This work describes the application of a highly efficient catalyst (NH₂-UiO-66-Mo) to the catalytic oxidation desulfurization process. NH₂-UiO-66-Mo can greatly improve the efficiency of oxidative desulfurization The optimum operating conditions of NH₂-UiO-66-Mo are investigated through experiments, which prove the excellent performance of the catalyst, and the reaction mechanism is further studied through a series of characterizations.

Abstract

A highly efficient oxidative desulfurization composite catalyst NH₂-Uio-66-Mo has been prepared and applied in the catalytic oxidative desulfurization. It was elucidated that Mo⁶⁺ could increase the oxygen vacancies and active sites on the catalyst and increase the pore size of UiO-66. Meanwhile, the removal rate of dibenzothiophene (DBT) reached 99.2 % after 60 min under optimal conditions and remained above 90 % after 5 cycles, showing the composite catalyst's remarkable catalytic performance and satisfactory reusability NH₂-UiO-66-Mo. In addition, kinetic studies revealed that the desulfurization process can present a pseudo-first-order kinetic process. The apparent activation energy was 10.6 kJ/mol. Finally, in combination with oxides, possible oxidation pathways were identified.