Leakages in the regenerator and settler
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What is the normal level of catalyst loss in a catalytic device? What is the loss ratio through the regenerator and settler? Why?
Below 0.2: Excellent; 0.2–0.4: Normal; 0.4–0.5: Acceptable; Above 0.5: Failed
Thank you, you’re amazing! Could you share what the ratio is?
I’m not really sure what the proportion is; once the catalyst in the reactor cokes, its particles become larger, and almost all of them can be recovered by the cyclone. The cyclone used in the reactor is also single-stage, and I don’t have any data on the amount of catalyst that is lost from the reactor.
If the solid content of your slurry is no higher than 6 g/l, then there is no leakage of the material; if it exceeds this level, there is mild leakage, and when it reaches 20 g/l, it constitutes severe leakage
The solid content of our slurry is less than 2.5, but the ash content is high. What could be the reason?
A high ash content indicates that most of the solids in the slurry are catalysts; however, a solid content of less than 2.5 suggests that there is no severe loss of catalyst. If there is also catalyst loss in the regenerator, it may be caused by damage to the catalyst itself, and this can be analyzed through the catalyst itself. If there is no catalyst loss in the regenerator, it might be due to poor cyclone operation in the settler, or inadequate atomization of the feedstock, resulting in insufficient contact between the feedstock and the catalyst, with some catalyst remaining uncontacted with the feedstock oil.
The fixed-content analysis was done incorrectly. Solid content is usually determined by centrifugation; if there are objections, mechanical mixing methods can be used, while the most undisputed analysis method is ash content.