Peng-Robinson Equation of State
The Peng-Robinson equation of state is a cubic model that describes the thermodynamic properties of pure fluids and mixtures. Introduced by Ding-Yu Peng and David Bernard Robinson in 1976, it improves upon earlier models (van der Waals, Redlich-Kwong) by better predicting compressibility factors and phase equilibria, especially near the critical point. It is widely used in petroleum engineering, chemical process design, and natural gas calculations.
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- Peng, D. Y., & Robinson, D. B. (1976). A new two-constant equation of state. Industrial & Engineering Chemistry Fundamentals, 15(1), 59-64. · DOI 10.1021/i160057a011
- Reid, R. C., Prausnitz, J. M., & Sherwood, T. K. (1987). The Properties of Gases and Liquids (4th ed.). McGraw-Hill. · ISBN 978-0-07-051798-8
- Soave, G. (1972). Equilibrium constants from a modified Redlich-Kwong equation of state. Chemical Engineering Science, 27(6), 1197-1203. · DOI 10.1016/0009-2509(72)80096-4
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