Measurement and Modeling of Phase Equlibrium of Binary Systems, Carbon Dioxide-Toluene and Carbon Dioxide-Ethanol at High Pressures for Determination of Optimum Condition of Fine Particles Production in the Gas Anti-Solvent Process

Document Type : Research Note

Authors

Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, I.R. IRAN

Abstract

In this research, high pressure vapor-liquid equilibrium apparatus built and the solubility of carbon dioxide in two organic solvents, toluene and ethanol, at temperature range 298.15-318.15 K and pressures up to 78 bar were measured. The obtained experimental data show that the solubility of carbon dioxide increases by increasing the pressure and decreases by increasing the temperature. The experimental data correlated by PR and SRK equation of states along with the van der Waals and Huron-Vidal mixing rules. The adjustable parameters and average absolute relative deviations of each model have been reported. The SRK-HV model with an average deviation of 2.52% for the carbon dioxide-toluene binary system at four temperatures and 3.79% for the carbon dioxide-ethanol system at three temperatures is the best between the studied models. Also the average deviation of SRK equation of state is 4.95% and the average deviation of PR equation of state, is 5.15% at all studied temperatures and pressures. The study of the relative volume expansions of toluene and ethanol show that 295.15 K and 57 bar are the best operating condition for gas anti-solvent process by using toluene and ethanol.

Keywords

Main Subjects

References

[1] Matson D.W., Fulton J.L., Petersen R.C., Smith R.D., Rapid Expansion of Supercritical Fluid Solutions: Solute Formation of Powders, Thin Film and Fibers, Ind. Eng. Chem. Res., 26, p. 2298 (1987).
[2] Chattopadhyay P., Gupta R.B., Production of Antibiotic Nanoparticles Using Supercritical CO2 as Antisolvent with Enhanced Mass Transfer, Ind. Eng. Chem. Res., 40, p. 3530 (2001).
[3] Kikic I., Lora M., Bertucco A., Thermodynamic Analysis of Three Phase Equilibria in Binary and Ternary Systems for Applications in Rapid Expansion of a Supercritical Solution (RESS), Particles from Gassaturated Solutions (PGSS) and Supercritical Antisolvent Crystallization (SAS), Ind. Eng. Chem. Res., 36, p. 5507 (1997). 
[4] Cocero M.J., Ferrero S., Crystallization of â-Carotene by a GAS Process in Batch: Effect of Operating Parameters, J. Supercrit. Fluids, 22, p. 237 (2002).
[5] Kalogiannis C.G., Eleni P., Panayiotou C.G., Production of Amoxicillin Microparticles by Supercritical Antisolvent Precipitation, Ind. Eng. Chem. Res., 44, p. 9339 (2005).
[6] de la Fuente J.C., Peters C.J., de Swaan Aronsqq J., Volume Expansion in Relation to the Gas Antisolvent Process, J. Supercrit. Fluids, 17, p. 13 (2000).
[7] Kordikowski A., Schenk A.P., Van Nielen R.M., Peters C.J., Volume Expansions and Vapor- Liquid Equilibria of Binary Mixtures of a Variety of Polar Solvents and Certain Near-Critical Solvents, J. Supercrit. Fluids, 8, p. 205 (1995).
[8] Prausnitz J.M., Benson P.R., Solubility of Liquids in Compressed Hydrogen, Nitrogen and Carbon Dioxide, AIChE J., 5, p. 161 (1959).
[9] Wu W., Ke J., Poliakoff M., Phase Boundaries of CO2 + Toluene, CO2 + Acetone, and CO2 + Ethanol at High Temperatures and High Pressures, J. Chem. Eng. Data, 51, p. 1398 (2006).
[10] Nemati Lay E., Taghikhani V., Ghotbi C., Measurement and Correlation of CO2 Solubility in the Systems of CO2 + Toluene, CO2 + Benzene, and CO2 + n-Hexane at Near-Critical and Supercritical Conditions, J. Chem. Eng. Data., 51, p. 2197 (2006).
[11] Peng D.Y., Robinson D.B., A New Two-Constant Equation of State, Ind. Eng. Chem. Fundam., 15, p. 59 (1976).
[12] Soave G., Equilibrium Constants From a Modified Redlich- Kwong Equation of State, Chem. Eng. Sci., 27, p. 1197 (1972).
[13] Prausnitz J.M., Rüdiger N.L., Gomes de Azevedo E., "Molecular Thermodynamics of Fluid-Phase Equilibria", 3 rd, Prentice-Hall, (1999).
[14] Huron M.J., Vidal J., New Mixing Rules in Simple Equations of State for Representing Vapor-Liquid Equilibria of Strongly Non-Ideal Mixtures, Fluid Phase Equilib., 3, p. 255 (1979).
[15] Reno H., Prausnitz J.M., Local Compositions in Thermodynamics Excess Functions for Liquid Mixtures, AIChE Journal, 14, p. 135 (1968).
[16] Fink S.D., Hershey H.C., Modeling the Vapor-Liquid Equilibria of 1,1,1-Trichloroethane+Carbon Dioxide and Toluene + Carbon Dioxide at 308, 323 and 353 K, Ind. Eng. Chem. Res., 29, p. 295 (1990).
[17] Jennings D.W., Lee R.J., Teja A.S., Vapor-Liquid Equilibria in the Carbon Dioxide + Ethanol and Carbon Dioxide + 1-Butanol Systems, J. Chem. Eng. Data., 36, p. 303 (1991).

Files

Share

How to cite

Statistics