Multicomponent distillation simulation - distillation of air

This paper describes the application of a mathematical model to a column distilling air to produce nitrogen, oxygen, and argon. The upper column of a plant producing 400 tonnes/day (400 Mg/day) of oxygen is considered. Apart from any direct interest in this system, the outcome illustrates the problems which arise in the study of the separation of multicomponent systems. The effect of directed flow compared with normal flow is established, and in particular the way in which some components benefit more than others. The simulation uses experimental values of point efficiency and mixing measurements, and a good comparison with plant experience is achieved.