The catalytic activities of the dispersed Ni_xW_(1-x)S₂ catalysts were investigated for hydrocracking (HCK) of vacuum residue (VR) at 693K, 9.5MPa H₂ with the same amount of catalyst loading of 0.113 mmol as a metal basis. The catalysts were prepared in situ in the reaction using nickel acetylacetonate and tungsten hexacarbonyl as Ni and W precursors, respectively. Structural properties of the dispersed catalysts were characterized by extended X-ray absorption fine structure (EXAFS) and transmission electron microscopy (TEM), which confirmed the formation of well-dispersed Ni_xW_(1-x)S₂ phase in size ranges of 8-10 nm. Moreover, it was demonstrated that the bimetallic metal sulfides of Ni_xW_(1-x)S₂ feature a promotional activity in the VR HCK, showing higher turn-over frequency values and lower coke formations in the VR HCK than mono-metal sulfides.

研究了分散的Ni _x W _（1-x） S ₂催化剂在693K，9.5MPa H ₂下真空残余物（VR）的加氢裂化（HCK）和相同量的金属负载0.113 mmol时的催化活性。基础。在反应中原位制备催化剂，分别使用乙酰丙酮镍和六羰基钨作为Ni和W前体。分散的催化剂的结构性质通过扩展的X射线吸收精细结构（EXAFS）和透射电子显微镜（TEM）进行了表征，这证实了Ni _x W _（1-x） S ₂分散良好相的尺寸范围为8-10nm。此外，已证明Ni _x W _（1-x） S ₂的双金属金属硫化物在VR HCK中具有促进活性，与单金属硫化物相比，在VR HCK中显示出更高的周转频率值和更低的焦炭形成。 。