Home › Forums › CatCracking › FCC Process › Catalyst circulation rate in an FCC
This topic contains 7 replies, has 2 voices, and was last updated by Anonymous 10 years, 8 months ago.
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AuthorPosts
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April 29, 2008 at 2:57 am #3667
Can anyone tell me the catalyst circulation rate (tons per day) in a typical FCC unit … with fresh feed rate of say 50,000 BSD? Or some other size?
I just need to have a plus or minus 15% accurate number. Assume the FCC is a modern one using riser cracking.
I would really appreciate it.
Milt Beychok -
January 5, 2009 at 8:26 pm #6371
AnonymousThe one i worked on was a 5oMBPD unit Kelloge and circulated about 28 TPM
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March 16, 2009 at 3:41 am #6198
AnonymousYes . My experience on FCC units also provide a similar figure on cat circulation rate. (when extrapolated – it is around 30 TPM for a 50 MPBD cracker).
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March 31, 2009 at 3:24 am #6178
AnonymousHi,
I have operated 57000 B/Sd RFCC with cat Circ rate of around 35 T/min, for your info. -
September 30, 2009 at 9:16 pm #5983
AnonymousFor a 50 MBSD at a Cat-to-Oil ratio of 6 the Cat circ would be ~32.5 tpm
for a Cat-to-oil ratio of 7 the cat circ would be ~38 tpma good modern FCC would be in the 6-7 Cat-to-Oil range
If you were indeed lucky to have a unit with a
Cat-to-Oil of 8 the Cat circ would be ~43.75 tpmKen Peccatiello
Ken@PeccatielloEngineering.com
Ken@CatCracking.com -
June 27, 2010 at 2:55 am #5563
Anonymoushello. dear sir ,If you can send me your e-mail.or If you want ,we can speak here.I want to know something about rfcc unit.i would appreciate it
may mail :mehrdad_khanbolooki@yahoo.com [quote]ORIGINAL: GuestHi,
I have operated 57000 B/Sd RFCC with cat Circ rate of around 35 T/min, for your info.
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June 27, 2010 at 3:09 am #5562
Anonymoushi .sir i think that,if you operat new fcc design, best c/o (ratio) is 5 or 6.I think that if you test this ratio,you can take best result***thank you
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October 15, 2011 at 2:53 am #4886
AnonymousI agree with the estimations made by our members. I am just adding some more information to this. there are several variables influence the cat cir rate. one of them is severity of operation or conversion.
Cat cir rate for a 50,000 BPSD FCC is
1. @30TPM for a moderate conversion level of 55 to 60%
2. approx 40 T/min for a conversion level of 70%
3. approx 50 TPM for a conversion levek of 80%
the above data is applicable for a riser FCC. If UOPs latest Rx cat tecnology riser is used, cat cir rates are much higher, arround in the range of 80 TPM for a 50000BPSD FCCU at 80% conversion level.
regards,
Murthy -
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