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Issue 14, 2018
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Deep oxidative desulfurization of dibenzothiophene with {Mo132} nanoballs supported on activated carbon as an efficient catalyst at room temperature

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Abstract

In this paper, the Keplerate nanoball iso-polyoxomolybdate {Mo132} supported on activated carbon (AC) has been synthesized and evaluated as a new, green and cost-effective catalyst for the oxidative desulfurization of a model fuel containing dibenzothiophene (DBT). The {Mo132}/AC catalysts, which were prepared with various {Mo132} contents, were characterized using FT-IR, XRD, SEM, EDX, ICP-OES, H2-TPR and nitrogen adsorption/desorption isotherms. Experimental evaluations showed that the catalyst was highly efficient in the removal of DBT using hydrogen peroxide (H2O2) as the oxidant, which could result in a sulfur removal of up to 99.5% (or even more than that) under optimum reaction conditions. The factors affecting the process including catalyst dosage, temperature, O/S molar ratio, reaction time and initial sulfur content were evaluated, and the optimum operating conditions were determined. In addition, the new catalyst was recoverable and the recovered {Mo132}/AC demonstrated a relatively similar catalytic activity to the fresh one. According to the results of GC-MS analysis, a sulfone species was found to be the only product of DBT oxidation by H2O2 over {Mo132}/AC. Moreover, a mechanism for the oxidative desulfurization of DBT by the new catalyst was proposed. The present study suggested that the {Mo132}/AC composite could be used as an efficient catalyst for the deep oxidative desulfurization and removal of refractory sulfur compounds in fossil fuels.

Graphical abstract: Deep oxidative desulfurization of dibenzothiophene with {Mo132} nanoballs supported on activated carbon as an efficient catalyst at room temperature

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Publication details

The article was received on 10 Apr 2018, accepted on 18 Jun 2018 and first published on 21 Jun 2018


Article type: Paper
DOI: 10.1039/C8NJ01735B
Citation: New J. Chem., 2018,42, 12188-12197
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    Deep oxidative desulfurization of dibenzothiophene with {Mo132} nanoballs supported on activated carbon as an efficient catalyst at room temperature

    A. Mojaverian Kermani, A. Ahmadpour, T. Rohani Bastami and M. Ghahramaninezhad, New J. Chem., 2018, 42, 12188
    DOI: 10.1039/C8NJ01735B

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