Mesoporous Zeolite ZSM-5 Supported Ni2P Catalysts with High Activity in the Hydrogenation of Phenanthrene and 4,6-Dimethyldibenzothiophene

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• 作者：Wenqian Fu ; Lei Zhang ; Dongfang Wu ; Quanyong Yu ; Ting Tang ; Tiandi Tang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：July 6, 2016
• 年：2016
• 卷：55
• 期：26
• 页码：7085-7095
• 全文大小：637K
• 年卷期：0
• ISSN：1520-5045

文摘

Mesoporous zeolite ZSM-5 (ZSM-5-M) was synthesized and used as support for the preparation of highly efficient nickel phosphide catalyst (Ni₂P/ZSM-5-M) in the deep hydrogenation of phenanthrene and in the hydrodesulfurization (HDS) of 4,6-dimethyldibenzothiophene (4,6-DM-DBT). Compared with Ni₂P catalysts supported silica and high surface area hexagonal mesoporous silica (HMS) (Ni₂P/SiO₂ and Ni₂P/HMS), Ni₂P/ZSM-5-M exhibits higher hydrogenation and HDS activity. The phenanthrene conversion and deep hydrogenation products selectivity over Ni₂P/ZSM-5-M (95% and 83%) are much higher than those over Ni₂P/SiO₂ (61% and 73%) and Ni₂P/HMS (69% and 45%) under mild conditions. The 4,6-DM-DBT conversion over Ni₂P/ZSM-5-M (93%) was higher than that over Ni₂P/SiO₂ (62%). This feature is attributed to the difference in surface properties of support. A large amount of acidic hydroxyl groups on the zeolites can interact strongly with catalyst precursor, resulting in the formation of highly dispersed Ni₂P particles with small sizes, which provide abundant hydrogenation active sites.