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Chemical Engineering

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SelectedWorks

Selected Works

2006

Phase equilibrium

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An Algebraic Formulation For An Equal Area Rule To Determine Phase Compositions In Simple Reactive Systems, Gustavo A. Iglesias-Silva, Adrian Bonilla-Petriciolet, Kenneth R. Hall Jan 2006

An Algebraic Formulation For An Equal Area Rule To Determine Phase Compositions In Simple Reactive Systems, Gustavo A. Iglesias-Silva, Adrian Bonilla-Petriciolet, Kenneth R. Hall

Adrian Bonilla-Petriciolet

Equal area rules are fundamental constructs in thermodynamics for determining conditions of equilibrium. The Maxwell equal area rule (MEAR) provides saturated volumes when the two-phase isotherm/isobar cuts the van derWaals loops such that the areas above and below are equal. Another equal area rule exists for determining the phase compositions in a binary mixture when plotting the derivative of the total Gibbs energy against the composition. In this work, we show that in the determination of phase compositions in reactive systems, an equal area rule exists under the correct transformation of the mole fractions.


Bubble And Dew Point Calculations In Multicomponent And Multireactive Mixtures, Adrian Bonilla-Petriciolet, Azucena Acosta-Martínez, Ulises I. Bravo-Sánchez, Juan Gabriel Segovia-Hernández Jan 2006

Bubble And Dew Point Calculations In Multicomponent And Multireactive Mixtures, Adrian Bonilla-Petriciolet, Azucena Acosta-Martínez, Ulises I. Bravo-Sánchez, Juan Gabriel Segovia-Hernández

Adrian Bonilla-Petriciolet

Bubble and dew point calculations are useful in chemical engineering and play an important role in the study of separation equipments for non-reactive and reactive mixtures. To the best of the authors’s knowledge, few methods have been proposed for these calculations in systems with several chemical reactions. The objective of this paper is to introduce new conditions for performing bubble and dew point calculations in reactive mixtures. We have developed these conditions based on the application of transformed variables of Ung and Doherty (1995). Using these transformed variables, the solution space is restricted to compositions that are already at chemical …