Why does the reactor temperature rise sharply when a large amount of coker gasoline is mixed into the feed of the diesel hydrogenation unit?
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What are the main components of coker gasoline? What reaction caused the sharp increase in temperature?
Mainly, the olefin content in coker gasoline is very high; the saturation of olefins is an exothermic reaction, so the temperature rise is relatively high.
From a thermodynamic perspective, hydrogenation reactions are exothermic reactions. The hydrogenation refining process primarily involves hydrogenation saturation, hydrodesulfurization, as well as the removal of nitrogen, oxygen, and metals. Coker gasoline contains high levels of unsaturated hydrocarbons, sulfur, nitrogen, oxygen, and metals; therefore, when hydrogenation reactions take place in large quantities, a significant amount of heat is released, causing the reaction temperature to rise
It is mainly exothermic due to the saturation of olefins, with little exothermic reaction associated with the removal of sulfur, nitrogen, and oxygen