Properties of Heavy Fuel Oil (HFO)

The quality of the heavy fuel oil is largely determined by the crude oil grade and the refining process applied. This is the reason why heavy fuel oil of the same viscosity may differ considerably in quality from one bunker place to another. Heavy fuel oil normally is a mixture of residue oils and distillates. The components of the mixture often come from state of the art refining process such as visbreaker of catalytic cracking plant. These process may have a negative effect on the stability of the fuel and on its ignition and combustion properties. In this essence these factors also influence the heavy fuel oil treatment and the operating results of the engine.

S/N	Specification	Method	BPC limit
1	Density at 15°C Kg/L	ASTM D 1298	Max. 0.991
2	Viscosity at 50°C, cst	ASTM D 445	Max.180
3	Water & Sediment, % wt	ASTM D 1796	Max. 0.5
4	Total sediment Existent, %wt	IP 375	Max. 0.10
5	Sediment by Extraction, % wt.	ASTM D 473	Max. 0.10
6	Sulphur content, %wt	ASTM D 1552	Max. 3.5
7	Ash Content, %wt	ASTM D 482	Max. 0.10
8	V, ppm	IP 377	Max.50
9	Na, ppm	IP 288	Max. 16
10	Asphaltenes, %wt	IP 143	Max. 14
11	Flash Point, °C	ASTM D 93	Max. 60
12	Pour Point, °C	ASTM D 97	Max.24
13	Al, ppm	IP 377 mod	Max. 30
14	LHV, KJ/Kg	ASTM D 240	Min. 39000
15	Compatibility spot test	ASTM D 4740	Max. 2
16	Water by distillation, % Vol	ASTM D 95	Max. 0.50

 

 Chemical formula-C16H34+C10H7CH3

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