What are the requirements for sulfurized oil in the catalyst presulfidation of diesel hydrogenation units? ? ? ?
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What are the requirements for sulfurized oil in the catalyst presulfidation of diesel hydrogenation units? ? ? ?
Straight-run oil with low impurity content and low olefin content!
The manufacturer needs to specify these requirements; there are specifications for the olefin content, the process, and the bromine value
We used the straight-run diesel produced by our company’s vacuum distillation process at that time. . .
For straight-run diesel, oil from the first and second distillation stages is generally used. The required levels are sulfur at 300 PPM, nitrogen at 150 PPM, and moisture at 0.3% – all of these values should be below the specified limits; these are approximate figures. The key advantage of this type of oil is that it does not release heat during the initial stages. Unsaturated hydrocarbons may start to react at around 180°C, whereas straight-run oil can reach around 260°C before reacting. This property provides safety protection for the catalyst during the pre-sulfurization process
1. The olefin content should not be too high. 2. The sulfur content should not be too low. 3. It is best to use atmospheric-pressure diesel
To use Toyoji, the amount of olefins needs to be low