Phase equilibria of branched isomers of C10-alcohols and C10-alkanes in supercritical ethane

Zamudio, M.; Schwarz, Cara E.; Knoetze, J.H.

doi:10.1016/j.supflu.2011.07.004

Cited by 14 publications

(6 citation statements)

References 28 publications

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“…13, in comparison to isoplethic data in a lower temperature range. Note that these data from Zamudio et al [26] was not considered at all in the objective function. 3.…”

Section: The Ethane + N-alkane Seriesmentioning

confidence: 99%

High pressure phase behavior modeling of asymmetric alkane+alkane binary systems with the RKPR EOS

Cismondi

Galdo

Gomez

et al. 2014

Fluid Phase Equilibria

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“…13, in comparison to isoplethic data in a lower temperature range. Note that these data from Zamudio et al [26] was not considered at all in the objective function. 3.…”

Section: The Ethane + N-alkane Seriesmentioning

confidence: 99%

High pressure phase behavior modeling of asymmetric alkane+alkane binary systems with the RKPR EOS

Cismondi

Galdo

Gomez

et al. 2014

Fluid Phase Equilibria

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“…This model has previously been found to work well for the modeling of CO 2 + 1-alcohol + n-alkane systems compared to other models available in Aspen Plus 5,6,14,42 and the suitability of the model for the current systems was thus evaluated. The present systems are no more non-ideal than the 1-alcohol + nalkane systems, as the n-carboxylic acid and methyl ester compounds are less polar than the corresponding 1-alcohols.…”

Section: Thermodynamic Modeling Using Rk-aspenmentioning

confidence: 99%

“…Phase equilibrium data are vitally important for industry to assess the feasibility or viability of process unit operations such as separation methods or techniques, as well as optimization of these unit operations. Although a large amount of low-pressure and high-pressure binary phase behavior data are available, considerably less ternary data are available. − Previous studies by Schwarz and co-workers − and Schneider and co-workers − considered the ternary phase behavior of carbon dioxide (CO 2 ) + n -alkane + 1-alcohol systems. These studies identified that the ternary systems displayed complex phase behavior, such as cosolvency, that could not be inferred from knowledge of the constituent binaries.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High-Pressure Phase Behavior of CO₂ + (C₁₂/C₁₄ n-Alkane and/or C₈/C₁₀ Carboxylic Acid and/or C₁₂/C₁₄ Methyl Ester) Systems

Du Plessis,

Schwarz

2024

J. Chem. Eng. Data

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Twelve new ternary high-pressure bubble-and dew-point data sets for (n-carboxylic acid + n-alkane), (methyl ester + n-alkane), and (methyl ester + n-carboxylic acid) mixtures in carbon dioxide (CO 2 ) are presented in this study. For these mixtures, (C 8 and C 10 ) ncarboxylic acids, (C 12 and C 14 ) methyl esters, and (C 12 and C 14 ) nalkanes are considered. A liquid−liquid or liquid−liquid−vapor phase equilibria region was observed in the low solute fraction region for the 50 wt % n-tetradecane +50 wt % methyl myristate system, similar to the phase behavior observed for the CO 2 + n-tetradecane binary which exhibits type III phase behavior. Additionally, both the n-alkane + (ncarboxylic acid or methyl ester) groups showed indications of enhanced mixture solubility in comparison to the comprising binaries, with the ntetradecane + n-octanoic acid and n-tetradecane + methyl myristate mixtures presenting cosolvency at the experimental conditions considered. This is indicative of significant solute + solute interactions within these systems. In contrast the phase behavior of the ncarboxylic acid + methyl ester systems were essentially the average of the two comprising binaries, indicating that the phase behavior in these systems is not significantly affected by solute + solute interactions. Finally, the thermodynamic modeling of the data with the RK-ASPEN property method was considered, taking only solvent + solute binary interaction parameters (BIPs) into account. The solvent + solute BIPs were found to be sufficient to provide an adequate description of the experimental data, with the dew-point region generally being the best described region.

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“…Currently, separation of these mixtures is exacted by extractive distillation, while supercritical fluid fractionation has also been shown to be a feasible method . A large quantity of high-pressure phase equilibrium data have been measured for systems of 1-alcohol + n -alkanes in a variety of supercritical solvents including ethane, propane, and carbon dioxide. − In contrast, low-pressure vapor liquid equilibrium (LPVLE) data which can provide insight into the intermolecular interactions occurring between 1-alcohols and n -alkanes are not as readily available or well investigated. These data can also be used to improve the currently employed extractive distillation processes as well as thermodynamic modeling for these systems.…”

Section: Introductionmentioning

confidence: 99%

Low-Pressure Phase Equilibrium Data for Binary Systems of 1-Alcohols (C_nOH) and n-Alkanes (C_n+2)

2023

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Five new isobaric vapor−liquid equilibrium data sets for 1alcohol (C n OH) + n-alkane (C n+2 ) systems were measured at 40 kPa, including 1-hexanol + n-octane, 1-heptanol + n-nonane, 1-octanol + n-decane, 1-nonanol + n-undecane, and 1-decanol + n-dodecane. The data were measured utilizing a verified all-glass dynamic recirculating still, and all data sets passed the L/W, McDermott−Ellis, and Fredenslund thermodynamic consistency tests. Each of the five measured systems exhibited positive azeotropy, which is indicative of positive deviations from ideality, in alignment with the previously measured C n OH + C n+3 and C n OH + C n+4 systems. The PSRK + UNIFAC, NRTL, and PSRK + NRTL models were used to predict or correlate each of the newly measured systems, and the NRTL model consistently performed better than both of the PSRK model variations. The PSRK + UNIFAC model, however, still provided reasonable model predictions for the lower homologue combinations and can therefore be used to predict phase behavior for similar systems in the absence of experimental phase equilibrium data.

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Phase equilibria of branched isomers of C10-alcohols and C10-alkanes in supercritical ethane

Cited by 14 publications

References 28 publications

High pressure phase behavior modeling of asymmetric alkane+alkane binary systems with the RKPR EOS

High pressure phase behavior modeling of asymmetric alkane+alkane binary systems with the RKPR EOS

High-Pressure Phase Behavior of CO₂ + (C₁₂/C₁₄ n-Alkane and/or C₈/C₁₀ Carboxylic Acid and/or C₁₂/C₁₄ Methyl Ester) Systems

Low-Pressure Phase Equilibrium Data for Binary Systems of 1-Alcohols (C_nOH) and n-Alkanes (C_n+2)

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Phase equilibria of branched isomers of C10-alcohols and C10-alkanes in supercritical ethane

Cited by 14 publications

References 28 publications

High pressure phase behavior modeling of asymmetric alkane+alkane binary systems with the RKPR EOS

High pressure phase behavior modeling of asymmetric alkane+alkane binary systems with the RKPR EOS

High-Pressure Phase Behavior of CO2 + (C12/C14 n-Alkane and/or C8/C10 Carboxylic Acid and/or C12/C14 Methyl Ester) Systems

Low-Pressure Phase Equilibrium Data for Binary Systems of 1-Alcohols (CnOH) and n-Alkanes (Cn+2)

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High-Pressure Phase Behavior of CO₂ + (C₁₂/C₁₄ n-Alkane and/or C₈/C₁₀ Carboxylic Acid and/or C₁₂/C₁₄ Methyl Ester) Systems

Low-Pressure Phase Equilibrium Data for Binary Systems of 1-Alcohols (C_nOH) and n-Alkanes (C_n+2)