Issues regarding the furnace exit temperature and the temperature of the first reactor bed in the hydrogenation of a mixture of coker gasoline and straight-run diesel
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This post was last edited by JumpingWind001 on 2018-11-14 at 15:38. Issues regarding the mixing and hydrogenation of coker gasoline and straight-run diesel, as well as the furnace outlet temperature and the temperature of the first reactor bed. Help: In my previous setup, there was almost no difference in temperature between the outlet temperature of the furnace and the temperature at the top layer of the first bed in the reactor. Now, after performing a top stripping operation and replacing some of the catalyst, the temperature difference has reached up to 9°C. I don’t know why.
The absence of a temperature difference at the top indicates no reaction; the catalyst may be ineffective. The appearance of a temperature difference after removing the liquid from the top and replacing the catalyst shows that the removal of the liquid was done correctly； Of course, this is on the assumption that other reaction conditions remain unchanged.
I’m not sure whether by \"no temperature difference\" you mean that the new catalyst has no such difference, or that it loses this characteristic after being used for some time. If it’s the latter, then there is gum-like substance covering the catalyst, which hinders the reaction and leads to a decrease in its activity. After turning the head, a new agent is used and its activity increases; the saturation of olefins releases heat, resulting in an increase in temperature
Higher catalyst activity leads to greater reaction depth and higher temperatures; there is a temperature rise of around 20° in the two lower layers of our reactor
The activity of the protective agent should increase from top to bottom, from none to present, and from low to high