Page 180 - Fluid Catalytic Cracking Handbook

152 Fluid Catalytic Cracking Handbook

Example 5-2
Conversion of Input and Output Streams to the Unit of Weight (Ib/hr)

„ , „ . 50,000bbl 1day 141.5 350.3 Ib
• Fresh Feed = — - — - - x - - x - • -- x - — —
day 24 hr (131.5 + 25.2) bbl
= 658,964 lb/hr

„, 3,000,000 SCF 1day 1mole 27.8 lbs ni« «,„,,.
» f^r\lrpir CTQG — _ ! _ ! _ ........ A. V , •* v . *„._„,„_ _^ ._.....,.._L..._, ..,.., ........u _.-_...-... ___ « | JvJ.O 1U/ 111
V _
-— Q 1 Sf\ x m/nr
v^UJVCI gas —*"
A.
"
day 24 hr 379.5 SCF 1mole
.™ .. 16,000,000 SCF Iday Imole 22.6 Ibs
• FCC tail gas = — - - - - x - ^x - x -
day 24 hr 379.5 SCF Imole
= 39,701 Ib/hr
The amount of inerts in the FCC tail gas is:

16,000,OOOSCF 1day ___ „ Imole 281bs 3,542lb/hr
KT
• N 2 = — - - - - x - i- x 0.072 x - x - = 3,542 Ib/hr
day 24 hr 379.5 SCF Imole
„ 16,000,OOOSCF An - t 1day 1mole 441bs ,,»«,,„
!
. CO 2 = — - - - x 0.021 x - ^-x - - x - = 1,623 Ib/hr
day 24 hr 379.5 SCF Imole
• Inert-free FCC tail gas = 39,701 - (3,542 + 1,623) = 34,537 Ib/hr

141.5
. LpG= H.565bbl x lday x X35031b =
day 24 hr (131.5 + 123.5) bbl

„ 30,000bbl day 141.5 350.31b
r
• Gasoline = — - - x - -x - x -
day 24 hr (131.5 + 58.5) bbl
= 326, 102 Ib/hr

141.5 f
day 24hr (131.5 + 21.5) bbl

3,000bbl 1day 141.5 350.31b ., «--,.,,
= — - x - i-x - x -- = 46,2731b/hr
day 24 hr (131.5 + 2.4) bbl