How can the increase in reaction temperature be explained by the decrease in settler pressure in a catalytic reactor? ?

Theoretically, there is a decrease in the pressure of the reaction settler and an increase in the reaction temperature. However, in the actual operation of the unit, the pressure in the settler is controlled by the backflow of air from the compressor and its rotational speed, while the reaction temperature is adjusted by the opening degree of the regenerative slide valve. As a result, the pressure in the settler decreases, the pressure difference between the two vessels increases, the driving force in the regeneration circuit rises, and the catalyst circulation rate increases, leading to an increase in the reaction temperature. However, since the reaction temperature is controlled at a constant value, the regeneration slide valve is appropriately reduced to lower the catalyst circulation rate, thereby keeping the reaction temperature unchanged. All of the above is based on the assumption that all other conditions remain unchanged.

It is mainly the increase in catalyst circulation rate that causes the reaction temperature to rise.

We still need to look at the main contradiction here. If, for some reason, the reaction pressure decreases, other factors will also change as a result. According to the laws of conservation of energy and matter, the reaction temperature will ultimately increase, but other factors will also adjust appropriately to reach a new state of equilibrium.

It’s explained very clearly, thank you so much~

The reaction pressure is controlled by adjusting the speed of the compressor, while the reaction temperature is controlled by adjusting the opening degree of the slide valve; both are regulated separately