不同磷含量对NiMoP／Al2O3加氢处理催化剂的影响  

Influences of different phosphorus contents on NiMoP/Al_2O_3 hydrotreating catalysts

作　　者：周同娜[1] 尹海亮[1] 韩姝娜[1] 柴永明[1] 柳云骐[1] 刘晨光[1] 

机构地区：[1]中国石油大学(华东)重质油国家实验室CNPC催化重点实验室,山东青岛255666

出　　处：《燃料化学学报》2009年第3期330-334,共5页Journal of Fuel Chemistry and Technology

基　　金：重质油国家重点实验室应用基础研究项目;教育部创新团队“重质油高效转化的绿色化学与工程”项目

摘　　要：采用NiMoP浸渍液浸渍载体γ-Al2O3制备了不同磷含量的NiMoP/Al2O3加氢处理催化剂。为了研究磷对该系列催化剂活性相结构的影响,用二苯并噻吩(DBT)和喹啉为模型化合物,考察了催化剂的加氢脱硫(HDS)和加氢脱氮(HDN)性能。结果表明,添加适当的磷能够提高催化剂的HDS和HDN活性,但是高含量的磷能显著的降低催化剂的催化性能。通过对催化剂进行XRD和HRTEM表征发现,添加磷能够增加MoS2的堆积层数以及Ⅱ型"Ni-Mo-S"相的相对含量,这是因为在制备过程中添加磷降低了活性组分与载体之间的相互作用。NiMoP/Al2O3 hydrotreating catalysts with different phosphorus contents were prepared by impregnating NiMoP aqueous solution into γ-Al2O3. The hydrodesulfurization （HDS）and hydrodenitrogenation （HDN） performances of the catalysts were evaluated using the model compounds dibenzothiophene and quinoline methylbenzene. The results show that the HDS and HDN performances of the catalysts can be improved by adding moderate quantities of phosphorus in the catalysts, and its performance can be decreased markedly when the catalysts have high phosphorus content. The catalysts were investigated by means of XRD and high-resolution transmission electron microscopy （HRTEM） to get a better understanding of the nature of active. The results of XRD and HRTEM characterizations indicate that the number of stacked layers of active component MoS2 increases with the increase of the phosphorus content. Because the interaction between active component and carrier γ-Al2O3 is weakened by adding phosphorus into the catalysts, the relative content of type-Ⅱ“Ni-Mo-S”phase is increased.

关 键 词：NiMoP/Al2O3 加氢处理催化剂 活性相 高分辨透射电镜(HRTEM) 

分 类 号：TE624.4[石油与天然气工程—油气加工工程]