Collect. Czech. Chem. Commun. 1992, 57, 2524-2528

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

Chavdar D. Vladova, Lachezar A. Petrova, Cao Anh Dungb and Bles Ytuaa

a Institute of Kinetics and Catalysis, Bulgarian Academy of Sciences, ul. acad. G. Bonchev, Sofia 1113, Bulgaria
b Institute of Organic Chemistry, Vietnamese Academy of Sciences, Hanoi, Vietnam


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.