The bimetallic Ni-W oxide catalyst supported on USY- Al₂O₃ has been prepared and converted into Ni-W sulfide, carbide and nitride catalysts. These four types of catalysts have been characterized by surface area measurements, pulsed CO chemisorption, thermogravimetric analysis, X-ray diffraction, temperature-programmed reduction and pyridine infrared spectroscopy. The initial decalin reaction activity of the catalysts decreases in the order of carbide catalyst > oxide catalyst > sulfide catalyst >> nitride catalysts. The catalysts deactivation decreases in the order of: sulfide catalyst > carbide catalyst >> nitride catalyst > oxide catalyst. The initial ring-opening activity decreases in the order of carbide catalyst > oxide catalyst ∼sulfide catalyst >> nitride catalyst. The catalyst activity has relation with the metal sites, the amount of the strong Brönsted acid sites and the surface area on the catalyst. Besides these, the catalyst deactivation also has the close relation with the coke produced on the catalyst during the reaction.

USY-Al ₂ O ₃上负载的双金属Ni-W氧化物催化剂已制备并转化为Ni-W硫化物，碳化物和氮化物催化剂。通过表面积测量，脉冲CO化学吸附，热重分析，X射线衍射，程序升温还原和吡啶红外光谱对这四种类型的催化剂进行了表征。催化剂的初始十氢化萘反应活性按碳化物催化剂>氧化物催化剂>硫化物催化剂>氮化物催化剂的顺序降低。催化剂的失活程度依次为：硫化物催化剂>碳化物催化剂>氮化物催化剂>氧化物催化剂。初始开环活性以碳化物催化剂＞氧化物催化剂〜硫化物催化剂＞氮化物催化剂的顺序降低。催化剂的活性与金属位点有关，强布朗斯台德酸位的数量和催化剂的表面积。除此之外，催化剂的失活还与反应过程中在催化剂上产生的焦炭有密切的关系。