Effect of terminator on the temperature of the riser reactor
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Why can the use of a terminator cause an increase in the temperature of a riser reactor? With the exit temperature of the riser remaining constant, the temperature at the lower part of the riser increases, and this temperature rises as the injection volume increases
A terminator actually functions by cooling down the catalyst, reducing its temperature below that of the reaction; this causes the reaction to stop. The use of a terminator allows for an increase in the catalyst circulation rate without causing the temperature at the outlet of the lift tube to rise too much. As a result, the temperature above the feed nozzle in the middle section of the lift tube increases, thereby enhancing the depth of the reaction. As the amount of material injected increases, the catalyst circulation rate also needs to be increased in order to maintain the reaction temperature. However, it is also not advisable to inject an excessive amount, as this could lead to interruptions in catalyst circulation and cause fluctuations in production