Sulfex is a novel low-temperature, low-pressure process designed to remove sulfur from light distillates such as naphtha, kerosene, diesel, and gasoline, reducing sulfur content to less than 10 ppm without significantly affecting vital fuel properties. Unlike conventional hydro-desulfurization, Sulfex uses hydrogen peroxide instead of hydrogen, avoiding the severity of high-pressure hydrogen environments and associated safety risks.
The Sulfex process removes sulfur through a controlled oxidation and sorption process. The feed is gently preheated to the optimal reaction temperature, and sulfur compounds are oxidized using a proprietary catalyst–oxidant system. The oxidized sulfur species are then selectively removed through multi-stage sorption. Reagents and sorbents are recovered and recycled, minimizing waste. Laboratory tests have shown that feedstocks containing up to 5000 ppm sulfur can be reduced to less than 10 ppm.
