Estudio del efecto de un pretratamiento de nitración sobre la activtidad en htorodesulfuración de un catalizador comercial de Ni-Mo/Al₂O₃

In this work, it was studied the effect of a nitridation pretreatment with ammonia at temperatures between 500 and 900&C, on the activity of a commercial Ni-Mo/Al₂O₃ catalyst. The nitrided catalyst was characterized by XPS and BET surface area. The presence of Mo⁺² and Mo⁰ in the catalyst nitrided at 700°C, as detected by XPS, could be related to the possible active species. Thiophene conversion was doubled when the commercial catalyst was nitrided followed by sulfiding-reduction «in situ» pretreatment.