Oxidative desulfurization of oil model in the presence of modified polyoxometalate hierarchical Y zeolite

Zeolites are microporous crystalline aluminosilicate materials that have uniform, adjustable pores and a cage-like structure. The basic structural feature of a zeolite is a three-dimensional tetrahedral framework in which each oxygen atom is shared by two tetrahedra. The pore size of Y zeolite plays an important role in determining its adsorption, diffusion, and catalytic behavior, making it an important factor in various applications. Zeolites with good sulfur adsorption capacity, good regeneration ability, and stable structure have been shown to remove sulfur compounds[۱]. The Y zeolite was hierarchical by hydrothermal method and NH۴OH action, TiO۲, WO۳ and MoO۳ were introduced into zeolite as polyoxometalate. The obtained catalysts were identified using XRD, UV-Vis, FT-IR and FE-SEM techniques. The formation of hierarchical zeolite is associated with the preservation of the structure, but with the formation of polyoxometalate in the pores of zeolite, partial degradation is observed. The catalytic activities of the catalysts in oxidative desulfurization (ODS) were investigated and the reaction was monitored by GC[۲]. The effect of various parameters including temperature, catalyst amount, oil model concentration and reaction time on ODS was investigated using Taguchi software. The synthesized catalyst was used in the removal reaction of sulfur compounds through oxidative desulfurization and oil model was used as a model. The results showed that H۵PMo۱۱TiO۴۰/Y and H۳PMo۱۲O۴۰/Y catalysts had the highest removal percentage, It has the highest percentage of desulfurization[۳].

کلیدواژه ها:

zeolite ، polyoxometalate ، hierarchical