화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.21, No.5, 1032-1037, September, 2004
DOI10.1007/BF02705589  Export Citation
Vapor-Liquid Equilibria Measurement of Carbon Dioxide+1-Hexene and Carbon Dioxide+2-Ethyl-1-Butene Systems at High Pressure
Hun-Soo Byun†, and Tae-Hyun Choi1
  • Department of Chemical Engineering, Yosu National University, Yosu, Chonnam 550-749, Korea
  • 1Department of Ceramic, Daegu Technical College, Daegu 704-721, Korea
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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.
Keywords:Phase Behavior;Carbon Dioxide;1-Butene;2-Ethyl-1-butene;Peng-Robinson Equation of State
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