燃料化学学报2018，Vol.46Issue(4)：441-450,10.
Co调变MoS2催化剂的作用本质及其FCC汽油选择性加氢脱硫机理
Essential role of promoter Co on the MoS2catalyst in selective hydrodesulfurization of FCC gasoline
摘要
Abstract
The essential role of Co on the MoS2catalyst in selective hydrodesulfurization(HDS) of FCC gasoline was investigated with ammonium tetrathiomolybdate supported on alumina modified with various amount of Co sulfide. According to the data obtained by XRD,HRTEM,XPS,H2-TPR and Py-FTIR analysis,the Co species could significantly affect the microstructure and composition proportion of the active phase,and thus induced the enormous differences in catalytic properties. The evaluation results demonstrated that the Co atoms tending to form the CoMoS phase as Co/Mo(atomic ratio)<0.2 could greatly improve the HDS activity,but slightly improve the hydrogenation (HYD) activity of olefins. The spillover hydrogen produced by the formation of Co9S8phase as 0.2<Co/Mo(atomic ratio)<0.6 greatly improved the HDS activity, but showed almost no effect on the HYD of olefins. The excess Co could inevitably form some large size Co9S8phase as Co/Mo(atomic ratio)>0.6, which would hinder the mutual contact of the reactants and the active sites,and thus lead to the decrease of the HDS activity and selectivity. The obtained results were useful for developing highly effective hydrotreating catalyst.关键词
选择性加氢脱硫/活性相/Co/Mo原子比/溢流氢Key words
selective hydrodesulfurization/active phase/Co/Mo atomic ratio/spillover hydrogen分类
化学化工引用本文复制引用
刘宾,刘蕾,柴永明,赵晋翀,刘晨光..Co调变MoS2催化剂的作用本质及其FCC汽油选择性加氢脱硫机理[J].燃料化学学报,2018,46(4):441-450,10.基金项目
The project was supported by the National Natural Science Foundation of China(U1662119,21776314),the National Key Research and Development Program of China(2017YFB0306600),the Shandong Provincial Natural Science Foundation of China(ZR2016BL22),the Qingdao Applied Basic Research Project(17-1-1-73-jch),the Fundamental Research Funds for the Central Universities(17CX02061)and the State Key Laboratory of Heavy Oil Processing(SLKZZ-2017005). （U1662119,21776314）
