Recent advances in the science and technology of ultra low sulfur diesel (ULSD) production

Deep desulfurization of diesel fuel using ionic liquids: current status and future challenges

Environmental concerns have introduced a need to remove sulfur-containing compounds from light oil. As oxidative desulfurization is conducted under very mild reaction conditions, much attention has recently been devoted to this process. In this contribution, the developments in selective removal of organosulfur compounds present in liquid fuels via oxidative desulfurization, including both chemical oxidation and biodesulfurization, are reviewed. At the end of each section, a brief account of the research directions needed in this field is also included.

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Oxidative processes of desulfurization of liquid fuels

Retracted article: Towards near zero-sulfur liquid fuels: a perspective review

https://www.rsc.org/suppdata/GC/b7/b710651c/b710651c.pdf

Desulfurisation of oils using ionic liquids: selection of cationic and anionic components to enhance extraction efficiency

Manganese and cobalt oxide catalysts supported on γ-Al 2 O 3 have been found to be effective in catalyzing air oxidation of the sulfur impurities in diesel to corresponding sulfones at a temperature range of 130–200 °C and atmospheric pressure. The sulfones were removed by extraction with polar solvent to reduce the sulfur level in diesel to as low as 40–60 ppm. Oxidation of model compounds showed that the most refractory sulfur compounds in hydrodesulfurization of diesel were more reactive in oxidation. The oxidative reactivity of model impurities in diesel follows the order: trialkyl-substituted dibenzothiophene > dialkyl-substituted dibenzothiophene > monoalkyl-substituted dibenzothiophene > dibenzothiophene.

Teo Yin Nah

Papers

A novel oxidative desulfurization process to remove refractory sulfur compounds from diesel fuel