Synthesis of (Gly) ₃ PMo ₁₂ O ₄₀ @ MnFe ₂ O ₄ organic/inorganic hybrid nanocomposite as an efficient and magnetically recoverable catalyst for oxidative desulfurization of liquid fuels

Abstract

Summary Here, we report on the preparation and characterization of a new organic/inorganic hybrid nanocomposite comprised of the glycine‐modified polyoxomolybdate (abbreviated as (Gly)3PMo12O40) and manganese ferrite (MnFe2O4) nanoparticles. The hybrid nanocomposite was successfully synthesized under mild ultrasound irradiation and characterized by powder X‐ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscope, energy dispersive X‐ray, and vibrating sample magnetometer techniques. To explore the (Gly)3PMo12O40@MnFe2O4 applicability, it was used in catalytic oxidative desulfurization (Cat‐ODS) reactions. The experimental results revealed excellent catalytic activity of the hybrid nanocomposite in the removal of hazardous organosulfur compounds from model fuel oils (MFOs) and typical real gasoline. The sulfur removal from MFOs could reach up to 95% at the operating temperature of 35°C, the ambient pressure, and the contact time of 1 hour. Quite surprisingly, the total sulfur content of real gasoline was lowered from 0.4985 to 0.0198 wt% under the same reaction conditions. In addition, the (Gly)3PMo12O40@MnFe2O4 presented a brilliant magnetically reusability with slight diminution after seven consecutive Cat‐ODS cycles. These results encourage the further exploration of the application of (Gly)3PMo12O40@MnFe2O4 organic/inorganic hybrid nanocomposite in the production of clean diesel and jet fuels.

Remarkable Catalytic Performance of MoO(O2)2 Loaded in NH2‐UiO‐66 for Oxidative Desulfurization of Fuel Oil

“…This means that the synthesized can improve fuel quality only by decreasing the sulfur level. It shows that N‐U‐Mo has excellent activity in the production of environmentally friendly real fuel and has potential for industrial application [52,53] …”

Novel Gemini ionic liquid for oxidative desulfurization of gas oil

“…Efficient desulfurization can be achieved by multistage extraction desulfurization (EDS) 10,11 ; however, the process costs are high because of the high amount of extractant used and the regeneration problems that may occur during the process 1,12,13 . Large amounts of catalysts are required for oxidative desulfurization (ODS) [14][15][16][17] . Moreover, regeneration difficulties and poor repeatability are caused by the loss of catalytic active sites during the process.…”

Extractive Catalytic Oxidative Deoxygenation of Model Fuels Catalyzed by a Vanadium-Substituted Heteropolyacid and Molecular Oxygen

“…23 Other methods for the removal of sulfur are the use of Ti oxoclusters in ionic liquids with an extractant, such as alcohols and glycol derivatives, 24 or the application of heterogeneous nanohybrid POMs with magnetic properties to ease the purification of the reaction medium. 21,22 While the removal of sulfuric compounds is achieved to a high degree and under mild conditions, the synthesis strategies are far more complex and money-consuming than the comparably simple and cheap HPA-5 Keggin-type synthesis. 25 The desulfurization of fuels with Lindqvist-type HPAs has also been conducted and is slightly faster than the desulfurization with Keggin-type HPAs.…”

“…This type of catalyst is able to conduct oxidation reactions in liquid phase systems with high selectivity. ,, POMs can be used in both homogeneous and heterogeneous removal of fuel impurities depending on the limitation of the desired reaction and process. The immobilization of POMs has been conducted successfully for desulfurization processes using nanoparticles as support material, yielding high removal rates of sulfur components. − Nonetheless, heterogeneous catalysis poses the possibility of transport limitations on a large scale and therefore homogeneous catalysis is preferred at this point. , The subtype heteropolyanions (HPAs) in its Keggin structure is of special interest in this work, as it is relatively easy to synthesize and therefore to implement for industrial use on a larger scale. HPAs have been widely used in the oxidative valorization of bio-based reactants, such as glucose, glycerol, or cellulose …”