Journal
ROYAL SOCIETY OPEN SCIENCE
Volume 8, Issue 4, Pages -Publisher
ROYAL SOC
DOI: 10.1098/rsos.201736
Keywords
deep desulfurization; carbon nanotubes; thiophene
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This study utilized carbon nanotubes as carrier, loading deep eutectic solvents for the removal of sulfides in fuel oil, achieving good results. This loading method preserved the advantages of deep eutectic solvents while overcoming some issues, with the mutual promotion interaction between DESs and CNTs having important theoretical significance and industrial application value.
One source of air pollution is the combustion of sulfur compounds in fuel oil. Reducing sulfur content in fuel oil has become a hot issue demanding timely solutions. Using ionic liquids and deep eutectic solvents (DESs) to remove sulfides in fuel oil has achieved good results presently. However, since DESs are liquid and their transportation and separation are inconvenient, a new way is proposed that the DESs are loaded on the carbon nanotubes (CNTs) with large specific surface area and good chemical stability. A series of composites materials (DESs/CNTs) were prepared. Finally, they are applied to the removal of sulfides in fuel oil. This loading method, which imparts introduced unique physico-chemical properties of the DESs to the carrier materials, preserves both advantages while overcoming some of the problems with DESs. The interaction between DESs and CNTs is mutual promotion. Therefore, this study has important theoretical significance and industrial application value. Under optimal conditions, when the reagent ChCl/p-TsOH (1 : 2) was loaded on multi-walled CNTs (OD = 30-60 nm) to prepare the composite material (ChCl/p-TsOH)/CNTs, the single desulfurization rate of the composite material was 95.8%. Finally, the catalytic/oxidation mechanism was studied systematically and this work would provide a green route for the desulfurization of fuels.
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