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Having personally run a UOP design FCC and several Kellog design FCC’s I’d like to know what is different about the Exxon design compared to the other two. I know there are a lot of variations (ie rough cut cyclones, internal risers vs external) but from a operators perspective what are the major differences?
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Dear Spectorbass.
I was panel operator in a FCC Exxon design (Riser Extended), but I don’t know the UOP and Kellogg designs operations details. I think that the operation is very interesting, they’re many variables but in the unit that I operated the Riser temperature is the principal variable to be controlled, approx. 945ºF. The COT= 700ºF, Regenerator temp= 1340ºF, Pressure differential RX-RG= 1.5 psig. Pressure overhead of fractionator=18 psig, among others. Typically the conversion is 65 – 68%, production of; Olefins= 23 KBD and Naphtha= 60 KBD, vs. a charge of 100 KBD. The loss of Cat is approx. 3,5 tons per day, an addition of New Cat of 5,0 tons per day. I hope had helped you in your requirements. Best Regards…
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Hi,
Can you give the amount of catalyst loss as percentage of the total circulating catalyst or may be another ratio? I m interested to have an idea about catalyst loss in FCC.
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