Terminator for catalytic devices
Thread Content
It is understood that the terminator used in catalytic devices has been discontinued. Is your device still using it? What is the amount used, and what determines this amount?
Our plant’s old unit once used a terminator (crude gasoline), which was injected at the bottom of the riser in an amount equal to 10% of the processing volume, aimed at reducing olefins at that time. The new device has been moved to the upper part of the lift pipe; a terminator (acidic water) has been added, and it can be switched with crude gasoline. However, it has not been put into use yet. The terminator (crude gasoline) is now used only before injecting the feedstock at startup, in order to raise the temperature of the settler, which helps to increase the speed of the compressor; it is turned off after the feedstock is injected. The effectiveness of the terminator injection depends on the location, amount injected, and type of medium; information on these factors can be found online.
Medium: deoxygenated water; dosage: 5%-10%, controlled based on the temperature at the outlet of the lift pipe
Do we use heavy gasoline here, and oxygen-free water to cool down and prevent thermal cracking reactions?
Here we use heavy gasoline or quench water, and sometimes light contaminated oil as well. Prevent over-cracking
We usually use coarse gasoline; we stop using it when reprocessing lightly contaminated oil
We have crude gasoline, acidic water, and light contaminated oil as terminators; usually acidic water and contaminated oil are used for reprocessing, while light contaminated oil is used instead, mainly to adjust the product specifications.