Abstract: During the maintenance period in 2023, a domestic pre-hydrotreating unit utilized the presulfurized catalyst FH-40A. The loading and commercial use effects of the new pre-hydrotreating catalyst are comprehensively analyzed. The commercial application results show that the pre sulfurized catalyst FH-40A has advantages such as simplifying the start-up steps, shortening the start-up time, and reducing environmental pollution. Compared with the oxidation type pre-hydrotreating catalyst, it can save 40 hours of start-up time. During the start-up process, the concentration of hydrogen sulfide in the circulating hydrogen detected remained at an ideal level. After 6 months of operation, the catalyst exhibited stable and excellent catalytic performance.

Key words: catalytic reforming, pre-hydrogtreating, catalyst, presulfurized