Then blended premium gasoline will have the following properties:
SG at 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 shown in Table 41.
Following the same calculation route as that for premium grade, the TBP and
ASTM distillation curves are also given in Fig. 12. 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 properties:
SG at 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
Table 39 Gasoline RVP blend factors
Comp
Mid
Bpt
#/
gal
Mol
Wt
VP at 100
F psia % vol
Wt
factor
Mol
factor
1
75
5.96
72
22
4.77
28.43
0.395
2
115
6.03
73
11
3.61
21.77
0.298
3
135
6.09
75
6.2
6.19
37.70
0.503
4
155
6.17
81
5.0
8.27
51.03
0.630
5
185
6.25
90
2.5
7.41
46.31
0.515
6
225
6.39
100
}
8.61
55.02
0.550
7
260
6.49
110
}
14.11
91.57
0.832
8
285
6.56
119
}1.8
16.79
110.14
1.08
9
315
6.64
128
}
17.06
113.28
0.885
10
375
6.83
148
}
10.22
69.80
0.471
11
420
6.95
162
}
2.96
20.57
0.127
Total
6.45
103
100.00 645.62
6.287
Petroleum Products and a Refinery Configuration
113