 Especially when dealing with kerosene, the Merox process is usually more economical than using a catalytic hydrodesulfurization process for much the same purpose.Indeed, it is rarely (if ever) required to reduce the sulphur content of a straight-run kerosene to respect the sulphur specification of jet fuel as the specification is 3000 ppm and very few crude oils have a kerosene cut with a higher content of sulphur than this limit.UOP has developed many versions of the Merox process for various applications