Oxidative coupling of aniline and desulfurization over nitrogen rich mesoporous carbon

Reena Goyal, Deepa Dumbre, L. N.Sivakumar Konathala, Monica Pandey, Ankur Bordoloi

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    29 Scopus citations

    Abstract

    Tungsten loaded mesoporous nitrogen rich carbon (WOxMCNx) materials were synthesized using SBA-15 as a hard template. With these new multifunctional materials, we performed a one-pot oxidative coupling of aniline to azo-benzene followed by desulfurization of dibenzothiophene (DBT) to dibenzothiophene sulfone (DBTSO). It was observed that the nature of the support for the catalyst has a strong influence on the activity of the WOx nanoparticle. Whilst WOx on MCNx proved to be a very active and selective catalyst for the formation of azo-benzene via oxidation of aniline as well as dibenzothiophene sulfone from dibenzothiophene, WOx on activated carbon or SBA-15 did not show comparable activity. These multifunctional hybrid catalysts retain their structural framework even after the reaction, and they were recovered easily from the reaction mixture through filtration and reused several times without a significant degradation in activity. Moreover, there was no contribution from leached active species in the activity and conversion was possible only in the presence of the multifunctional catalyst.

    Original languageBritish English
    Pages (from-to)3632-3638
    Number of pages7
    JournalCatalysis Science and Technology
    Volume5
    Issue number7
    DOIs
    StatePublished - 1 Jul 2015

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