Phase equilibria with supercritical components

High-pressure phase equilibria with compressed gases.

An apparatus is described that is capable of determining high-pressure vapor-liquid equilibrium, liquid-liquid equilibrium, solid-liquid-vapor equilibrium, vapor-liquid-liquid equilibrium, and mixture critical points and transitions. The device is capable of temperatures to 150 degrees C and pressures to 300 bars (higher with slight modifications). The construction and operation are described i...

Analytical applications of liquid-liquid phase equilibria: analysis of binary mixtures of chemically similar components.

A new, simple and rapid method based on the principle of liquid-liquid phase equilibria has been developed for the analysis of binary mixtures of chemically similar organic compounds. The method does not require elaborate instrumentation and can be used to analyse mixtures of members of homologous series. The application of the method has been illustrated by analysing binary mixtures of n-hexan...

Molecular Simulation of Phase Equilibria

This chapter presents an introduction to the rapidly expanding field of molecular simulation methodologies for calculations of fluid-phase coexistence, with particular emphasis on high pressure and supercritical systems. The first part of the chapter deals with methodological issues. The focus is on Monte-Carlo techniques for the determination of free energies and phase equilibria. Particle ins...

Phase Equilibria of Polydisperse Colloids

A set of colloidal particles (be they sterically-or charge-stabilized) can never be made truly identical. They are polydisperse in their sizes (or charges), and their interactions are a function of that property. A truly polydisperse system in the thermodynamic limit contains innnitely many species. Therefore, calculations of phase equilibria involve innnitely many coexistence constraints (a di...

Modelling phase equilibria in systems