Mesoporous Zeolite ZSM-5 Supported Ni2P Catalysts with High Activity in the Hydrogenation of Phenanthrene and 4,6-Dimethyldibenzothiophene
Mesoporous Zeolite ZSM-5 Supported Ni2P Catalysts with High Activity in the Hydrogenation of Phenanthrene and 4,6-Dimethyldibenzothiophene
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DOI：
10.1021/acs.iecr.6b01583
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发表时间：
2016-07-06
影响因子：
4.2
通讯作者：
Tang, Tiandi
中科院分区：
文献类型：
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作者：
Fu, Wenqian;Zhang, Lei;Tang, Tiandi
合成了介孔分子筛ZSM-S (ZSM-S- m)，并将其作为载体用于制备高效磷化镍催化剂Ni2P/ZSM-S- m，用于菲的深度加氢和4,6-二甲基二苯并噻吩（4,6- dm - dbt）的加氢脱硫。与负载二氧化硅和高表面积六方介孔二氧化硅（Ni2P/SiO2和Ni2P/HMS）的Ni2P催化剂相比，Ni2P/ZSM-S-M具有更高的加氢活性和HDS活性。在温和条件下，Ni2P/ZSM-S-M对菲转化和深度加氢产物的选择性分别为95%和83%，远高于Ni2P/SiO2（61%和73%）和Ni2P/HMS（69%和4S%）。在Ni2P/ZSM-5-M上的4,6- dm - dbt转化率（93%）高于Ni2P/SiO2上的（62%）。这一特点归因于支撑体表面特性的差异。沸石上大量的酸性羟基与催化剂前驱体发生强烈的相互作用，形成高度分散的小尺寸Ni2P颗粒，提供了丰富的加氢活性位点。
Mesoporous zeolite ZSM-S (ZSM-S-M) was synthesized and used as support for the preparation of highly efficient nickel phosphide catalyst (Ni2P/ZSM-S-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-S-M exhibits higher hydrogenation and HDS activity. The phenanthrene conversion and deep hydrogenation products selectivity over Ni2P/ZSM-S-M (95% and 83%) are much higher than those over Ni2P/SiO2 (61% and 73%) and Ni2P/HMS (69% and 4S%) 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.