Oxidation reactivities of dibenzothiophenes in polyoxometalate/H2O2 and formic acid/H2O2 systems

Te, Mure; Fairbridge, Craig; Ring, Zbigniew

doi:10.1016/s0926-860x(01)00699-8

Cited by 371 publications

(209 citation statements)

References 17 publications

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“…Studies have shown that hydrogen peroxide appears to be a promising oxidizing agent in the catalyzed oxidation of sulfur compounds in fuels due to the fact that it offers a high amount of active oxygen and produces only water as a by-product. [18][19][20][21][22][23][24][25] The activity and selectivity of metal complexes immobilized on polymer microspheres have been reported in our previous studies to be as efficient as unsupported metal complexes. [26][27][28][29] In an attempt to improve the surface area of the polymeric support, electropsun polymer fibres have also been reportedly employed as an alternative.…”

Section: Introductionmentioning

confidence: 74%

The oxidation of dibenzothiophene using oxidovanadium(IV)-containing nanofibres as catalyst

OGUNLAJA,

HOSTEN,

TSHENTU

2015

S.Afr.j.chem

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Polyvinylbenzylchloride nanofibres were fabricated by the electrospinning technique and subsequently functionalized with a tetradentate ligand, 2,2'-(1E,1'E)-(1,2-phenylenebis(azan-1-yl-1-ylidene))bis(methan-1-yl-1-ylidene)bis(4-aminophenol). VO 2+ was then incorporated into the nanofibres to produce the catalyst VO-fibres. Microanalysis, TG and FT-IR were used for the characterization of VO-fibre, and EPR also confirmed the presence of oxidovanadium(IV) within the nanofibres. Oxidation of dibenzothiophene (DBT) was investigated by varying the catalyst amount, substrate amount, oxidant and temperature, and the progress of oxidation was followed with a gas chromatograph fitted with a flame ionization detector. An increase in the amount of oxidant caused an increase in the amount of dibenzothiophene sulfone (DBTO 2 ), while a decrease in the quantity of dibenzothiophene resulted in an increase in the overall yield of dibenzothiophene sulfone under a constant temperature and oxidant (H 2 O 2 ) concentration. Dibenzothiophene sulfone was confirmed as the oxidation product through 1 H-NMR spectroscopy and single crystal X-ray diffraction. KEYWORDSVanadium(IV) catalyst, nanofibres, dibenzothiophene, oxidation, hydrogen peroxide (H 2 O 2 ).

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Section: Introductionmentioning

confidence: 74%

The oxidation of dibenzothiophene using oxidovanadium(IV)-containing nanofibres as catalyst

OGUNLAJA,

HOSTEN,

TSHENTU

2015

S.Afr.j.chem

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“…Oxidative desulfurization is considered as the latest unconventional desulfurization process which involves chemical oxidation of divalent organic sulfur compounds to the corresponding hexavalent sulfur, also known as sulfone [53][54][55][56][57][58][59][60][61].…”

Section: Oxidative Desulfurization (Ods)mentioning

confidence: 99%

Recent Advances in the Science and Technology of Desulfurization of Diesel Fuel Using Ionic Liquids

Kowsari¹

2013

Ionic Liquids - New Aspects for the Future

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“…Many types of oxidative systems have been attempted, such as H 2 O 2 /organic acids, H 2 O 2 / inorganic acids, H2O 2 /Ti-containing zeolites and other non-hydrogen peroxide systems (e.g., N 2 O, O 3 , etc.) [25][26][27]. However, the selectivity for sulfides present in diesel fuels is not high in these oxidation systems, and some components of the fuel are also oxidized.…”

Section: Selective Oxidation Of Real Diesel In W/o Emulsionmentioning

confidence: 99%

Selective Oxidations on Recoverable Catalysts Assembled in Emulsions

Gao

Jiang

et al. 2005

Top Catal

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Catalysts assembled in emulsions are found to be potentially recoverable and efficient for a number of catalytic reactions. The catalysts composed of polyoxometalate anions and quaternary ammonium cations have been designed and synthesized according to the catalytic reactions and by optimizing the structures of cations and anions. The catalysts act essentially as surfactants, which are uniformly distributed in the interface of the emulsion droplets, and accordingly behave like homogeneous catalysts. The catalysts show remarkable selectivity and activity in the oxidation of sulfur-containing molecules to sulfones in diesel and the selective oxidation of alcohols to ketones, using H 2 O 2 as oxidant. For an example, the catalyst demonstrated over 96% efficiency of H 2 O 2 and~100 % selectivity to sulfones for the selective oxidation of sulfur-containing molecules in real diesel. Moreover, the catalysts can be separated and recycled by a simple demulsification and re-emulsification.

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Oxidation reactivities of dibenzothiophenes in polyoxometalate/H2O2 and formic acid/H2O2 systems

Cited by 371 publications

References 17 publications

The oxidation of dibenzothiophene using oxidovanadium(IV)-containing nanofibres as catalyst

The oxidation of dibenzothiophene using oxidovanadium(IV)-containing nanofibres as catalyst

Recent Advances in the Science and Technology of Desulfurization of Diesel Fuel Using Ionic Liquids

Selective Oxidations on Recoverable Catalysts Assembled in Emulsions

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