The dispersion model is used to describe nonideal tubular reactors and it takes into account that a deviation from the ideal plug flow can occur in real tube reactors by means of axial dispersion superimposed to the bulk flow, leading to a parabolic velocity profile. Axial dispersion can occur due to molecular diffusion and backmixing, introduced by turbulent eddies and fluctuations in velocity. The dimensionless number to describe these effects is the axial dispersion coefficient Dax, which is considered constant throughout the reaction section. The