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CHEMICAL ENGINEERING
Figure 8.3. (b)De Priesterchart K-values for hydrocarbons, high temperature
8.16.10. Choice of phase equilibria for design calculations
The choice of the best method for deducing vapour-liquid and liquid-liquid equilibria for
a given system will depend on three factors:
1. The composition of the mixture (the class of system)
2. The operating pressure (low, medium or high)
3. The experimental data available.
Classes of mixtures
For the purpose of deciding which phase equilibrium method to use, it is convenient to
classify components into the classes shown in Table 8.10.
