摘要
Abstract
SiO2-Al2O3,with a mass content of 5%,10% and 15%, was synthesized by using a Al(NO3)3-NaAlO2double hydrolysis method,with surfactant Pluronic P123as template and Si(OC2H5)4as Si source. The Co-Mo/SiO2-Al2O3hydrotreating catalysts for lubricating oil were then prepared by co-impregnation method and characterized by a series of techniques such as XRD, N2sorption, Py-FTIR, NH3-TPD, H2-TPR, TEM and XRF. The results show that the SiO2-Al2O3support containing 10% Si is provided with abundant moderate-strong acid sites and partially ordered mesoporous structure;MoS2particles are uniformly dispersed on the SiO2-Al2O3surface. Moreover,the Co-Mo/10% SiO2-Al2O3catalyst exhibits high amount of Bronsted acid sites and type II CoMoS active phase. The catalytic performance was evaluated in a high-pressure fixed-bed reactor,with second vacuum side distillate oil as the raw material oil. The results show that the Co-Mo/10% SiO2-Al2O3 catalyst exhibits high activity in hydrotreating and paraffins and cycloalkanes are the main components in product oil. Under 380℃,15 MPa,a space velocity of 0.6 h-1,and a hydrogen to oil ratio of 1000,the HDS and HDN values over Co-Mo/10% SiO2-Al2O3exceed 99%. Meanwhile, the contents of S and N in the product are less than 10 and 2 μg/g, respectively, which can meet the requirements on the raw materials for the subsequent isomerization dewaxing process.关键词
SiO2-Al2O3载体/Co-Mo催化剂/润滑油/加氢处理Key words
SiO2-Al2O3support/Co-Mo catalyst/lubricating oil/hydrotreating分类
能源科技
