In both parts a and b, the density profiles of CO 2 display a nonmonotonic trend at the interface, indicating that the molecules of CO 2 accumulate in the interface. Actually, for a binary mixture, if the components have two quite 18,33 different molecules, molecules of the component with lowest surface tension have a tendency to accumulate in the interface. Figure 3(a) indicates that when the pressure is high (30 MPa), the reduced number densities of CO 2 in CO 2 -rich phases remarkably decrease with increasing temperature but those in water-rich phases decrease indistinctively.…”

Section: Density Distributions Across the Interfacementioning

confidence: 99%

Investigation of Interfacial Tensions for Carbon Dioxide Aqueous Solutions by Perturbed-Chain Statistical Associating Fluid Theory Combined with Density-Gradient Theory

Liu

2008

Ind. Eng. Chem. Res.

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The perturbed-chain statistical associating fluid theory and density-gradient theory are used to construct an equation of state (EOS) applicable for the phase behaviors of carbon dioxide aqueous solutions. With the molecular parameters and influence parameters respectively regressed from bulk properties and surface tensions of pure fluids as input, both the bulk and interfacial properties of carbon dioxide aqueous solutions are satisfactorily correlated by adjusting the binary interaction parameter (k ij ). Our results show that the constructed EOS is able to describe the interfacial properties of carbon dioxide aqueous solutions in a wide temperature range, and illustrate the influences of temperature, pressure, and densities in each phase on the interfacial properties.

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Section: Density Distributions Across the Interfacementioning

confidence: 99%

Investigation of Interfacial Tensions for Carbon Dioxide Aqueous Solutions by Perturbed-Chain Statistical Associating Fluid Theory Combined with Density-Gradient Theory

Liu

2008

Ind. Eng. Chem. Res.

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“…However, studies into actual mass transfer coefficients have been limited, with only four different systems being investigated, and most studies are on CO 2 +H 2 O under conditions relevant to deep-sea CO 2 sequestration. [132][133][134][135][136][137][138][139][140][141] The mass transfer rates for H 2 and CO into CO 2 -expanded 1-octene have been measured, but unfortunately they were not compared with data obtained under comparable conditions in the absence of CO 2 . 141 The use of GXLs can in principle also lead to an overall reduction in solvent usage; the usually quoted reduction 10,142 being "up to 80%".…”

Section: What Happens On Expansion?mentioning

confidence: 99%

A critical look at reactions in class I and II gas-expanded liquids using CO2 and other gases

2009

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“…In the beginning (A) all the fast processessincluding diffusion, convection due to mixing phenomena and temperature gradients, and eventually chemical reactionsscause a rapid drop in the measured value. 11,12 The extent of the decay in interval A can be reduced by presaturation of both phases. After this, the interfacial tension remains nearly constant (B).…”

Section: Introductionmentioning

confidence: 99%

Interfacial Tension at Elevated PressuresMeasurements and Correlations in the Water + Carbon Dioxide System

et al. 2002

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A novel apparatus, PeDro, for high-pressure measurement of the interfacial tension using the pendant drop method is presented. This apparatus was constructed for accurate measurements in the two-component system of water and compressed carbon dioxide. The main influences on accurate and reproducible results have been investigated, and the results have led to an optimized experimental setup and a quasi-static measuring method. PeDro was calibrated against well-established data for water + air. The experimental error of measurement is smaller than 2%. In this two-phase system measurements were conducted in the ranges (278 to 335) K and (0.1 to 20) MPa. The interfacial tension showed a pronounced dependence on pressure and temperature. A regression function has been found which describes the experimental data in the range investigated with high precision.

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Measurement of the Mass Transfer into Single Drops in the System of Water/Supercritical Carbon Dioxide

Cited by 16 publications

References 13 publications

Investigation of Interfacial Tensions for Carbon Dioxide Aqueous Solutions by Perturbed-Chain Statistical Associating Fluid Theory Combined with Density-Gradient Theory

Investigation of Interfacial Tensions for Carbon Dioxide Aqueous Solutions by Perturbed-Chain Statistical Associating Fluid Theory Combined with Density-Gradient Theory

A critical look at reactions in class I and II gas-expanded liquids using CO2 and other gases

Interfacial Tension at Elevated PressuresMeasurements and Correlations in the Water + Carbon Dioxide System

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