Traditionally, the teaching of phase equilibria emphasizes the relationships between the thermodynamic variables of each phase in equilibrium rather than its engineering applications. This book changes the focus from the use of thermodynamics relationships to compute phase equilibria to the design and control of the phase conditions that a process needs.

Phase Equilibrium Engineering presents a systematic study and application of phase equilibrium tools to the development of chemical processes. The thermodynamic modeling of mixtures for process development, synthesis, simulation, design and optimization is analyzed. The relation between the mixture molecular properties, the selection of the thermodynamic model and the process technology that could be applied are discussed. A classification of mixtures, separation process, thermodynamic models and technologies is presented to guide the engineer in the world of separation processes. The phase condition required for a given reacting system is studied at subcritical and supercritical conditions.

The four cardinal points of phase equilibrium engineering are: the chemical plant or process, the laboratory, the modeling of phase equilibria and the simulator. The harmonization of all these components to obtain a better design or operation is the ultimate goal of phase equilibrium engineering.

Key Features

  • Methodologies are discussed using relevant industrial examples
  • The molecular nature and composition of the process mixture is given a key role in process decisions
  • Phase equilibrium diagrams are used as a drawing board for process implementation


Chemical engineers, chemical industry R&D scientists and process engineering professionals, and graduate students in Applied Process Thermodynamics

Table of Contents

Series Page



Chapter 1. Phase Equilibrium and Process Development

1.1 The World of Phase Equilibria in Chemical Processes

1.2 Thermodynamic Modeling in Process Development

1.3 Definition of Phase Equilibrium Engineering

1.4 Phase Scenarios in Separation, Materials, and Chemical Processes

1.5 The Phase Design and the Phase Engineering Tools


Chapter 2. Intermolecular Forces, Classes of Molecules, and Separation Processes

2.1 Intermolecular Forces

2.2 Classification of Molecules

2.3 Separation Process Technology and Classes of Mixtures


Chapter 3. Phase Equilibrium Diagrams

3.1 Gibbs Criteria for Phase Equilibrium: The Phase Rule

3.2 The Phase Regions of Pure Components

3.3 Classification of Binary Fluid-Phase Behavior Diagrams

3.4 Classification of Ternary Fluid-Phase Behavior Diagrams

3.5 Phase Diagrams for Multicomponent Systems


Chapter 4. Physical Properties and Thermodynamic Models

4.1 Thermodynamic Modeling and Simulation

4.2 Physical Properties of Pure Compounds

4.3 The Compressibility Factor of Gases

4.4 The Virial EOS

4.5 Corresponding State Correlations

4.6 Prediction of Phase Equilibria

4.7 Predictive Models

4.8 Semiempirical Models

4.9 Selection of Thermodynamic Models

4.10 Problems

Appendix 4A

Appendix 4B


Chapter 5. A General Approach to Phase Diagrams for Binary Systems

5.1 Introduction and Scope

5.2 A Case That Required Special Analysis and New Tools

5.3 Some Problems and Solutions Regarding the Automated Calculation of Phase Diagrams

5.4 Different Projections of ULPEDs

5.5 Restricted Phase Diagrams (Beyond the Typical Cases)

5.6 Remarks and Conclusions



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© 2013
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