Complexity factors

Typical complexity factors for the major process units in a refinery:

Unit Factor
Atmospheric distillation 1.0
Vacuum distillation 2.0
Vacuum flash 1.0
Thermal cracking 3.0
Visbreaking 2.0
Coking 5.5
Calcining 108
Asphalt 1.5
Lubes 60.0
FCC (50% conversion) 5.0
FCC (60% conversion) 6.0
Hydrocracking 6.0
Reforming 5.0
Isomerization 3.0
Alkylation 11.0
Polymerization 9.0
Oxygenates 10.0
Aromatics 20.0
Hydrorefining 3.0
Hydrotreating 1.7
Hydrogen production (MCFD) 1.0
Hydrogen recovery (MCFD) 1.0
Sulfur (Ton/day) 85.0

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