钼/活性炭渣油加氢催化剂的制备

渣油加氢工艺是一种渣油深度加工技术，高性能渣油加氢催化剂的研发是其核心。本文以钼酸铵为活性组分前体，采用等体积法制备了钼/活性炭催化剂（Mo/AC），考察了制备条件如金属负载量、焙烧温度、溶液pH值等对催化剂的影响，利用XRD、SEM、XPS等手段对催化剂进行了表征。在浸渍时间4h，焙烧温度440 ℃条件下制备出负载量8%（以MoO3 计）的Mo/AC 催化剂，活性组分钼呈高度分散的单层分布，催化剂活性评价结果表明，渣油转化率可达79%，馏分油收率为75%，同时，生焦率控制在1.5%的较低水平上。

Preparation of activated carbon supported molybdenum-based catalysts for hydroprocessing of residue

Residue hydroprocessing technology is a significant residue upgrading technology, and the development of catalysts with high performance is the core issue. In this paper, a novel activated carbon supported molybdenum-based catalyst (Mo/AC) for hydroprocessing of residue was prepared by the incipient wetness impregnation method using (NH4)6Mo7O24?4H2O as precursor. The effect of preparation conditions, including MoO3 loading, calcination temperature and pH value on catalytic activity was investigated. The catalyst was characterized by means of XRD, SEM, XPS, and the characterization results indicated that Mo atoms were monolayer-dispersed on the surface of activated carbon. Under the following conditions：impregnation time 4 h, calcination temperature 440 ℃, loading amount of MoO3 8%, the prepared Mo/AC catalyst achieved high levels of residue conversion (＞79%) and distillate yield (＞75%) and low coke yield (＜1.5%) .