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Vapor-Liquid Equilibrium Measurements and Modeling for Cyclohexane + Cyclohexanone

Abstract : The characteristically low conversion in the oxidation of cyclohexane to form cyclohexanol and cyclohexanone requires significant recovery work via distillation. In this study, new isothermal vapor-liquid equilibria (VLE) are presented for the cyclohexane + cyclohexanone binary system. Measurements were performed at temperatures of (423, 444, 464, and 484) K, using an apparatus based on the “static-analytic” method, with two ROLSI pneumatic capillary samplers. The generated data are correlated using two equations of state, namely, the Peng-Robinson coupled with the Wong-Sandler mixing rules and the perturbed-chain statistical associating fluid theory (SAFT) with a dipolar contribution by Jog and Chapman. While both models perform reasonably well in describing the phase equilibria, the Peng-Robinson is slightly better than the perturbed-chain SAFT equation of state and tends to be more easily implemented in industrial process simulators.
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Submitted on : Friday, March 4, 2011 - 12:35:50 PM
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Christophe Coquelet, Chien-Bin Soo, Alain Valtz, Dominique Richon, Daniel Amoros, et al.. Vapor-Liquid Equilibrium Measurements and Modeling for Cyclohexane + Cyclohexanone. Journal of Chemical and Engineering Data, American Chemical Society, 2010, 55, pp.4521-4524. ⟨10.1021/je100474b⟩. ⟨hal-00573700⟩



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