Effect of temperature and concentration in catalytic deactivation of a parallel (competitive) reaction system: Application to hydrotreating of vacuumgas oil

The temperature-time sequences to maintain constant the concentration of on e product In a two-parallel (competitive) exothermic reaction system underg oing catalyst deactivation are analyzed. Kinetics is described by a power l aw model and linear particle deactivation. A computational algorithm and a parametric study for adiabatic packed bed reactors are presented. It is fou nd that temperature-time trajectories are strongly influenced by mean activ ity, and the selectivity. Experimental Information for Hydrotreating of vac uum gas oil was obtained keeping constant desulfurization, while hydrocrack ing and denitrogenation are function of time. Trajectories and final operat ing temperature are predicted with error below 2% compared to real operatio n.