Prediction of phase behavior in ternary mixtures with hydrofluocarbon as cosolvent

ZACUR JOSÉ L.; GONZO, ELIO E.

NATAL, BRAZIL, April 5^th to 9^th , 2010.

Congreso; PROSCIBA 2010. II Iberoamerican Conference on Supercritical Fluids; 2010

PROSCIBA

The aim of this work is to model the phase behavior of ternary mixtures, where one component is a second solvent (called a cosolvent or modifier). This is added to increase solubility and selectivity of natural solutes in supercritical fluids (effect co-solvent). The hydrofluorcarbon HFC-134a is proposed as a co-solvent of supercritical carbon dioxide (CO2). The first may present specific interactions with solute molecules capable of forming hydrogen bonds. The solutes considered are the natural terpenic compounds, 1,8-cineole and limonene. It is used for modeling an Group Contribution Associating Equation of State (GCA-EoS). This equation is widely used to predict phase equilibria and other thermophysical properties of mixtures containing molecules with association effects. In this work, it is applied to mixtures of CO2 and HFC-134a, in a system in which can occur specific interactions cosolvent/solute (CO2 present specific interactions with solute molecules capable of forming hydrogen bonds. The solutes considered are the natural terpenic compounds, 1,8-cineole and limonene. It is used for modeling an Group Contribution Associating Equation of State (GCA-EoS). This equation is widely used to predict phase equilibria and other thermophysical properties of mixtures containing molecules with association effects. In this work, it is applied to mixtures of CO2 and HFC-134a, in a system in which can occur specific interactions cosolvent/solute (CO2 present specific interactions with solute molecules capable of forming hydrogen bonds. The solutes considered are the natural terpenic compounds, 1,8-cineole and limonene. It is used for modeling an Group Contribution Associating Equation of State (GCA-EoS). This equation is widely used to predict phase equilibria and other thermophysical properties of mixtures containing molecules with association effects. In this work, it is applied to mixtures of CO2 and HFC-134a, in a system in which can occur specific interactions cosolvent/solute (CO2 present specific interactions with solute molecules capable of forming hydrogen bonds. The solutes considered are the natural terpenic compounds, 1,8-cineole and limonene. It is used for modeling an Group Contribution Associating Equation of State (GCA-EoS). This equation is widely used to predict phase equilibria and other thermophysical properties of mixtures containing molecules with association effects. In this work, it is applied to mixtures of CO2 and HFC-134a, in a system in which can occur specific interactions cosolvent/solute (CO2 present specific interactions with solute molecules capable of forming hydrogen bonds. The solutes considered are the natural terpenic compounds, 1,8-cineole and limonene. It is used for modeling an Group Contribution Associating Equation of State (GCA-EoS). This equation is widely used to predict phase equilibria and other thermophysical properties of mixtures containing molecules with association effects. In this work, it is applied to mixtures of CO2 and HFC-134a, in a system in which can occur specific interactions cosolvent/solute (CO2 2). The first may present specific interactions with solute molecules capable of forming hydrogen bonds. The solutes considered are the natural terpenic compounds, 1,8-cineole and limonene. It is used for modeling an Group Contribution Associating Equation of State (GCA-EoS). This equation is widely used to predict phase equilibria and other thermophysical properties of mixtures containing molecules with association effects. In this work, it is applied to mixtures of CO2 and HFC-134a, in a system in which can occur specific interactions cosolvent/solute (CO22 and HFC-134a, in a system in which can occur specific interactions cosolvent/solute (CO2 + HFC-134a + 1, 8-cineole), comparing it with another system where only there are dispersive interactions (CO2 + HFC-134a + limonene). The selected conditions for modeling are temperatures of 333.2 K, 343.2 K and 353.2 K, pressures of 75, 80 and 90 bar, and molar ternary compositions of HFC-134a between 2.5% and 25%. Under these conditions, the ternary phase equilibria are characterized as Type I: the solvent mixture is in the supercritical condition, sub-binary mixture cosolvent/solute is miscible in the entire range of composition and the other sub-binary mixture show phase separation. It is estimated a priori the phase behavior of these systems. Is predicted significant differences in solubility of both compounds in mixtures modified: for 1,8 cineol the increase in solubility is due to the specific interactions that may be present its molecules in these mixture, over the increase in density by the addition of cosolvent. For limonene, however, the model predicts that an increase in solubility in the solvent mixture would be due solely to an increase in the density. This means that, given the similar solubility of limonene and 1,8-cineole in pure supercritical CO2, adding a certain amount of HFC-134a enable the selective separation of 1,8-cineole from natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon in solubility of both compounds in mixtures modified: for 1,8 cineol the increase in solubility is due to the specific interactions that may be present its molecules in these mixture, over the increase in density by the addition of cosolvent. For limonene, however, the model predicts that an increase in solubility in the solvent mixture would be due solely to an increase in the density. This means that, given the similar solubility of limonene and 1,8-cineole in pure supercritical CO2, adding a certain amount of HFC-134a enable the selective separation of 1,8-cineole from natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon in solubility of both compounds in mixtures modified: for 1,8 cineol the increase in solubility is due to the specific interactions that may be present its molecules in these mixture, over the increase in density by the addition of cosolvent. For limonene, however, the model predicts that an increase in solubility in the solvent mixture would be due solely to an increase in the density. This means that, given the similar solubility of limonene and 1,8-cineole in pure supercritical CO2, adding a certain amount of HFC-134a enable the selective separation of 1,8-cineole from natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon in solubility of both compounds in mixtures modified: for 1,8 cineol the increase in solubility is due to the specific interactions that may be present its molecules in these mixture, over the increase in density by the addition of cosolvent. For limonene, however, the model predicts that an increase in solubility in the solvent mixture would be due solely to an increase in the density. This means that, given the similar solubility of limonene and 1,8-cineole in pure supercritical CO2, adding a certain amount of HFC-134a enable the selective separation of 1,8-cineole from natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon in solubility of both compounds in mixtures modified: for 1,8 cineol the increase in solubility is due to the specific interactions that may be present its molecules in these mixture, over the increase in density by the addition of cosolvent. For limonene, however, the model predicts that an increase in solubility in the solvent mixture would be due solely to an increase in the density. This means that, given the similar solubility of limonene and 1,8-cineole in pure supercritical CO2, adding a certain amount of HFC-134a enable the selective separation of 1,8-cineole from natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon The selected conditions for modeling are temperatures of 333.2 K, 343.2 K and 353.2 K, pressures of 75, 80 and 90 bar, and molar ternary compositions of HFC-134a between 2.5% and 25%. Under these conditions, the ternary phase equilibria are characterized as Type I: the solvent mixture is in the supercritical condition, sub-binary mixture cosolvent/solute is miscible in the entire range of composition and the other sub-binary mixture show phase separation. It is estimated a priori the phase behavior of these systems. Is predicted significant differences in solubility of both compounds in mixtures modified: for 1,8 cineol the increase in solubility is due to the specific interactions that may be present its molecules in these mixture, over the increase in density by the addition of cosolvent. For limonene, however, the model predicts that an increase in solubility in the solvent mixture would be due solely to an increase in the density. This means that, given the similar solubility of limonene and 1,8-cineole in pure supercritical CO2, adding a certain amount of HFC-134a enable the selective separation of 1,8-cineole from natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon in solubility of both compounds in mixtures modified: for 1,8 cineol the increase in solubility is due to the specific interactions that may be present its molecules in these mixture, over the increase in density by the addition of cosolvent. For limonene, however, the model predicts that an increase in solubility in the solvent mixture would be due solely to an increase in the density. This means that, given the similar solubility of limonene and 1,8-cineole in pure supercritical CO2, adding a certain amount of HFC-134a enable the selective separation of 1,8-cineole from natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon in solubility of both compounds in mixtures modified: for 1,8 cineol the increase in solubility is due to the specific interactions that may be present its molecules in these mixture, over the increase in density by the addition of cosolvent. For limonene, however, the model predicts that an increase in solubility in the solvent mixture would be due solely to an increase in the density. This means that, given the similar solubility of limonene and 1,8-cineole in pure supercritical CO2, adding a certain amount of HFC-134a enable the selective separation of 1,8-cineole from natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon natural mixtures containing both compounds. It is estimated, with the model, temperature, pressure and composition of cosolvent under which can be separated, with greater selectivity, these compounds. The use of HFC-134a, a fluid with high volatility in the extract under low pressure, does not leave residues that must be treated after. The pressure for the supercritical mixtures proposed is closest to the critical pressure of CO2, with its influence on the sizing of equipment and energy consumption. Keywords: cosolvent, phase equilibria, hydrofluorocarbon consumption. Keywords: cosolvent, phase equilibria, hydrofluoroc