70
Kerosene yield wt%
AAD = 0.98 wt%
60
Mix 1 Pred. (VGO 80% + WCO 20%)
50
Mix 3 Pred. (VGO 80% + WLO 10% + WCO 10%) Mix 1 act. (VGO 80% + WCO 20%) Mix 3 act. (VGO 80% + WLO 10% + WCO 10%) Mix 2 Pred. (VGO 80% + WLO 20%) Mix 4 Pred. (VGO 70% + WLO 20% + WCO 10%) Mix 2 act. (VGO 80% + WLO 20%) Mix 4 act. (VGO 70% + WLO 20% + WCO 10%)
40
30
20
10
0
370
380
390
400
410
420
430
440
450
Temp. (˚C)
Figure 4 Predicted and actual kerosene yield in weight per cent
calculated overall AADs for each studied product yield and stream property value. On the other hand, Figure 4 illustrates kerosene yield distribution in weight per cent for both predicted values in dash lines and actual values in solid lines. This figure shows a high deviation between actual and predicted values with respect to yield deviation val- ues, resulting in a high AAD value of 0.98 wt%. In addi- tion, Figure 5 , which illustrates diesel yield distribution in weight per cent for both predicted values in dash lines and actual values in solid lines, shows a high deviation between actual and predicted values, resulting in a high AAD value of 0.71 wt%.
On the other hand, the total middle distillate yield (kero- sene yield weight per cent + diesel yield weight per cent) shows good deviation values with an accepted AAD value of 0.0.07 wt%. This is observed in Figure 6 , which illus- trates middle distillates yield distribution in weight per cent for both predicted values in dash lines and actual values in solid lines. There seems to be a significant difference between the distillation column temperature profile used in the simulation case, resulting in different boiling ranges of kerosene and diesel. This difference in boiling ranges between kerosene and diesel in simulation cases and actual cases cannot be solved, as kerosene and diesel boiling ranges are not
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