ANTIOXIDANTS, DEHAZERS AND METAL DEACTIVATORS DIESEL FUEL ADDITIVES BASIC INFORMATION


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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