Study of hydrodesulfurization by the use of sulfur-35-labeled dibenzothiophene. 2. Behavior of sulfur in hydrodesulfurization, hydrodeoxygenation, and hydrodenitrogenation on a sulfided molybdenum/alumina catalyst

To investigate the behavior of sulfur during the hydrodesulfurization (HDS), 35 S-labeled dibenzothiophene ([ 35 S]DBT) was reacted on a sulfided Mo/Al 2 O 3 . It was found that 35 S in [ 35 S]DBT was accommodated on the catalyst and the concentration of 35 S on the catalyst always reached a steady state under fixed reaction conditions. 35 S accommodated on the catalyst cannot be removed without the incorporation of sulfur from HDS of sulfur compounds such as DBT, benzothiophene, thiophene, and thiophenol