Deep extractive desulfurization and denitrogenation of various model oils by H3+nPMo12-nVnO40 supported on silica-encapsulated gamma-Fe2O3 nanoparticles for industrial effluents applications

作者：Rafiee Ezzat^*; Rezaei Susan

来源：Journal of the Taiwan Institute of Chemical Engineers, 2016, 61: 174-180.

DOI：10.1016/j.jtice.2015.11.027

• Extractive desulfurization
• Denitrogenation
• Oil
• Heterogeneous catalyst
• Molybdovanadophosphoric acid
• Oxidative desulfurization

A series of magnetic nanocatalyst was synthesized by the immobilization of H3+nPMo12-nVnO40 on the surface of silica-encapsulated gamma-Fe2O3 nanoparticles (Fe@Si). The obtained catalyst was characterized by high resolution transmission electron microscopy (HR-TEM), field emission scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), surface area (Brunauer-Emmett-Teller, BET), vibrating sample magnetometer (VSM) and X-ray diffraction (XRD). Acidity of the catalyst was measured by a potentiometric titration. Extractive oxidation of the sulfur-based compounds was studied under optimized and mild conditions. Magnetic catalyst exhibited excellent yield and selectivity for liquid and solid sulfides in oxidation reaction. Catalytic activity of magnetic catalyst was investigated in the oxidative desulfurization (ODS) of different model oils. Denitrogenation and the effect of nitrogen containing, one ring and two ring aromatic compounds on sulfur removal of model oil were also studied. Effect of different extractant in performance of ODS process was checked. The excellent conversions show that the catalyst has strong and sufficient activity, which are responsible for its catalytic performance. ODS system containing the catalyst could be recycled at least four times with only a slight decrease in the catalytic performance.

• 出版日期2016-4