Dynamic modelling and simulation of ¹5N separation by chemical exchange in NO, NO2-HNO3 system.

The dynamic behaviour of a ¹5N separation process by chemical exchange in a NO, NO2-HNO3 system has been analysed based on an accurate mathematical model. A nonlinear system of first-order partial differential equations was determined by considering the multiple exchange reactions between the components of the gaseous mixture and the liquid phase constituents. The mathematical model of the process describes the space-time variation of the ¹5N mole fraction in gas and liquid phases and provides a better understanding of operating limits and decision support in process design and optimisation.