Phase equilibria of palm oil, palm kernel oil, and oleic acid+supercritical carbon dioxide and modeling using Peng–Robinson EOS

Hong, Seung Ah; Kim, Jae Duck; Kim, Jae-Hoon; Kang, Jeong Won; Kang, Ik Joong

doi:10.1016/j.jiec.2010.03.009

Cited by 17 publications

(7 citation statements)

References 37 publications

(53 reference statements)

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“…49 Uncertain EOS parameters used in this study are critical properties and acentric factor for plus fractions along with binary interaction parameters between mixture components as suggested by previous authors. 34,50 Results pertinent to the EOS calibration procedure for all samples are provided as Supporting Information.…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

Enhanced Method-of-Characteristics Approach for Determination of Minimum Miscibility Pressure in Displacements with Bifurcated Phase Behavior

Vatandoost

Movaghar

2019

Ind. Eng. Chem. Res.

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Determination of minimum miscibility pressure (MMP) is an imperative component of optimally designing miscible gas injection processes. Semianalytical method of characteristics (MOC) is superior to other available computational and experimental methods for MMP determinations. However, the MOC method inaccurately overestimates MMP for complicated CO2 displacements involved with bifurcated phase behavior. This drawback has been addressed in a study wherein a time-consuming and cumbersome modification has been suggested. In this study, a prompt and convenient approach is introduced to precisely consider the impact of bifurcated phase behavior on MMP calculations. This approach is established based upon an innovative hypothesis that bifurcated phase behavior merely emerges where a key component with the largest percentage in the mixture disappears through the composition route from initial oil to the injection gas. The performance of the proposed approach is minutely examined within several displacement scenarios with an emphasis on pure CO2 injection. The obtained results confirm that the bifurcated phase behavior can be accurately distinguished within the composition route. Furthermore, the procedure of MMP calculations is achieved mush swifter especially for multicomponent mixtures (i.e., up to 170% less in time). On the basis of the above arguments, it is clear-cut that the proposed method holds a remarkable potential in the applications related to miscible displacement.

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Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

Enhanced Method-of-Characteristics Approach for Determination of Minimum Miscibility Pressure in Displacements with Bifurcated Phase Behavior

Vatandoost

Movaghar

2019

Ind. Eng. Chem. Res.

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“…In order to accurately correlate the pressure measurement of the ethyl acetate-palm oil system, the experimental measurement values were compared with the data calculation from the Peng-Robinson equation of state (PR EOS) [24] for predicting the vapor pressure and phase behavior near the critical temperature of single-component system. The values of critical pressure and temperature as well as other key properties of the pure substances (palm oil and ethyl acetate) used in this study are listed in Table 1 [25,26].…”

Section: Apparatus and Proceduresmentioning

confidence: 99%

Density of Ethyl Acetate-Palm Oil Mixture in Supercritical Condition

Komintarachat

Sawangkeaw

Ngamprasertsith

2015

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The non-catalytic interesterification of palm oil in supercritical ethyl acetate in continuous system to produce biofuel is complex to understand thermodynamic properties during extreme condition, particularly density of two reactants. In this study, an indirect procedure for density measurement of palm oil and ethyl acetate mixture in a batch system at high temperature and pressure was experimentally investigated using isochoric method. Its apparatus comprise a constant volume reactor which was individually loaded with a mixture of ethyl acetate and palm oil in different molar ratios (10:1 to 30:1) and global densities (0.26 to 0.53 g/cm 3). During temperature increment, the changing of pressure was recorded in real-time to obtain the pressure-temperature relationship. After measuring the change of pressure at various global densities, the pressure-temperature related specific global density diagram was successfully constructed. At high global densities and high molar ratios of ethyl acetate to palm oil, the transition point took place closing to the estimated phase boundaries separating the region of vapor-liquid and homogenous phase of the mixture. The results will be further employed as database for accurate residence time calculation in continuous reactor, especially for biofuel production from palm oil in supercritical ethyl acetate.

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“…The solubility of reactants is an important factor for the occurrence of a chemical reaction. Therefore, knowing the effect of temperature, pressure, and composition on the phase behavior of a reaction system is key for determining the most favorable process conditions (Hong et al, 2010;Laudani et al, 2009). In particular, obtaining monoolein through esterification in supercritical CO 2 using solketal as the substrate instead of glycerol has not been investigated to date.…”

Section: Introductionmentioning

confidence: 99%

Determination Equilibrium Data Liquid-Vapor for High Pressure Systems Involving Carbon Dioxide + Solketal + Oleic Acid

Zanette¹,

Ferreira‐Pinto²,

Lima³

et al. 2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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This paper reports experimental phase equilibrium data for the systems {CO 2 (1)+ solketal(2)} and {CO 2 (1) + solketal(2) + oleic acid(3)}. The phase transition pressures measurements for ternary mixtures were carried out by injecting a known amount of carbon dioxide into a mixture with fixed molar ratios of the two other components [0.75 solketal + 0.25 oleic acid)]. A variable-volume cell with front window was used for obtaining experimental data. The temperature range from 308 to 338 K and pressures up to 20 MPa was obtained. Bubble point conditions were measured for the binary system {CO 2 (1) + solketal(2)}, whereas bubble and dew point conditions were measured for the ternary system {CO 2 (1) + solketal(2) + oleic acid(3)}.

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Phase equilibria of palm oil, palm kernel oil, and oleic acid+supercritical carbon dioxide and modeling using Peng–Robinson EOS

Cited by 17 publications

References 37 publications

Enhanced Method-of-Characteristics Approach for Determination of Minimum Miscibility Pressure in Displacements with Bifurcated Phase Behavior

Enhanced Method-of-Characteristics Approach for Determination of Minimum Miscibility Pressure in Displacements with Bifurcated Phase Behavior

Density of Ethyl Acetate-Palm Oil Mixture in Supercritical Condition

Determination Equilibrium Data Liquid-Vapor for High Pressure Systems Involving Carbon Dioxide + Solketal + Oleic Acid

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