Phase Equilibria of the Systems CO2 + Styrene, CO2 + Safrole, and CO2 + Styrene + Safrole

Tenório‐Neto, Ernandes T.; Kunita, Marcos H.; Rubira, Adley F.; Leite, Bruno Meireles; Dariva, Cláudio; Santos, Alexandre F.; Fortuny, Montserrat; Franceschi, Elton

doi:10.1021/je400110c

Cited by 8 publications

(3 citation statements)

References 40 publications

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“…Windmann et al improved the Peng–Robison equation of state (PR EoS) with the quadratic mixing rule or the Huron–Vidal mixing rule to correlate the experimental data for the solubility of nitrogen in acetone and oxygen in acetone and noted that the results of the quadratic mixing rule were very similar to those from the Huron–Vidal mixing rule. Tenório Neto et al found that the experimental data were satisfactorily represented by the PR EoS with the quadratic mixing rule. The results confirmed that PR EoS with the quadratic mixing rule or the Huron–Vidal mixing rule can be used for good prediction of the oxygen (nitrogen)–organic solvent equilibrium.…”

Section: Introductionmentioning

confidence: 97%

Experimental Investigation on the Solubility of Oxygen in Toluene and Acetic Acid

Deng

Yan

et al. 2014

Ind. Eng. Chem. Res.

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By using the dual vessel equilibrium method, the solubility of oxygen in toluene and acetic acid was experimentally investigated with pressure ranging from 0.1 to 1.0 MPa at temperatures from 293.1 to 383.1 K. The results show that the oxygen solubility either in toluene or in acetic acid increases with a rise in temperature. On the basis of the experimental data, Henry coefficients were derived and expressed as a function of temperature. At the same temperature, Henry coefficient for the oxygen–toluene system is lower than that for the oxygen–acetic acid system. Through analysis of the Gibbs energy (ΔG 0), partial molar enthalpy (ΔH 0), and the partial molar entropy (ΔS 0) of the solvation, we can know that solubilization of oxygen either in toluene or in acetic acid is an endothermic process. To correlate the experimental data, the Peng–Robinson equation of state with the quadratic mixing rule was used for the two systems.

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Section: Introductionmentioning

confidence: 97%

Experimental Investigation on the Solubility of Oxygen in Toluene and Acetic Acid

Deng

Yan

et al. 2014

Ind. Eng. Chem. Res.

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“…The experimental apparatus and procedure were based on the static synthetic method, whose use is widely documented in the literature. − A diagram of the experimental apparatus used in this work for phase equilibrium measurements is shown in Figure .…”

Section: Methodsmentioning

confidence: 99%

Phase Behavior for the System Carbon Dioxide + p-Nitrobenzaldehyde: Experimental and Modeling

et al. 2019

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The experimental study and thermodynamic modeling of the phase behavior of pressurized reactional systems allows the optimization of several unit operations involved in the process of product formation. In this work, experimental data of phase equilibria for the CO 2 + p-nitrobenzaldheyde binary system were obtained through the static synthetic method. The range of temperature, pressure, and p-nitrobenzaldehyde molar fraction investigated were 281−353 K, 6.5−25.0 MPa, and 2.638 × 10 −3 to 5.903 × 10 −3 , respectively. A model previously developed to describe asymmetric mixtures presenting fluid and solid phases was applied to describe the phase behavior of the system. This model uses the Peng−Robinson equation of state (PR-EoS) to describe the properties of the fluid phases and an expression for the fugacity of p-nitrobenzaldehyde as a pure solid for the solid phase. Different model parametrization strategies were studied, and complete isopleths were calculated considering the fluid−fluid, solid−fluid, and solid−fluid−fluid phase equilibria over wide ranges of temperature and pressure. The experimental results showed nonmonotonic (local minimum) solid−fluid phase behavior for all mixture compositions investigated. The model employed and the parametrization strategies were able to describe the experimentally observed phase behavior.

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“…All experimental data of the measured phase equilibria were recorded in a variable volume view cell based on the static synthetic methodology. An apparatus description can be found in the literature. − …”

Section: Methodsmentioning

confidence: 99%

High-Pressure Phase Behavior for Poly(ethylene glycol) and 1,1,1,2-Tetrafluorethane Systems

et al. 2017

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The development of polymeric systems for drug delivery has received attention with the aim of producing new systems as an alternative to conventional drug therapy. The design of new systems for this purpose in a compressed medium requires a knowledge of the phase behavior for the polymeric matrix in the high-pressure fluids. This work reports the phase equilibrium experimental data of binary systems involving poly(ethylene glycol) (PEG) with molecular weights of 1000 and 2000 g•mol −1 and 1,1,1,2-tetrafluoroethane (HFA-134a). The experimental data were obtained in a high-pressure variable-volume viewing cell based on the static synthetic method at temperatures from 287.4 to 334.2 K, pressures of up to 29.81 MPa, and a PEG concentration in the range of 1 to 7 wt %. Liquid−liquid equilibrium, liquid−liquid−vapor equilibrium, and, in some cases, solid−liquid equilibrium were observed under the experimental conditions of pressure, temperature, and compositions investigated. The experimental results show that temperature and pressure have significant influences on the solubility of PEG in HFA-134a. The solid-phase formation for the system PEG + HFA-134a, in the range of values investigated for temperature, pressure, and compositions, is influenced by the molecular weight of the polymer.

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Phase Equilibria of the Systems CO₂ + Styrene, CO₂ + Safrole, and CO₂ + Styrene + Safrole

Cited by 8 publications

References 40 publications

Experimental Investigation on the Solubility of Oxygen in Toluene and Acetic Acid

Experimental Investigation on the Solubility of Oxygen in Toluene and Acetic Acid

Phase Behavior for the System Carbon Dioxide + p-Nitrobenzaldehyde: Experimental and Modeling

High-Pressure Phase Behavior for Poly(ethylene glycol) and 1,1,1,2-Tetrafluorethane Systems

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