Use of heat capacities for the estimation of cubic equation-of-state parameters—application to the prediction of very low vapor pressures of heavy hydrocarbons

• Published in: Fluid phase equilibria Vol. 200; no. 2; pp. 375 - 398
• Main Authors: Coniglio, Lucie, Rauzy, Evelyne, Péneloux, André, Neau, Evelyne
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.08.2002; Elsevier Science
• Subjects: Chemical thermodynamics; Chemistry; Cubic; Elements, mineral and organic compounds; Equation-of-state; Exact sciences and technology; Formulation of the temperature-dependent parameter a; General and physical chemistry; Heat capacities; Heavy hydrocarbons; Thermodynamic properties; Very low vapor pressures; Heavy hydrocarbons; Heat capacities; Formulation of the temperature-dependent parameter a; Cubic; Equation-of-state; Very low vapor pressures; Thermal properties; Equations of state; Hydrocarbon; Thermodynamic model; Vapor pressure; Prediction; Heat capacity; Theoretical study; Thermodynamic properties

Improvement in the prediction of very low vapor pressures is checked by introducing heat capacity data into the estimation of cubic equation-of-state (EOS) parameters. As the key parameter is the temperature-dependent parameter a, several expressions (mainly of exponential form) were investigated. A...