Ni-Mo/USY催化剂在煤焦油加氢裂化中的研究

Ni-Mo/USY catalysts for coal tar hydrogenation cracking

采用USY型分子筛为载体,通过浸渍法制备了Ni-Mo/USY催化剂,并用硫代硫酸铵对催化剂进行器外预硫化,在连续固定床上考察了不同Mo负载量对加氢裂化的影响。采用XRD、NH_3-TPD、H2-TPR等手段对催化剂进行了系列表征,并对加氢裂化轻质油进行密度、黏度、元素分析、馏程等测试。结果表明:当T=370℃;p=9 MPa,WHSV=0.6 h^(-1),V(H2)/V(oil)=1 000∶1时,最佳Mo负载量为10%,加氢裂化轻质油收率为93%。

Ni-Mo / USY catalysts are prepared via impregnation method by using USY type molecular sieve as the carrier.（ NH4）2S2O3 is used in the Ex-Situ presulfiding process. The obtained catalysts are characterized by XRD,NH3-TPD and H2-TPR. The effect of Mo loading concentrations on hydrocracking is investigated by orthogonal test in a continuous flow fixed-bed reactor. The density,kinematic viscosity,elemental composition and boiling range of hydrocracked light oil are measured. The results show that Mo loading content and the yield of hydrocracked light oil can reach 10% and 93%,respectively,under the following conditions： 370℃ of temperature,9 MPa of pressure,0. 6 h^- 1of weight hourly space velocity（ WHSV） and 1000 of H2/ oil ratio.