Solubilities of naphthalene in (CO2 + C2H6) and (CO2 + C3H8) up to 333 K and 17.7 MPa

Smith, G.R.; Wormald, C.J.

doi:10.1016/0378-3812(90)80021-3

Cited by 18 publications

(38 citation statements)

References 21 publications

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“…This is an extension of our previous work on the reliable computation of solid-fluid equilibria 7 to include the presence of cosolvents. Gaseous or liquid cosolvents are frequently used in supercritical fluid extraction processes, and are integral in processes such as the gas anti-solvent process (GAS) to precipitate SFE data 18 Equifugacity roots (stable) …”

Section: Discussionmentioning

confidence: 99%

“…This line represents a constant solvent/cosolvent loading, as one would encounter with a premixed CO 2 /propane mixture, such as that used by Smith and Wormald. 18 The position of the initial overall composition point along that straight line depends on how much solute (naphthalene) is loaded. Figure 3 illustrates the low-pressure condition, P A from Figure 2.…”

Section: Ternary Phase Behaviormentioning

confidence: 99%

“…An alternative expression 18 , used in some cases for consistency in making comparisons to the literature, is…”

Section: Equifugacity Conditionsmentioning

confidence: 99%

“…18 Both systems were measured at temperatures from 35 °C to 60 °C, and at pressures from 60 to 250 bar. They also determined the SLV equilibrium (first melting line) for these systems, and modeled the data using the Peng-Robinson EOS with van der Waals mixing rules.…”

Section: _ Example 1: Naphthalene and Co 2 With Gaseous Cosolvents Etmentioning

confidence: 99%

“…Figure 7 shows the computed results for CO 2 /C 2 H 6 at T = 307.9 K, along with the data of Smith and Wormald 18 . As shown, at each pressure there is a single solubility root to the equifugacity condition, which was confirmed to be stable using the interval method.…”

Section: _ Example 1: Naphthalene and Co 2 With Gaseous Cosolvents Etmentioning

confidence: 99%

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Phase Behavior and Reliable Computation of High-Pressure Solid−Fluid Equilibrium with Cosolvents

Scurto

Brennecke

et al. 2003

Ind. Eng. Chem. Res.

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The identification of the correct, stable solution to a phase equilibrium problem, given a particular thermodynamic model, is essential for the design of separation processes.It is also important in the selection of an appropriate model to represent experimental data.The need for a completely reliable method to test for phase stability is particularly pressing when the number of phases likely to be present is not intuitive to the user, as is frequently the case with high-pressure systems. Previously, we have a presented a completely reliable computational technique, based on interval analysis, to correctly identify phase equilibrium and test for phase stability in binary solvent-solute systems, that include the possibility of a solid phase, using any of a variety of cubic equations of state as the thermodynamic model.Here we extend the methodology to include multicomponent solvent-solute-cosolvent systems where the likelihood of additional phase formation is even greater than in the binary case. Gaseous or liquid cosolvents are frequently used in supercritical fluid extraction processes, and are integral in processes such as the gas anti-solvent process (GAS) to precipitate uniform solid particles. Using several examples from the literature, we demonstrate how the new computational technique can be used to identify experimental data that may have been misinterpreted and to identify models that do not predict what the modeler intended.

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Section: Discussionmentioning

confidence: 99%

Section: Ternary Phase Behaviormentioning

confidence: 99%

“…An alternative expression 18 , used in some cases for consistency in making comparisons to the literature, is…”

Section: Equifugacity Conditionsmentioning

confidence: 99%

Section: _ Example 1: Naphthalene and Co 2 With Gaseous Cosolvents Etmentioning

confidence: 99%

Section: _ Example 1: Naphthalene and Co 2 With Gaseous Cosolvents Etmentioning

confidence: 99%

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Phase Behavior and Reliable Computation of High-Pressure Solid−Fluid Equilibrium with Cosolvents

Scurto

Brennecke

et al. 2003

Ind. Eng. Chem. Res.

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Solubility of Solids and Liquids in Supercritical Fluids

Aim¹,

Fermeglia²

2003

The Experimental Determination of Solubilities

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Cosolvent interactions in supercritical fluid solutions

et al. 1993

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The addition of cosolvents to supercritical fluid (SCF) solvents can have large effects on solubilities, giving engineers the ability to tailor loadings and selectivities of solutes for difficult separations. It is necessary to have a better understanding of the special intermolecular interactions that occur in SCF solutions to predict the effects of cosolvents. We use u SCF chromatographic technique to acquire a database of cosolvent effects for a variety of cosolvents and solutes; examination of the cosolvent effects shows evidence of hydrogen bonding, charge transfer complex formation, and dipole-dipole coupling between solute and cosolvent molecules. SCF solvents, carbon dioxide, ethane, and fluoroform, are compared, and then the use of the chromatograph to measure solubilities is discussed.

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Solubilities of naphthalene in (CO2 + C2H6) and (CO2 + C3H8) up to 333 K and 17.7 MPa

Cited by 18 publications

References 21 publications

Phase Behavior and Reliable Computation of High-Pressure Solid−Fluid Equilibrium with Cosolvents

Phase Behavior and Reliable Computation of High-Pressure Solid−Fluid Equilibrium with Cosolvents

Solubility of Solids and Liquids in Supercritical Fluids

Cosolvent interactions in supercritical fluid solutions

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