Desulfurization and contaminant reduction of fuel oil

A system for desulfurization and contaminant reduction of a fuel oil, the fuel oil being contaminated by a sulfur containing compound and a contaminant, the system comprising:

• a first container designed for mixing the fuel oil with a first catalyst, the first catalyst including ozone O3 and poly-hydroxides OH—OH—OH repeated in a chain, to:
• oxidize the sulfur containing compound in the fuel oil to obtain one or more of the following:
• a sulfoxide and a sulfone;
• and
• oxidize the contaminant in the fuel oil to obtain an oxide of the contaminant, thereby forming a first mixture, wherein the contaminant is a sulfur-free substance;
• a second container designed for mixing the first mixture with a second catalyst and a third catalyst to extract a sulfur and an oxygen from the sulfoxide and the sulfone, thereby obtaining a second mixture;
• a vapor recovery unit designed for separating the second catalyst from the second mixture to obtain a third mixture;
• and
• a mechanical separator designed for separating, from the third mixture, the third catalyst, the sulfur, and the oxide of the contaminant to obtain a purified fuel oil.