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Density Marching Method for Drawing Phase Envelopes. 3. P-xy Diagrams of Binary Mixtures
Published in American Chemical Society
2017
Volume: 56
   
Issue: 46
Pages: 13894 - 13904
Abstract
Some of the most widely used commercial process simulators and property programs cannot calculate P-xy diagrams of even simple binary mixtures satisfactorily when the specified temperature is greater than the critical temperature of one of the two components because of the limitations of the methods used by them currently. In this paper, we present a new method for drawing P-xy diagrams of binary mixtures that overcomes the limitations of the present methods. In the proposed method, the density of the vapor/liquid phase is varied systematically and the saturation point calculated at each of the specified density (instead of the conventional specified concentration) to generate P-xy diagrams. Two different approaches have been presented for the calculation of saturation points at specified density. The methods presented are an extension of the density marching method presented earlier for drawing two-phase and three-phase isopleths. A number of zeotropic and azeotropic mixture examples are presented to demonstrate the methods. © 2017 American Chemical Society.
About the journal
JournalData powered by TypesetIndustrial and Engineering Chemistry Research
PublisherData powered by TypesetAmerican Chemical Society
ISSN08885885
Open AccessNo
Concepts (12)
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    Bins
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    Graphic methods
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    Mixtures
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    AZEOTROPIC MIXTURE
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    COMMERCIAL PROCESS SIMULATORS
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    Critical temperatures
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    MARCHING METHOD
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    PHASE ENVELOPE
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    SATURATION POINT
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    Three phase
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    Two-component
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    Binary mixtures