Thiophene hydrodesulfurization and diesel fuel hydrorefining activities of XMo6(S)/gamma-Al2O3 and Ni-XMo6(S)/gamma-Al2O3 (X = Al, Ga, In, Fe, Co, and Ni) catalysts

摘要

XMo6(S)/gamma-Al2O3 and Ni-XMo6(S)/gamma-Al2O3 catalysts based on Anderson heteropoly compounds (HPCs), where X = Al, Ga, In, Fe, Co, and Ni, were synthesized. The nature of the precursor HPC determines the activity of the catalysts in thiophene hydrogenolysis and diesel fuel hydrorefining in a flow-through setup. The activity of Ni-XMo6(S)/gamma-Al2O3 with X = Al, Ga, and In in diesel fuel dehydrosulfurization increases in the order Al < Ga < In. For catalysts in which the heteroatom is an element of the iron triad, the order of the increasing activities is Fe < Co < Ni. The highest activity in both reactions was observed for catalysts based on InMo6-HPC and NiMo6-HPC: the residual sulfur in the hydrogenizates obtained over them at 320A degrees C was 2.5 times lower than over a conventional ammonium paramolybdate-based catalyst, whereas the degree of hydrogenation of polycyclic aromatic hydrocarbons (PAH) was 15-16 rel. % higher.