关键词: 柴油, 深度加氢脱硫, 非负载 NiMoW 加氢催化剂

Abstract: An unsupported Ni-Mo-W hydrogenation catalyst was prepared using synthetic porous metal solid solution as precursor. The sulfided catalyst was characterized with XRD and TEM techniques, and the hydrodesulfurization performance of the catalyst was evaluated using Daqing FCC LCO and Middle East diesel fuel as low and high sulfur feedstock, respectively. The results show that the active metal phases in the unsupported Ni-Mo-W catalyst are mainly NiS2 and MoS2/WS2, and the stacked layers of MoS2/WS2 reach 3～8, which is much higher than that of the conventional supported catalyst. This unsupported Ni-Mo-W catalyst exhibits good hydrodesulfurization activity and stability while processing diesel fuels with various sulfur contents.

Key words: diesel oil, deep hydrodesulfurization, unsupported NiMoW hydrogenation catalysts