## 3 Results
### Commercial Distillation Test Results
The data in Table 3 indicates that the processing of 39 t/h H-Oil VGO blend resulted in 3.4 t/h higher amount of produced diesel fraction from the FCC feed hydrotreating section. This equals to 8.7 wt.% of the H-Oil VGO processed in the FCCPT stabilization column. Table 4 presents data for the characteristics of FCCPT feed, HTVGO, and diesel, and those of the H-Oil heavy distillates measured by the ASTM D 1160 and the ASTM D 7169 methods for Case 2. It is worth mentioning here that the characteristics of the FCCPT feed, HTVGO, and diesel for Case 1 were identical with those of Case 2. The data in Table 4 indicates again a very big difference in the content of diesel fraction (boiling \(\leq\) 360 \({}^{\circ}\)C) in the H-Oil VGO blend, that is additionally processed in the FCCPT stabilization column, measured by ASTM D 7169 (9.6 wt.%) and by the ASTM D 1160 (1.7 vol.%). If one takes a look at the data in Table 3, it can be seen that the additional amount of diesel separated from the FCCPT stabilization column, that comes from the H-Oil VGO blend, presents 8.7 wt.% of the H-Oil VGO processed in the column. This value is very close to that measured by the ASTM D 7169 and too far from the value reported by the ASTM D 1160 method. It should be pointed out here that the characteristics of the diesel fraction separated from the FCCPT stabilization column and the following stripping column were the same for both studied cases. This means that the increased quantity of produced diesel fraction from the FCCPT stabilization column and the following stripping column comes from the increased content of diesel fraction in the H-Oil VGO blend. Table 5 presents data of FCC section operating conditions and FCC yields registered for Case 1, and Case 2 studied in this work. This data shows that the separation of diesel fraction from the H-Oil VGO not only increases the amount of diesel produced in the refinery, but also enhances the conversion in the FCC unit, at the expense of lowering the light cycle oil (LCO) yield. By doing an economical evaluation using the LP (linear programming) model of the LNB refinery, the margin improvement from the separation of diesel fraction from the H-Oil VGO amounts to about 7 MM USD/year. \begin{table}
\begin{tabular}{l c c c c c} \hline \hline  & \multicolumn{2}{c}{**Without H-Oil VGO**} & \multicolumn{2}{c}{**With H-Oil VGO**} & \multicolumn{2}{c}{**\% of \(\Delta\) Diesel**} \\
**FCCPT Feed Component** & \multicolumn{2}{c}{**Processing in the FCCPT**} & \multicolumn{2}{c}{**Processing in the FCCPT**} & \multicolumn{2}{c}{**Processing in the FCCPT**} & \multicolumn{2}{c}{**\(\Delta\) Diesel**} & \multicolumn{2}{c}{**Fraction of H-Oil VGO**} \\
**Flow Rate** & \multicolumn{2}{c}{**Stabilization Column**} & \multicolumn{2}{c}{**Stabilization Column**} & \multicolumn{2}{c}{**Stabilization Column**} & \multicolumn{2}{c}{**Fraction, t/h**} & \multicolumn{2}{c}{**Processed in the FCCPT**} \\  & \multicolumn{2}{c}{**(Case 1)**} & \multicolumn{2}{c}{**(Case 2)**} & & & \\ \hline FCCPT VGO feed rate, t/h & 160 & & 160 & & & \\ H-Oil VGO entering in FCCPT & & & 39 & & & \\ stabilization column, t/h & 0.85 & & 0.83 & & & \\ FCCPT Products & t/h & yields, wt.% & t/h & yields, wt.% & & \\ FCCPT gas flow rate, t/h & 1.1 & 0.7 & 1.2 & 0.7 & & \\ FCCPT H2S flow rate, t/h & 3.8 & 2.4 & 3.7 & 2.3 & & \\ FCCPT naphta flow rate, t/h & 2.1 & 1.3 & 1.8 & 1.2 & & \\ FCCPT diesel flow rate, t/h & 16.6 & 10.4 & 20.0 & 12.5 & 3.4 & 8.7 \\ Hydrotreated VGO flow rate, t/h & 137.0 & 85.6 & 172.9 & & & \\ Losses, t/h & 0.2 & 0.1 & 0.2 & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Quantity of feeds and products of the FCCPT (FCC feed pretreater (hydrotreating section) obtained during the commercial test without (Case 1) and with (Case 2) processing of H-Oil heavy distillates in the FCC feed hydrotreater stabilization column.