In this manuscript, to obtain a high-purity fuel, a new inorganic–organic hybrid (IOH) nanocomposite (PMnW11@PANI@CS) based on mono-supplanted heteropolyanion (PMnW11), polyaniline (PANI), and chitosan (CS) was synthesized successfully. The synthesized nanocomposite (PMnW11@PANI@CS) was employed as a nanocatalyst in the nanocatalytic oxidative desulfurization (NODS) process. PMnW11@PANI@CS was confirmed by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), UV–vis, Fourier transform infrared spectroscopy (FT-IR), and energy-dispersive X-ray spectroscopy (EDX) analysis. The elimination of hazardous molecules containing sulfur from real and simulated gasoline was done according to the NODS process. The sulfur compounds in gasoline were oxidized and disengaged effectively under a mild reaction. PMnW11@PANI@CS with nanocatalytic activity was used as a recyclable nanocatalyst in this process. PMnW11@PANI@CS was evaluated in the NODS process using a combination of CH3COOH and H2O2 in a 1:2 volume ratio as an oxidant system. The results were compared with the obtained results of a simulated gasoline oxidation process under the same conditions. Furthermore, the effect of the nanocatalyst, types of oxidation system, dosage of the nanocatalyst, temperature, and reaction time on the NODS efficiency were investigated. Experimental results show that owing to the excellent efficiency of the PMnW11@PANI@CS NODS system, it can be a promising method to attain super clean gasoline.

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To obtain clean gasoline, a new nanohybrid catalyst (TPA@PAN@CH) was synthesized by immobilizing tungstophosphoric acid (TPA) on the surface of polyaniline (PAN) and chitosan (CH) polymers. The features of the materials were detected by FT-IR, UV/vis, XRD, FE-SEM, and EDX methods. The XRD patterns demonstrate that the average crystallite size of the TPA@PAN@CH is estimated to be approximately 45 nm, which corresponds to the results of the FE-SEM.The catalytic performance of the TPA@PAN@CH was tested in the nanocatalytic oxidative desulfurization (Ncat-ODS) of gasoline and model fuels by H 2 O 2 /AcOH (volume proportion of 2:1) oxidizing agent. The best desulfurization outcomes were achieved by 0.1 g of the TPA@PAN@CH as a nanocatalyst at 35 C under mild reaction conditions. Based upon the above findings, the sulfur content could be declined from 0.4986 to 0.0193 wt%, which corresponds to performance of 96%. Mercaptan concentration decreased from 98 to 4 ppm, and the removal efficiency of model fuels declined in the order of DBT ≥ BT > Th.The high catalytic activity of TPA@PAN@CH was maintained for five cycles without significantly diminishing its performance. This work suggested the potential application of the TPA@PAN@CH for eliminating of hazardous sulfur compounds that significantly affect the efficacy of the Ncat-ODS.