Oxidative Desulfurization of Hydrocarbon Fuels

Desulfurization of model diesel by extraction/oxidation using a zinc-substituted polyoxometalate as catalyst under homogeneous and heterogeneous (MIL-101(Cr) encapsulated) conditions

“…Therefore, to produce ultralow sulfur fuels, new complementary processes have been investigated [3,4]. One of the most promising methods is oxidative desulfurization (ODS) [4,5]. In this process, the refractory sulfur compounds are oxidized to sulfoxides and sulfones with subsequent removal of these products by extraction or adsorption [5][6][7][8][9][10][11][12].…”

Heterogeneous titanium catalysts for oxidation of dibenzothiophene in hydrocarbon solutions with hydrogen peroxide: On the road to oxidative desulfurization

“…In the ODS process, the organic sulfides are oxidized to the corresponding sulfoxides and sulfones, that are in turn removed by extraction, adsorption, distillation or decomposition [6]. Although several oxidants, such as ozone or nitrogen oxides, have been tested [5], alkyl hydroperoxides, molecular oxygen, and hydrogen peroxide are undoubtedly the most interesting ones from environmental and economic points of view. The ideal system should use heterogeneous catalysts and * Corresponding author.…”

“…The most important method for removing sulfur compounds from fuel is hydrothermal desulfuration (HDS) but a part of organic sulfur compounds is not easily removed and very high temperature and pressure conditions should be used to remove these recalcitrant sulfur compounds [2] making the HDS process very expensive. Alternative desulfuration strategies are currently envisaged and oxidative desulfuration (ODS) is one of the most interesting [3][4][5][6]. In the ODS process, the organic sulfides are oxidized to the corresponding sulfoxides and sulfones, that are in turn removed by extraction, adsorption, distillation or decomposition [6].…”

Efficient H2O2/CH3COOH oxidative desulfurization/denitrification of liquid fuels in sonochemical flow-reactors

“…Nevertheless, the last few hundred ppm of S-compounds in diesel, mainly dibenzothiophene (DBT) alkyl derivatives, are very difficult to remove even under harsh hydrodesulfurization conditions [9]. Of the new strategies developed, oxidative desulfurization (ODS) and denitrification (ODN) appear to be particularly promising [10].…”