Sulfur

Sulfur is found in refined petroleum products including diesel. This is because crude petroleum is mainly composed of hydrocarbon components, and other components including organic and inorganic sulfur-containing compounds. Sulfur is the third most-found element in crude petroleum after carbon and hydrogen. Crude petroleum with a high sulfur content is more complicated and more expensive to refine.

The presence of sulfur in diesel enhances metal corrosion in the engine, fuel system and after-treatment. In addition, it increases sulfur oxide emissions. For these reasons, the sulfur content in fuels, including diesel, is limited.

In Morocco, there is one diesel grade. From January 1, 2022, the maximum sulfur content in diesel has changed from 50 mg/kg to 10 mg/kg.

According to the SGS Wo