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Received August 20, 2008
Accepted November 2, 2008
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Measurement of VLE data for propane+1,1-difluoroethane at various temperatures from 268.15 to 333.15K
Department of Chemical and Biomolecular Engineering, Sogang University, C.P.O. Box 1142, Seoul 100-611, Korea
limjs@sogang.ac.kr
Korean Journal of Chemical Engineering, January 2009, 26(1), 206-213(8), 10.1007/s11814-009-0034-9
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Abstract
Isothermal vapor-liquid equilibrium data for the binary systems of propane (R-290) (1)+1,1-difluoroethane (HFC-152a) (2) were measured at eight temperatures of (268.15, 273.15, 283.15, 293.15, 303.15, 313.15, 323.15 and 333.15 K), respectively. The experiments were performed with a circulation-type equilibrium apparatus to measure temperature, pressure, and the compositions of the liquid and vapor phases. The experimental data were correlated with the Peng-Robinson equation of state (PR-EoS) using the Wong-Sandler mixing rules and the Carnahan-Starling-DeSantis equation of state (CSD EoS). Calculated results showed good agreement with experimental data. It was found that this system has very strong positive azeotropes for all the temperature ranges studied here.
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References
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Coquelet C, Chareton A, Valtz A, Baba-Ahmed A, Richon D, J. Chem. Eng. Data, 48, 317 (2003)
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Peng DY, Robinson DB, Ind. Eng. Chem. Fundam., 15, 59 (1976)
Wong DSH, Sandler SI, AIChE J., 38, 671 (1992)
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Wong DSH, Orbey H, Sandler SI, Ind. Eng. Chem. Res., 31, 2033 (1992)
Renon H, Prausnitz JM, AIChE J., 14, 135 (1968)
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McLinden MO, Klein SA, Lemmoon EW, Peskin AP, Thermodynamic properties of refrigerants and refrigerant mixtures database (REFPROP), V.6.01, NIST (1998)
