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.