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An empirical method for calculating vapor‐liquid critical points of multicomponent mixtures
Author(s) -
Peng DingYu
Publication year - 1986
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450640517
Subject(s) - thermodynamics , methane , equation of state , critical point (mathematics) , binary number , hydrogen sulfide , reduced properties , carbon dioxide , chemistry , materials science , organic chemistry , physics , mathematics , mathematical analysis , sulfur , arithmetic
The critical temperatures and critical pressures of binary mixtures involving nitrogen, carbon dioxide, hydrogen sulfide, and paraffinic hydrocarbons ranging from methane through n ‐heptane as calculated from the Peng—Robinson equation of state have been correlated using a modified compositional function of the Wilson equation in conjunction with the pseudo‐critical properties. The resulting parameters have been used to predict the critical properties of sixty‐one multicomponent systems. The empirically calculated critical temperatures and critical pressures deviate from the rigorously calculated values by an average of less than 1 K and 100 kPa, respectively.