Heavy, thick substance, such as No.6 oil, left over from the distillation of petroleum.
Very heavy fuel oils produced from the residue from the fractional distillation process rather than from the distilled fractions.
Residual fuel oil is used for the production of electric power, space heating, vessel bunkering, and various industrial purposes.
heavy fuel oil produced from the residue in the fractional distillation process rather than from the distilled fractions.
Heavy fuel oils produced from the non-volatile residue from the fractional distillation process. Heavy oils that are "leftovers" from various refining processes. Heavy black oils used in marine boilers and in heating plants.
A low-quality oil left over after the refining process has converted the crude oil to higher-value refined products. The residual oil is also referred to as No. 6 oil. Large industrial customers generally use it. It is less expensive than distillate fuel oil and generally has higher emissions of air pollutants than refined oil products or natural gas. [ mazout lourd
The heavier oils that remain after the distillate fuel oils and lighter hydrocarbons are distilled away in refinery operations and that conform to ASTM Specifications D396 and D975. Included are No. 5, a residual fuel oil of medium viscosity; Navy Special, for use in steam-powered vessels in government service and in shore power plants; and No. 6, which includes Bunker C fuel oil and is used for commercial and industrial heating, electricity generation, and to power ships. Imports of residual fuel oil include imported crude oil burned as fuel.