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The influence of gallium on alumina-supported NiMo catalysts was investigated by correlating their physicochemical properties with the hydrodesulfurization (HDS) activity of model molecules. The Ga–γ-Al 2 O 3 supports were prepared by impregnation of Ga (0.6–5.9 wt%) on γ-Al 2 O 3 . The NiMo catalysts were prepared following the same method on calcined Ga–Al 2 ...
Ni2P that was highly active in the hydrodesulfurization of dibenzothiophene was obtained by reduction of a phosphate precursor with a P/Ni molar ratio as low as 1.2 over cerium oxide-modified Al2O3 (Ce–Al2O3) and macromesoporous Al2O3 (M-Al2O3). 27Al MAS NMR revealed that this is likely due to the low reactivity of pentahedrally coordinated Al3+ (Al(P)) with phosphorus oxide. Because the major Al...
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