Citation: ZHANG Jin-ling, SONG Chun-min, WANG Yan-zhen, DUAN Hong-ling. Preparation of Co-Mo/SiO₂-Al₂O₃ catalyst for hydrotreating lubricating oil[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(5): 543-550. shu

Preparation of Co-Mo/SiO₂-Al₂O₃ catalyst for hydrotreating lubricating oil

College of Chemical Engineering, China University of Petroleum(East China), Qingdao 266580, China

Corresponding author: WANG Yan-zhen, yanzhenw@upc.edu.cn
Received Date: 15 December 2017
Revised Date: 12 March 2018

Figures(12)

SiO₂-Al₂O₃, with a mass content of 5%, 10% and 15%, was synthesized by using a Al(NO₃)₃-NaAlO₂ double hydrolysis method, with surfactant Pluronic P₁₂₃ as template and Si(OC₂H₅)₄ as Si source. The Co-Mo/SiO₂-Al₂O₃ hydrotreating catalysts for lubricating oil were then prepared by co-impregnation method and characterized by a series of techniques such as XRD, N₂ sorption, Py-FTIR, NH₃-TPD, H₂-TPR, TEM and XRF. The results show that the SiO₂-Al₂O₃ support containing 10% Si is provided with abundant moderate-strong acid sites and partially ordered mesoporous structure; MoS₂ particles are uniformly dispersed on the SiO₂-Al₂O₃ surface. Moreover, the Co-Mo/10%SiO₂-Al₂O₃ catalyst 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-Al₂O₃ exceed 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.
- SiO₂-Al₂O₃ support,
- Co-Mo catalyst,
- lubricating oil,
- hydrotreating
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Preparation of Co-Mo/SiO₂-Al₂O₃ catalyst for hydrotreating lubricating oil