Synthesis and Characterization of NiMoS/TiMg and NiWS/TiMg Nanocatalysts and Their Application in the Hydrodesulfurization of Dibenzothiophene

IF 2.8 3区化学 Q2 CHEMISTRY, APPLIED

Topics in Catalysis Pub Date : 2024-03-12 DOI:10.1007/s11244-024-01916-w

P. Peña-Obeso, M. E. Cervantes-Gaxiola, J. L. Rico, J. N. Díaz de León, S. Guevara-Martinez, J. A. Lumbreras-Pacheco, R. Huirache-Acuña

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Abstract

NiMoS/TiMg and NiWS/TiMg nanocatalysts were synthesized, characterized by various techniques and tested in the hydrodesulphurization (HDS) of dibenzothiophene (DBT). TiMg mixed oxides containing 5, 10 or 15 wt% of MgO were prepared by sol–gel and then used as catalyst supports. A constant atomic ratio of Ni/(Ni + M) = 0.5 was kept for all the catalysts (M = Mo or W). The catalysts were first prepared by sequential-wet impregnation. Then, after an ex-situ sulfidation process, they were characterized by high resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD), and physisorption of N₂ following the BET method. The presence of MgO in the NiMoS/TiMg and NiWS/TiMg catalysts resulted in an enhancement in the HDS activity of DBT. In addition, their HDS activities were higher than those observed in the NiMoS/Ti and NiWS/Ti catalysts. Furthermore, higher HDS activity was found for the NiMoS/TiMg compared with their NiWS/TiMg catalysts counterpart.

Graphical Abstract

Abstract Image

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NiMoS/TiMg 和 NiWS/TiMg 纳米催化剂的合成与表征及其在二苯并噻吩氢化脱硫中的应用

通过各种技术合成了 NiMoS/TiMg 和 NiWS/TiMg 纳米催化剂，并对其进行了二苯并噻吩（DBT）加氢脱硫（HDS）试验。采用溶胶-凝胶法制备了含 5、10 或 15 wt% 氧化镁的钛镁混合氧化物，并将其用作催化剂载体。所有催化剂（M = Mo 或 W）的原子比恒定为 Ni/(Ni + M) = 0.5。催化剂首先通过顺序湿浸渍法制备。然后，在原位硫化过程之后，用高分辨率透射电子显微镜（HR-TEM）、X 射线衍射（XRD）和 BET 法对 N2 进行物理吸附。NiMoS/TiMg 和 NiWS/TiMg 催化剂中氧化镁的存在提高了 DBT 的加氢脱硫活性。此外，与 NiMoS/Ti 和 NiWS/Ti 催化剂相比，它们的加氢脱硫活性更高。此外，与 NiWS/TiMg 催化剂相比，NiMoS/TiMg 催化剂的加氢脱硫活性更高。

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来源期刊

Topics in Catalysis 化学-物理化学

CiteScore

5.70

自引率

5.60%

发文量

197

审稿时长

2 months

期刊介绍： Topics in Catalysis publishes topical collections in all fields of catalysis which are composed only of invited articles from leading authors. The journal documents today’s emerging and critical trends in all branches of catalysis. Each themed issue is organized by renowned Guest Editors in collaboration with the Editors-in-Chief. Proposals for new topics are welcome and should be submitted directly to the Editors-in-Chief. The publication of individual uninvited original research articles can be sent to our sister journal Catalysis Letters. This journal aims for rapid publication of high-impact original research articles in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.