D2 diesel fuel is the second
distillate of crude oil. Ultra-low sulfur grades of D2, such as
GOST 305-82, with a reduce sulfur content to a maximum of 0.02
percent and reduce sulfur pollution emissions.
Diesel fuel is often used in
diesel engines. Diesel engines or compression ignition engines,
rely on the temperature increase of compression, rather than on
spark plugs, to achieve reliable ignition timing and combustion
efficiency.
As a result of their inherently
higher compression ratio for a given power output, diesel engines
are more fuel efficient than spark ignition engines. Compared with
spark ignition automotive engines, diesel engines weigh more,
generate more vibration and produce greater particulate or soot
emissions. Diesel engines can also produce a particularly
carcinogenic type of hydrocarbon pollutant known as polycyclic
aromatic hydrocarbons (PAHs), which are generated during the diesel
combustion process.
The cetane index is a measure of
the autoignition quality of a diesel fuel, with higher numbers
meaning that the engine is easier to start in cold
weather.
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