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Leibovici, Martine; Varikas, Éléni

doi:10.3917/tumu.021.0005

Tumultes

2003

DOI: 10.3917/tumu.021.0005

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Présentation

Martine Leibovici¹,

Éléni Varikas²

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2007

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“…The K -values are defined as Here, φ ir is the fugacity coefficient of the component i in a phase taken as reference, r . According to Leibovici, instead of using eqs A2 and A4, it is possible to define the following alternative relations in terms of the K -values and Material Balance Restriction. The material balance for a multiphase multicomponent system is given by Replacing eq A7 into A8 and using eq A6, we obtain This shows that the material balance is fulfilled.…”

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confidence: 99%

See 1 more Smart Citation

Improved Two-Sided Tangent Plane Initialization and Two-Phase-Split Calculations

Cañas-Marín¹,

Ortiz-Arango²,

Guerrero-Aconcha³

et al. 2007

Ind. Eng. Chem. Res.

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The initialization procedure proposed by Michelsen for locating stationary points in the tangent plane distance function was applied to several cases considered as challenging in the literature concerning phase equilibrium calculations. For most of the systems studied in the literature, such a simple procedure is enough to detect the phase instability; thus it is unnecessary to resort to more robust, more elaborated, and more time-consuming initialization schemes. For the conditions and systems where problems were found, a simple procedure was proposed to extend Michelsen's original scheme with the aim of increasing the probability of obtaining a negative value of the tangent plane distance function. Two algorithms for phase-split calculations were used. Both algorithms use a relaxation parameter to increase their convergence regions. No difficulties were found to calculate the equilibrium distributions in contrast with several convergence problems reported, in which other approaches were applied to the same two-phase systems.

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mentioning

confidence: 99%

“…Here, φ ir is the fugacity coefficient of the component i in a phase taken as reference, r . According to Leibovici, instead of using eqs A2 and A4, it is possible to define the following alternative relations in terms of the K -values and …”

mentioning

confidence: 99%

Improved Two-Sided Tangent Plane Initialization and Two-Phase-Split Calculations

Cañas-Marín¹,

Ortiz-Arango²,

Guerrero-Aconcha³

et al. 2007

Ind. Eng. Chem. Res.

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Présentation

Cited by 1 publication

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Improved Two-Sided Tangent Plane Initialization and Two-Phase-Split Calculations

Improved Two-Sided Tangent Plane Initialization and Two-Phase-Split Calculations

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