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- W4220802908 abstract "The intrinsic kinetics of hydrodesulfurization (HDS) of 4,6-dimethyldibenzothiophene (4,6-DMDBT) over mesoporous CoMoS2/ZSM-5 (CoMoS2/MZSM-5) was investigated by comparing the commercial CoMoS2/γ-Al2O3. A pseudo-first-order kinetic model considering the direct desulfurization (DDS) and two detailed partial and full hydrogenation pathways was formulated with simple power law rate equations. The apparent rate constants of five lumped reactions on CoMoS2/MZSM-5 are 2–4 times larger than those of CoMoS2/γ-Al2O3. With both catalyst system, the pre-exponential factor plays a dominant role in the reaction rate of DDS pathway showing equally high activation energies. The apparent activation energies show a critical effect on the reaction rate of two hydrogenation and subsequent desulfurization reactions. Furthermore, the Delplot analysis was applied to identify the reaction sequence of product formation and verify the reaction network. The HDS performance and reaction rates of individual reaction steps can be rationally linked to the morphology and available content of CoMoS phase as identified by HRTEM and XPS characterization. Thus, multi-stacked MoS2 nanocrystallites on CoMoS2/MZSM-5 provide more available sulfur vacancies to facilitate the DDS pathway, and catalyze efficiently the hydrogenation and subsequent desulfurization with the synergy of brim sites and sulfur vacancies." @default.
- W4220802908 created "2022-04-03" @default.
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- W4220802908 date "2022-04-01" @default.
- W4220802908 modified "2023-10-14" @default.
- W4220802908 title "Insights into the intrinsic kinetics for efficient hydrodesulfurization of 4,6-dimethyldibenzothiophene over mesoporous CoMoS2/ZSM-5" @default.
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- W4220802908 doi "https://doi.org/10.1016/j.jcat.2022.03.010" @default.
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