Sulfur % wt = 2.18
lbs feed per CD = 5,425 Â 42 Â 7.309 = 1,665,356
lbs/CD sulfur in feed = 1,665,356 Â 0.0218 = 36,305 lbs
Sulfur removed at 85.0 % = 30,859 lbs/CD
Sulfur in finished product = 5,446 lbs/CD
Hydrogen makeup required to make H 2 S=
30,859
32 = 964 moles/CD
Hydrogen makeup required for cracking reactions = 1,079 mol/CD (Licensor)
Hydrogen purge and solution losses = 204 mol/CD (Licensor)
Total hydrogen makeup ¼ 2,247 moles=CD
¼ 851,613 Scf=CD
Reformer gas as makeup ¼ 851,613 Ä 0:92
¼ 925,666 Scf=CD
100
90
1.0
80
70
60
% Mid Volume
50
40
30
20
10
0
2.0
3.0
4.0
5.0
% Wt sulfur
6.0
7.0
8.0
9.0
Fig. 11 Thermal cracker
effluent sulfur curve
102
D.S.J. Jones and S.A. Treese