Anwendung der Mischphasen‐Thermodynamik auf die Berechnung von thermischen Stofftrennverfahren

Use of multiphase thermodynamics in the calculation of thermal separation processes . The methods currently in use for calculation of the equilibrium between phases are reviewed. It is shown that such methods can be subdivided into those based on: (i) equations of state, (ii) the correspondence principle, and (iii) molecular behaviour. The latter methods have proved to be especially successful. They are based on simple and plausible representations of the interactions between atoms and molecules and can be further subdivided into methods according to the principle of local composition, in which further measurements are required, and into methods according to the principle of group increments, in which data can also be precalculated if no measurements are available. For practical purposes, however, rough methods of calculation also afford a good guide. They are often sufficiently accurate for an initial calculation and can be carried out, without the use of a computer, either with the aid of graphical methods or with a pocket calculator, so that parameter changes can be readily observed.