Preparation of highly dispersed desulfurization catalysts and their catalytic performance in hydrodesulfurization of dibenzothiophene

• Published in: Chinese journal of catalysis Vol. 37; no. 3; pp. 412 - 419
• Main Authors: Hao, Liang, Xiong, Guang, Liu, Liping, Long, Huayun, Jin, Fengying, Wang, Xiangsheng
• Format: Journal Article
• Language: Chinese
• Published: 01.03.2016
• Subjects: Aluminum; Catalysis; Catalysts; Dibenzothiophene; Dispersion; Oxides; Phases; Sulfides
• ISSN: 0253-9837
• DOI: 10.1016/S1872-2067(15)61017-8

Micro-mesoporous ZK-1 molecular sieves with different Si/Al ratios were used as supports for binary Co-Mo hydrodesulfurization (HDS) catalysts. The CoMo/ZK-1 catalysts were prepared using an over-loading impregnation method, and characterized using N2 physisorption, X-ray diffraction, temperature-programmed NH3 desorption, temperature-programmed reduction (TPR), ultraviolet-visible diffuse reflectance spectroscopy, and high-resolution transmission electron microscopy (HRTEM). The results show that the CoMo/ZK-1 catalysts have high surface areas ( similar to 700 m2/g), large pore volumes, and hierarchical porous structures, which promote the dispersion of Co and Mo oxide phases on the ZK-1 supports. The TPR results show that the interactions between the Co and Mo oxide phases and the ZK-1 support are weaker than those in the CoMo/ gamma -Al2O3 catalyst. The HRTEM results show that the CoMo/ZK-1 catalysts have better MoS2 dispersion and more active edge sites. The catalysts were tested in HDS of dibenzothiophen