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

doi:10.1016/S1872-2067(15)61017-8

Abstract

Abstract:

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.

Key words: Micro-mesoporous molecular sieve, ZK-1, Hydrodesulfurization, Dibenzothiophene

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.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(15)61017-8

https://www.cjcatal.com/EN/Y2016/V37/I3/412

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