Oxidative Desulfurization of Petroleum Distillate Fractions Using Manganese Dioxide Supported on Magnetic Reduced Graphene Oxide as Catalyst

Abstract

In this study, oxidative desulfurization (ODS) of modeled and real oil samples was investigated using manganese-dioxide-supported, magnetic-reduced graphene oxide nanocomposite (MnO2/MrGO) as a catalyst in the presence of an H2O2/HCOOH oxidation system. MnO2/MrGO composite was synthesized and characterized by scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) analyses. The optimal conditions for maximum removal of dibenzothiophene (DBT) from modeled oil samples were found to be efficient at 40 °C temperature, 60 min reaction time, 0.08 g catalyst dose/10 mL, and 2 mL of H2O2/formic acid, under which MnO2/MrGO exhibited intense desulfurization activity of up to 80%. Under the same set of conditions, the removal of only 41% DBT was observed in the presence of graphene oxide (GO) as the catalyst, which clearly indicated the advantage of MrGO in the composite catalyst. Under optimized conditions, sulfur removal in real oil samples, including diesel oil, gasoline, and kerosene, was found to be 67.8%, 59.5%, and 51.9%, respectively. The present approach is credited to cost-effectiveness, environmental benignity, and ease of preparation, envisioning great prospects for desulfurization of fuel oils on a commercial level.

Redox-driven strong interfacial interactions between MnO2 and covalent organic nanosheets for efficient oxygen reduction electrocatalysis

“…4a and S6 of the ESI †). 32 For this purpose, all XPS proles were analyzed on the S 2p orbitals of the thiophene components in the bare CON-32 and in the hybrids, and several deconvolution proles were obtained (Fig. 4 and S6, † blue, purple, green lines).…”

Key Factors Affecting the Development of Oxidative Desulfurization of Liquid Fuels: A Critical Review

“…The sulfur removal of MoO 3 /Al 2 O 3 (86.13) was higher than MoO 3 /SiO 2 -Al 2 O 3 (35.63). The MO catalysts can be supported on different supports such as Al 2 O 3 , SiO 2 -Al 2 O 3 , TiO 2 , Fe 3 O 4 , Fe 3 O 4 @SiO 2 , macroporous polyacrylic cationic exchange resin D113, graphene-like hexagonal BN nanosheets, silica gel, multiwalled carbon nanotubes (MWCNTs), magnetic-reduced graphene oxide (MrGO), graphite carbon, carbon nitride (g-C 3 N 4 ), CMK-3, SBA-15, MCM-41, silicon carbide (SiC), zirconia (ZrO 2 ), HY zeolite, magnetic mesoporous silica (MMS), and so on. It is shown that the support increases the catalytic activity and accessibility of metal oxides.…”

“…Some ILs can act as both extractant and catalyst such as [Omim]­[HSO 4 ], [BPy]­[BF 4 ], and [EimC 4 SO 3 H]­NTf 2 . Some ILs can be applied as only catalysts such as [Cn­(mim) 2 ]­Cl 2 /mFeCl 3 , [EMIM]­[NiCl 2 ], [EMIM]­[CoCl 2 ], [EMIM]­[MnCl 2 ], [PW 12 O 40 ], − …”

Recent Advances in Chitin and Chitosan/Graphene-Based Bio-Nanocomposites for Energetic Applications

“…Graphene possesses unique properties, such as a 1.42 Å carbon–carbon connection interval, a 3.3 Å thickness, a large surface area, high movement ability and significant optical, mechanical, electrical and thermal properties [ 37 , 38 ]. Meanwhile, GO was produced by the oxidation of graphite, which is composed of graphene and other functional groups, such as –C=O, –OH, –COOH and –COC– [ 39 ]. The existence of oxygenated functional groups on the surface of GO has caused it to have higher capacitance than graphene despite having a smaller surface area [ 40 ].…”