Effect of Piperidine Addition in Sulfidation of CoMo/Al2O3 Catalysts on Their Activity and Selectivity in Thiophene Hydrodesulfurization

The effect of piperidine on a commercial Co/Mo/Al2O3 catalyst upon its sulfidation and during thiophene hydrodesulfurization has been studied. The experiments were carried out under atmospheric pressure. Upon sulfidation of the catalyst in the presence of nitrogen-containing compound, a reversible deactivation of hydrodesulfurization active sites and/or an irreversible deactivation of the hydrogenation and isomerization active sites were observed.