What Is The Purpose of Antioxidants,
Dehazers and Metal Deactivators?
These additives are primarily used to
improve fuel storage stability. Initially, they do not directly
influence a fuel’s engine performance at all.
However, they prevent fuel
deterioration over long periods and thus ensure a fuel’s
filterability is good and deposits are minimal after extended vehicle
downtimes.
They were especially necessary in fuel
components from thermal and catalytic cracking plants because fuel
components from these plants had higher contents of unstable
hydrocarbons. Antioxidants prevent oxidation and polymerization.
In part, dehazers are required to
facilitate rapid settling of finely dissolved water particles. Metal
deactivators prevent catalytic effects of metals on fuel ageing.
Now more advanced, the hydrogenation of
diesel fuel (hydrocracking, desulfurization, limitation of
polynuclear aromatics) has caused these kinds of additives to lose
their importance.
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