Alumina-Supported NiMo Hydrotreating Catalysts-Aspects of 3D Structure, Synthesis, and Activity.

ABSTRACT: Preparation conditions have a vital effect on the structure of alumina-supported hydrodesulfurization (HDS) catalysts. To explore this effect, we prepared two NiMoS/Al₂O₃ catalyst samples with the same target composition using different chemical sources and characterizing the oxidic NiMo precursors and sulfided and spent catalysts to understand the influence of catalyst structure on performance. The sample prepared from ammonium heptamolybdate and nickel nitrate (sample A) contains Mo in the oxidic precursor predominantly in tetrahedral coordination in the form of crystalline domains, which show low reducibility and strong metal-support interactions. This property influences the sulfidation process such that the sulfidation processes of Ni and Mo occur tendentially se

SUBMITTER: Li M 

PROVIDER: S-EPMC9639170 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature