Isomerate
ISOM
LSR
CDU & VDU
NHTU
HTLN2
Reformate
CCRU
HSR
C LPG
HTLN1
ETBE
HTH naphtha
Gasoline 95
HTHN2
Kero distil
C C
Gasoline 93
SR d iesel
DHT naphtha DHT k ero DHT d ist
Kerosene
HDS
LVGO
Diesel
HVGO Vac r esid
HF Oil
Blender
NAPHTL NAPHTH
HC ligh t naphtha HC hea vy naphtha HC k ero HC d iesel
HCU
Asphalte
Coker HN LCGO HCGO
DCU
Ind. diesel
Coke
CO
Blue H unit
H
e-SAF
H
e-fuel
e- d iesel
H to process units
Figure 4 Optional case. Hybrid refinery configuration scheme
The captured (or ‘sequestrated’) CO 2 is subsequently used inside the refinery as feedstock for the production of synthetic fuels. The amount of CO 2 generated in the HPU is: HPU unit capacity 95,625 TPA CO 2 generated (CO 2 HPU): 900,000 TPA All the CO 2 of the HPU will be considered as sequestrated. Green hydrogen generation The SMR equipped with CO 2 capture produces blue hydrogen for use in refinery processes such as hydrotreaters and the hydrocracking unit. Additional hydrogen capacity is needed to ensure sufficient feedstock for the synthetic fuels unit. A water electrolyser is included with the
following criteria used to determine the capacity: • Total hydrogen required in the conventional hydroprocessing units, plus the hydrogen required in the e-SAF and e-diesel units, minus the hydrogen reduction resulting from the change to substitute a percentage of synthetic fuels in place of regular kerosene and diesel. • The green hydrogen unit is sized once the synthetic fuels are sized for the total consumption of the CO 2 previously captured. Synthetic fuels production The combination of blue and green hydrogen plus the captured carbon monoxide is used as feedstock to produce synthetic e-SAF and e-diesel (see Figure 4 ).
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