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Efficient Phase Equilibrium Calculation in a Reduced Flash Context
Author(s) -
Nichita Dan Vladimir,
Minescu Florea
Publication year - 2004
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.5450820610
Subject(s) - extrapolation , flash evaporation , binary number , robustness (evolution) , context (archaeology) , phase equilibrium , mathematics , zero (linguistics) , thermodynamics , flash (photography) , phase (matter) , statistical physics , chemistry , mathematical analysis , physics , optics , quantum mechanics , arithmetic , biochemistry , linguistics , philosophy , gene , paleontology , biology
A new and efficient method for phase equilibrium calculations using cubic equations of state (EOS) has been developed. The reduced flash technique presented here takes into account non‐zero binary interaction coefficients (BIC's), and requires the iterative correction of a reduced number of independent variables (2 m +3, where m is the number of components with non‐zero BIC's), irrespective of the number of components in the mixture. A new extrapolation procedure, called the Direct Reduced Flash Calculation (DRFC) is formulated. Calculations performed for several hydrocarbon mixtures with emphasis to the near‐critical region prove the robustness and the efficiency of the proposed method.