Generalized Phase Boundary Determination Algorithm for Multicomponent Mixtures

An improved method to determine phase boundaries for multicomponent mixtures is described. This technique uses procedures based upon Gibbs minimization that lead to a more efficient algorithm that can also converge closer to the mixtures’ critical points than other algorithms (e.g., K-value method)....

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Bibliographic Details
Published inIndustrial & engineering chemistry research Vol. 50; no. 1; pp. 97 - 101
Main Authors Ortiz-Vega, Diego O, Cristancho, Diego E, Hall, Kenneth R, Iglesias-Silva, Gustavo A
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 05.01.2011
Subjects
Applied sciences
Chemical engineering
Exact sciences and technology
Separations
Multicomponent mixture
Algorithm
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Summary:An improved method to determine phase boundaries for multicomponent mixtures is described. This technique uses procedures based upon Gibbs minimization that lead to a more efficient algorithm that can also converge closer to the mixtures’ critical points than other algorithms (e.g., K-value method). Moreover, all the curves reported correspond to stable points according to the stability analysis suggested by Michelsen that implies minimization of the tangent plane distance function. Several examples compare the efficiency of this technique to commercial programs that often fail at certain conditions around the critical point, cricondenbar, and/or cricondentherm.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie901830c