关键词: ＵｉＯ６６ＮＨ２, 催化, 氧化脱硫, 二苯并噻吩

Abstract: To overcome the high energy consumption and stringent conditions associated with conventional hydrodesulfurization (HDS) techniques, a novel oxidation desulfurization (ODS) method based on the metal-organic framework material UiO-66-NH₂ was investigated. This method employs dibenzothiophene (DBT) as a model sulfide, H₂O₂ as a green oxidant, and methanol as an extractant to achieve efficient desulfurization under mild conditions. The UiO-66-NH₂ catalyst, featuring high crystallinity and regular polyhedral morphology, was successfully synthesized via a solvothermal approach. Experimental studies investigated the effects of catalyst loading, reaction temperature, oxygen-to-sulfur ratio (O/S), and reaction time on desulfurization efficiency. Results indicate that under optimal conditions: 0.1 g catalyst loading, 60 ℃ reaction temperature, an O/S molar ratio of 4, and 180 min reaction time, DBT desulfurization exceeds 99%. The synergistic action of amino functional groups and Zr-oxo clusters promotes H₂O₂ activation to generate hydroxyl radicals (·OH). Concurrently, the material’s porous structure enhances the synergistic effects of sulfide adsorption and oxidation. This process offers advantages such as mild reaction conditions, elimination of hydrogen requirement, and environmental friendliness, providing an efficient, low-energy-consumption green pathway for achieving deep fuel desulfurization.

Key words: UiO-66-NH?, catalysis, oxidative desulfurization, dibenzothiophene