NiMo催化剂上MoS_2形貌与其DBT加氢脱硫选择性的关系(英文)  

Relation between the morphology of MoS_2 in NiMo catalyst and its selectivity for dibenzothiophene hydrodesulfurization

作　　者：刘理华[1,2] 刘迪[1] 刘宾[1] 李广慈[1] 柳云骐[1] 刘晨光[1] 

机构地区：[1]中国石油大学(华东)重质油国家重点实验室CNPC催化重点实验室,山东青岛266555 [2]淮北师范大学化学与材料科学学院,安徽淮北235000

出　　处：《燃料化学学报》2011年第11期838-843,共6页Journal of Fuel Chemistry and Technology

基　　金：Major State Basic Research Development Program of China(973 Program,2010CB226905)

摘　　要：制备了两个系列不同镍钼负载量的NiMo催化剂,并用X衍射、N2物理吸附和透射电镜进行了表征。以二苯并噻吩为模型硫化物,在高压固定床微型反应器上对该NiMo催化剂的加氢脱硫性能进行了评价,研究了MoS2形貌与催化剂加氢脱硫选择性之间的关系。结果表明,镍钼负载量对MoS2形貌有明显的影响。Mo18Ni4催化剂(含18%MoO3和4%NiO)上MoS2呈多级层状结构,具有较高的加氢脱硫活性和优异的加氢脱硫选择性。加氢选择性与催化剂上活性组分MoS2的堆积层数相关联呈很好的线性关系;堆积层数越多,其加氢选择性也越高。Two series of NiMo catalysts supported on alumina with different loadings of molybdenum and nickel were prepared and characterized by X-ray diffraction,N2 sorption,and high-resolution transmission electron microscopy.The performance of NiMo catalysts for hydrodesulfurization was evaluated in a fixed-bed microreactor using dibenzothiophene as a model compound.The effect of morphology of MoS2 phase in NiMo catalyst on its hydrogenation selectivity was investigated.The results indicated that the morphology of MoS2 phases is affected by the loadings of molybdenum and nickel.Mo18Ni4 catalyst（containing 18% MoO3 and 4% NiO）,which is provided with the well-known MoS2 slab structures with a multilayered morphology,exhibits high hydrodesulfurization activity and hydrogenation selectivity.The hydrogenation selectivity of NiMo catalyst is linearly correlated with the stacking number of MoS2 slab;the higher the stacking number,the better is the hydrodesulfurization selectivity.

关 键 词：NiMo催化剂 加氢脱硫 MoS2形貌 加氢选择性 二苯并噻吩 堆积层数 

分 类 号：TE624.4[石油与天然气工程—油气加工工程]