PETROLEUM PRODUCTS AND A REFINERY CONFIGURATION 99
Then blended Premium Gasoline will have the following specification:
SG@60
◦
F 0.7749
RVP 7.0 psia
50% ASTM vol distilled = 275
◦
F
60% ASTM vol distilled = 290
◦
F
95% ASTM vol distilled = 380
◦
F
Octane number research clear = 90
These meet the required specifications for the product.
(iv) Regular gasoline. It is proposed only to include the component breakdown for the
Regular Gasoline precursors here. The remainder of the blending recipe for the
product will follow that for the Premium grade. Thus the component breakdown
for regular Grade is as follows:
LSR Reformate Lt crack naptha
Temp Total
Comp
◦
F %vol BPCD %vol BPCD %vol BPCD BPCD
1 45–100 20 993.9 6 294 5 125.2 1,413.1
2 125 15 745.4 4 196 5 125.2 1,066.6
3 150 15 745.4 7 343 19 475.6 1,564.0
4 175 30 1,490.8 8 392 14 350.4 2,233.2
5 200 10 497 8 392 15 375.4 1,264.4
6 250 10 497 17 833 19 475.5 1,805.5
7 275 20 980 8 200.2 1,180.2
8 300 12 588 5 125.2 713.2
9 350 12 588 10 250.3 838.3
10 400 3 147 147
11 475 3 147 147
Total 4,969.5 100 4,900 100 2,503 12,372.5
Following the same calculation route as that for premium grade the TBP and ASTM
distillation curves are also given in Figure 2.7. The calculation for RVP shows the
blend requires an input of 0.36% vol C
4
to meet the RVP of 7 psia. Regular Grade
Gasoline therefore has the following specification:
SG@60
◦
F 0.7531
RVP 7 psia
50% ASTM vol distilled = 185
◦
F
60% ASTM vol distilled = 200
◦
F
95% ASTM vol distilled = 310
◦
F
Octane number research clear = 82.