载体性质对NiMo催化剂活性相结构及1-甲基萘加氢饱和性能的影响  

Effect of Carrier Properties on Active Phase Structure and 1-MethylnaphthaleneHydrogenation Saturation Performance of NiMo Catalyst

作　　者：石明亮 杨平 杨清河 聂红 刘清河 李会峰 SHI Mingliang;YANG Ping;YANG Qinghe;NIE Hong;LIU Qinghe;LI Huifeng(SINOPEC Research Institute of Petroleum Processing Co.,Ltd.,Beijing 100083,China)

机构地区：[1]中石化石油化工科学研究院有限公司,北京100083

出　　处：《石油学报（石油加工）》2024年第3期602-609,共8页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家重点研发计划项目(2021YFA1501204)基金资助。

摘　　要：通过在载体成型过程中引入纤维素A作为改性剂,并调变纤维素A与胶溶剂硝酸的比例,获得5种性质不同的载体,然后采用孔饱和浸渍和低温络合工艺制备相应催化剂。利用N 2吸附-脱附、压汞、红外羟基、后萃取实验、X射线光电子能谱、透射电子显微镜等表征手段深入分析了载体的孔结构与表面性质、催化剂加氢活性相的结构与形貌,并选择1-甲基萘为模型化合物评价催化剂的加氢饱和性能。结果表明:随着纤维素A比例的增加,载体的孔体积增大且超大孔比例提高;载体表面羟基数量减少且与活性金属发生强相互作用的碱性羟基和中性羟基比例降低,催化剂硫化后形成更多的NiMoS相和多层堆叠的MoS 2片晶。纤维素A的引入,调变了金属与载体的相互作用并促进形成更多高活性的加氢活性相结构,同时构筑了利于反应物扩散的大孔,提高了1-甲基萘加氢饱和反应活性。By introducing cellulose A as a modifier in the carrier forming process and adjusting the proportion of cellulose A to adhesive solvent nitric acid,five carriers with different properties were obtained;further more,the corresponding catalysts were prepared by pore saturation impregnation and low temperature complexation process.The pore structure and surface properties of the carrier,the structure and morphology of the hydrogenation active phase of the catalyst were analyzed by N 2 adsorption-desorption,mercury intrusion,IR spectroscopy of OH groups,post-extraction experiment,X-ray photoelectron spectroscopy and transmission electron microscopy.Besides,1-methylnaphthalene was selected as a model compound to evaluate the hydrogenation saturation performance of the catalyst.The results show that with the increasing proportion of cellulose A,the pore volume and the proportion of extra large pores of the carrier increases;the amount of OH groups on the carrier surface and the proportion of basic OH groups and neutral OH groups that strongly interact with active metal also decrease;the sulfided catalyst forms more NiMoS phases and multi-layer stacked MoS 2 lamellar crystals.The introduction of cellulose A can adjust the interaction between the metal and carrier,and form more high-activity hydrogenation active phase structures.Meanwhile,large pores conducive to reactant diffusion have been constructed,and improved the hydrogenation saturation reaction activity of 1-methylnaphthalene.

关 键 词：氧化铝 纤维素A 1-甲基萘 表面羟基 NiMo催化剂 催化加氢 

分 类 号：TQ426.9[化学工程]