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Effect of the SiO2 support morphology on the hydrodesulfurization performance of NiMo catalysts

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Abstract

To study the effects of the support morphology on the hydrodesulfurization (HDS) activity of NiMoS catalysts, ordered mesoporous SiO2 (KIT-6) and nonporous nanospheres of SiO2 were used as supports. Metal species (Ni and Mo) were incorporated through a sequential impregnation technique. The aqueous solution of nickel nitrate was introduced first on the supports, followed by the solution of ammonium molybdate. Subsequently, a sulfidation treatment was carried out in gaseous H2S/H2 atmosphere. The NiMo/Al2O3 commercial catalyst was used as reference. The materials obtained were characterized by N2 physisorption, X-ray diffraction (XRD), and high-resolution transmission electron microscopy (HRTEM) and evaluated in the HDS catalytic reaction of dibenzothiophene in a batch reactor. The results indicate that the textural properties of KIT-6 were the key factors to obtain disperse NiMoS stacks, and a better metal sulfidation, which lead to a higher catalytic activity of the NiMo/KIT-6 catalyst (twice as active) compared to the NiMo/Nanosilica catalyst. In addition, the activity of the NiMo/KIT-6 catalyst was also superior to that obtained for the commercial catalyst.

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ACKNOWLEDGMENTS

The authors gratefully acknowledge the Mexican Council of Science and Technology (CONACYT) and the Energy Department (SENER) for supporting this work through the projects CONACYT-SENER-Hidrocarburos No. 120135. In addition, the authors acknowledge the excellent work of César Leyva Porras, Carlos Elías Ornelas Gutiérrez, Francisco Enrique Longoria Rodríguez, Luis Gerardo Silva Vidaurri, and Luis de la Torre Saenz for their technical assistance in this work.

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  1. Departamento de Ingeniería y Química de Materiales, Centro de Investigacion de Materiales Avanzados, Chihuahua, 31136, México

    Anabel D. Delgado, Lorena Alvarez Contreras, Karen A. Beltrán & Alfredo Aguilar Elguezabal

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  1. Anabel D. Delgado
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  2. Lorena Alvarez Contreras
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Correspondence to Lorena Alvarez Contreras.

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Delgado, A.D., Contreras, L.A., Beltrán, K.A. et al. Effect of the SiO2 support morphology on the hydrodesulfurization performance of NiMo catalysts. Journal of Materials Research 33, 3646–3655 (2018). https://doi.org/10.1557/jmr.2018.382

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