A problem with two-stage regeneration in catalytic cracking
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For the two-stage regeneration unit, what is the maximum value of the CO/CO2 ratio in the flue gas composition of the first regenerator? Under what operating conditions can this maximum value be achieved? Is there also CO in the flue gas of the second regenerator? How is the charcoal ratio between one repetition and two repetitions determined? Thank you all
There are several types of two-stage regeneration; I’m not sure which one you mean? It would be better to be more specific.
This post was last edited by liaifeng on 2011-9-16 21:10. 1. Generally, two-stage regeneration systems use partial regeneration in the first stage and full regeneration in the second stage. Stage 1 regeneration mainly involves burning hydrogen, while stage 2 regeneration mainly involves burning carbon. Generally, the burning ratio for the first and second stages is around 75:25. 2. As for the CO/CO2 ratio you mentioned, it can be understood as an indicator of the degree of charring; when charring occurs under conditions of low oxygen, this value should be relatively high. It is clear from the burning ratio that 100% burning is impossible under any circumstances; therefore, CO from the second-stage regeneration must exist. 3. The determination of the burning ratio should be based on the actual conditions of the device; there is no fixed value!