Catalyst loading
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When the reactor is overhauled and the catalyst is replaced, what should the internal temperature level in the reactor be, ideally not exceeding a certain threshold? What are the limits for hydrogen sulfide and ammonia? ?
Because I don’t know what catalyst your device is. When removing catalyst from a hydrogenation unit, it is generally required that the catalyst’s temperature not exceed 50°C; if time is of the essence, nitrogen blanketing must be applied during the catalyst removal process. 2. The lower the hydrogen sulfide level, the better; it should be below 5 PPm. 3. The indicators for ammonia are not very clear. Additionally, in the case of hydrogenation catalysts or medium-temperature shift catalysts, care must be taken to prevent the catalyst from catching fire during catalyst removal. (It can be packaged in a sealed container, isolated with dry ice or nitrogen); the rate at which the agent is removed should be moderate, otherwise it can also lead to an increase in temperature that triggers spontaneous combustion.
I have an anthracene oil hydrogenation unit here
Naphtha hydrogenation catalysts are generally not regenerated and must be disposed of in an environmentally safe manner. It’s better to keep the stripping temperature low.
Replace it thoroughly with nitrogen, keep the reactor at a slight positive pressure, and work inside wearing a long-tube respirator. To remove the catalyst, it must be properly protected using dry ice or nitrogen. Where is anthracene oil hydrogenation done? Baoshun?
The methanol cracking catalyst I replaced earlier required a temperature of below 50°C.