钼/活性炭渣油加氢催化剂的硫化

钼/活性炭催化剂是一种新型渣油加氢催化剂，其硫化效果直接决定着催化剂的活性和稳定性。实验考察了硫化条件对钼/活性炭催化剂（Mo/AC）硫化度的影响，运用X射线衍射（XRD）、X射线光电子能谱（XPS）、扫描电子显微镜（SEM）和透射电镜（TEM）等手段对硫化态催化剂进行了表征。结果表明，以二硫化碳为硫化剂，正十六烷为硫化介质，在硫化温度350 ℃，硫化时间3 h，氢气初压6 MPa条件下催化剂硫化度为85%，活性相MoS2堆垛结构为4～6层，晶片长度为6～10 nm，分布比较均匀，具有良好的加氢活性。

Sulfurization of activated carbon supported molybdenum-based catalysts for hydroprocessing of residuum

Activated carbon supported molybdenum-based catalyst (Mo/AC) is a novel catalyst for hydroprocessing of residuum，and the sulfidation degree determines the activity and stability of catalyst. The sulfurization behavior of Mo/AC was studied. The sulfided catalyst was characterized by means of XRD，XPS，SEM and TEM. Under the following conditions：CS2 as sulfiding agent，n-hexadecane as sulfiding medium，sulfiding temperature 350℃，sulfiding time 3 h，partial pressure of H2 6 MPa，the sulfidation degree of sulfided catalyst was up to 85%. Multilayered MoS2 phase was highly dispersed，with stacking structure of 4～6 layers and length of slabs 6～10 nm. Evaluation demonstrated that sulfided catalyst achieved a high level of conversion at high distillate selectivity with low coke yield in atmospheric residuum conversion.