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Generalization of the binary interaction parameter of the Peng-Robinson equation of state by component family Export

Fluid Phase Equilibria, Vol. 42, No. 1. (1988), pp. 43-62.

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Binary interaction parameters of the Peng-Robinson equation of state are successfully correlated in terms of the ratio of critical molar volumes and in addition absolute difference between the acentric factors of each component. The constants of a correlated function depend on some substance groups including chemically similar normal fluids. This correlation covers systems composed of hydrocarbons, carbon dioxide, nitrogen and hydrogen sulfide. VLE calculation for more than 100 binary and ternary systems showed excellent correlation. Improved prediction of vapor-liquid equilibria can be expected for these systems where little or no data is available.


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