Introduce hydrogen gas to the hydrogenation unit
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I would like to ask why, for the airtightness testing of hydrogen introduction in a diesel hydrotreating unit, it is required that the maximum temperature of the catalyst bed not exceed 80°C?
After achieving airtightness, pre-vulcanization takes place. As the original poster mentioned, before introducing hydrogen gas during pre-vulcanization, the temperature of the catalyst bed should not exceed 150°C, in order to prevent the heavy-metal catalysts from undergoing hydrogen reduction.
Agree with the person above! We keep it at no more than 170; a lower value is better.
Agreeing to raise the temperature to the upper level – it is generally 150°C, mainly to prevent hydrogen reduction. A temperature of 80°C is too low, and it violates the safety procedures for operating the reactor; when the temperature at any point in the reactor falls below 135°C, the system pressure must not exceed one-third of the total pressure.
80 degrees is too low; we keep it around 170 degrees, mainly to prevent the catalyst from being reduced by hydrogen and becoming inactive
Our temperature is above 145 degrees, before vulcanization
No, I read in the operating procedures that before introducing hydrogen gas under airtight conditions, the temperature at the highest point of the catalyst bed should not exceed 80℃