Selection of the pre-sulfiding endpoint temperature for hydrogenation units
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The sulfiding agent used in the naphtha hydrogenation unit at our plant is dimethyldisulfide, and the sulfiding completion temperature is 290℃； The sulfiding agent used in the diesel hydrogenation unit is carbon disulfide, with an end temperature of 320°C. Why? What’s the difference?
This is determined by the catalyst, not by the process or vulcanizing agent
Catalysts have different selectivities for temperature
Catalyst compositions vary among different manufacturers, which results in differences in the composition of the sulfurized oil as well as in the temperature.
The main factor is determined by the difference in the active components of the catalyst
This is mainly due to the different components of the catalyst.