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Received February 9, 2004
Accepted June 24, 2004
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Vapor-Liquid Equilibria Measurement of Carbon Dioxide+1-Hexene and Carbon Dioxide+2-Ethyl-1-Butene Systems at High Pressure
Department of Chemical Engineering, Yosu National University, Yosu, Chonnam 550-749, Korea 1Department of Ceramic, Daegu Technical College, Daegu 704-721, Korea
Korean Journal of Chemical Engineering, September 2004, 21(5), 1032-1037(6), 10.1007/BF02705589
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Abstract
Pressure-composition isotherms were obtained for the carbon dioxide+1-hexene system at 40, 60, 80, 100 and 120 °C and pressure up to 120 bar and for carbon dioxide+2-ethyl-1-butene system at 40, 75 and 100 °C and pressure up to 115 bar. The accuracy of the experimental apparatus was tested by comparing the measured phase equilibrium data of the carbon dioxide+1-hexene system at 40 °C and 60 °C with those of Wagner and Wichterle [1987], and Jennings and Teja [1989]. The solubility of 1-hexene and 2-ethyl-1-butene for the carbon dioxide+1-hexene and carbon dioxide+2-ethyl-1-butene systems increases as the temperatures increases at constant pressure. These two carbon dioxide-polar solute systems exhibit type-I phase behavior, Which is characterized by an uninterrupted critical mixture curve that has a maximum in pressure. The experimental data are modeled by using the Peng-Robinson equation of state. A good fit of the data is obtained with Peng-Robinson equation of state using two adjustable parameters for carbon dioxide+1-hexene and carbon dioxide+2-ethyl-1-butene systems.
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Kuester JL, Mize JH, "Optimization Techniques with Fortran," McGraw-Hill Book Company, New York (1973)
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