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Hydroprocessing treatments are used by refiners to make transportation fuels such as gasoline, diesel and jet fuel from crude oil. These steps are performed to ensure that the emissions from the fuels after they are burnt in an engine meet today’s environmental requirements.

Hydroprocessing is what happens when hydrogen is added to petroleum. The two types of treatment it entails are hydrotreating and hydrocracking.  Hydrotreating is a chemical process in which impurities in petroleum such as sulphur, nitrogen, and metals are removed and replaced with hydrogen.  Removing impurities gives cleaner burning, better performing fuels.

Hydrocracking occurs when large, complex petroleum molecules are broken into smaller, more useful molecules using heat and then stabilized by adding hydrogen. Hydrocracking produces lighter, more easily burnt fuels.