“…Regarding the modelling of HDS processes, important developments have been made in recent years with different approaches and assumptions; most contributions usually neglect the hydrodynamic behaviour and consider the solid phase effects, such as the catalyst shape and the distribution of the void phase, using form factors or empirical correlations. [29][30][31] In addition, it is common to find models in literature in which the kinetic behaviour of the TBR is addressed by considering plug flow models, yet overlooking the hydrodynamics behaviour of the reactor and, therefore, neglecting important transport phenomena as radial dispersion and the coupling with the two-phase hydrodynamics. [29,32,33] Furthermore, the effects of the intraparticle mass resistances in catalyst and the mass interchange between fluid-solid and gas-liquid phases are incorporated through effectiveness factors [29,33] and using a volumetric exchange term.…”