Citation: Liang Hao, Guang Xiong, Liping Liu, Huayun Long, Fengying Jin, Xiangsheng Wang. Preparation of highly dispersed desulfurization catalysts and their catalytic performance in hydrodesulfurization of dibenzothiophene[J]. Chinese Journal of Catalysis, ;2016, 37(3): 412-419. doi: 10.1016/S1872-2067(15)61017-8 shu

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

1.
State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

Corresponding author: Liping Liu,
Received Date: 15 October 2015
Available Online: 12 November 2015
Fund Project: 国家自然科学基金(21206017). (21206017)

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 N₂physisorption, 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 (~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/γ-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 dibenzothiophene. Under mild reaction conditions, the activity of Co and Mo sulfides supported on ZK-1 was higher than those of Co and Mo sulfides supported on ZSM-5, AlKIT-1, and γ-Al₂O₃.
- Micro-mesoporous molecular sieve,
- ZK-1,
- Hydrodesulfurization,
- Dibenzothiophene
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