Abstract
Oxidative desulfurization (ODS) in diesel has attracted great attention for meeting the increasingly stringent standards in last few decades but remains a huge challenge that oxidant is underutilization. We achieve the high sulphur removal and the lowest n(H2O2)/n(S) over a smart heterogeneous catalyst of Fe-containing Ti-nanotube (Fe-TiNTs) which was prepared and synthesized by one-step hydrothermal method. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 adsorption–desorption and so on were used to characterize the catalyst. For DBT, the sulphur removal rate was nearly 99%, the Fe-TiNTs showed excellent catalytic selectivity in ODS, and their activity does not decrease significantly in the presence of various diesel compounds. The characterizations and iodometric titration analyses show that the high activity is related to the mechanism of Ti-η1-hydroperoxide and radical oxidation.
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The authors thank the National Natural Science Foundation of China (No. 21902118).
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Qi, X., Tang, X., Li, Q. et al. Immediate Oxidative Desulfurization via Fe-Containing Ti-Nanotube Triggered Combined-Radical Mechanism. Catal Lett 153, 2169–2175 (2023). https://doi.org/10.1007/s10562-022-04152-7
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DOI: https://doi.org/10.1007/s10562-022-04152-7