Abstract
The characterization and hydrodenitrogenation activity of 3-methyl pyridine have been obtained. The results from the characterization techniques (X-ray diffraction (XRD), temperature-programmed reaction (TPR) and XPS) were used to illustrate the structure, surface reduction properties and the role of Ni metal in the reaction. The NiMoN x /γ-Al 2O 3 catalyst is more active than a Mo 2N/γ-Al 2O 3 catalyst with the same MoO 3 loading. Mo 2N, Ni 3Mo 3N and Ni metal are formed in the NiMoN x /γ-Al 2O 3 catalyst; moreover, the synergy among them is probably responsible for the high activity of NiMoN x /γ-Al 2O 3 catalyst. The addition of Ni metal enhances the reducibility of Mo 2N/γ-Al 2O 3 phase and also promotes the HDN activity. The reasons for reduction before reaction and the surface ion state changes during reduction are illustrated by XPS techniques.
Published Version
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