Different types of Mazut-100
The main difference between the different types of Mazut-100 is the content of sulphur. The grades are represented by these sulfuric levels:
”Very Low Sulphur” is mazut with a sulphur content of 0.5%
”Low Sulphur” is a mazut with a sulphur content of 0.5-1.0%
”Normal Sulphur” is a mazut with a sulphur content of 1.0-2.0%
”High Sulphur” is a mazut with a sulphur content of 2.0-3.5%
Very Low Sulfur mazut is generally made from the lowest sulfur crude feedstocks. It has a very limited volume to be exported because:
The number of producers in Russia is limited. Refineries which produce this are generally owned by the largest domestic oil companies, such as Lukoil and Rosneft, etc.
In Russia and the CIS a minimum of 50% from the total produced volume is sold only to domestic consumers in Russia and the CIS.
Most of the remainder amount is reserved by state quotas for state controlled companies abroad.
The remaining volume available for export is sold according to state quotas, via state auctions, accessible only to Russian domestic companies.
Low to high sulfur mazut is available from Russia and other CIS countries (Kazakhstan, Azerbaijan, Turkmenistan). The technical specifications are represented in the same way, according to the Russian GOST standard 10585-99. The Russian origin mazut demands higher prices.
Properties Of Mazut-100
Mazut is the residue from distillation of gasoline, ligroine, kerosene, and diesel oil fractions from petroleum. Mazut may be used as boiler fuel oil, in the preparation of distillate and residual lubricating oils, in cracking or hydrogenation processes for the manufacture of motor fuel (gasoline or diesel oil), and in the production of bitumen and coke, depending on its chemical composition and properties.

The properties of mazut are as follows:
Density, 890-1,000 kg/m3 at 20°C;
Heat of Combustion, 38-42 megajoules per kg(9,100-10,000 kcal/kg);
Relative Viscosity, 5°-15° at 50°C;
Surface Tension, 0.03-0.04 joules per sq m (30-40 erg/cm2) at40°C);
Heat of Evaporation, 170-210 kilojoules per kg (40-50 kcal/kg);
Sulfur Content, 0.8-3.5 percent;
Resin Content, up to 60 percent;
Ash Content, 0.1-0.5 percent.
The mazut used for fuel in gas turbines must have the lowest ash content (the ash must contain no more than 0.001 percent vanadium and 0.0005 percent sodium, which are particularly harmful elements in terms of corrosion).
Kinds Of Mazut
Fuel Oil CST 180
Fuel Oil CST 380
Low Sulphur Fuel Oil
Low Viscosity Fuel Oil
Specifications& Characteristics
FUEL OIL CST-180 SPECIFICATIONS
Viscosity kinematic @ 50 ° C (max) 180 230
Pour point (max) ° C 5.0 15.0
Flash point (min) ° C 63 63
Sulphur Total (max) %mass 3.0 3.0
Carbon Residue Conradson (max)%mass 13 13
Ash (max) %mass 0.05 0.05
Water & sediment (max) %vol 0.5 0.5
Colorific value higher (min) MJ/kg 42.2 42.2
CST 280 and CST 380
Density @ 15 ° C (max) kg /L 0.97 0.99
Viscosity kinematic @ 50 ° C (max) 280 380
Pour point (max) ° C 24 32
Flash point (min) ° C 65 65
Sulphur Total (max) %mass 3.5 3.5
Carbon Residue Conradson (max)%mass 15 20
Ash (max) %mass 0.15 0.15
Water & sediment (max) %vol 1.0 1.0
Colorific value higher (min) MJ/kg 41.7 41.7