Heavy Fuel Oil (HFO) is a residual fuel incurred during the distillation of crude oil. It is primarily used to generate motion and/or heat that have a particularly high viscosity and density. Mainly used in industrial boilers and other direct source heating applications. It is also used as a principal fuel in marine applications and large diesel engines. Generally HFO typically includes bitumen, asphaltenes and long chain polycyclic aromatic hydrocarbons.
