Investigation of the promotion effect on the sulfide sulfur mobility and on the catalytic activity of hydrotreating Co/Mo/Al2O3 catalysts using35S

Abstract

Using S the effect of sulfur in Co/Mo/A12O3 catalysts on catalytic activity has been studied. A linear dependency between the amount of sulfur capable of participating in the formation of H2S and the catalytic activity has been established. It has been shown that with increasing the Co content, the overall amount of sulfide sulfur in the catalyst changes negligibly, while the amount of mobile sulfur increases linearly. It has been found that the promoter effects on the two groups of active sites that determine the sulfide sulfur mobility are different.