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Efficient phase equilibrium calculation in a reduced flash context

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Dan Vladimir Nichita and Florea Minescu

Editorial: Canadian Journal of Chemical Engineering, 82 (6), p.1225-1238, 2004.


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 (2m+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.

Cuvinte cheie: equation of state; flash calculation; reduced variables; convergence; extrapolation