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

Published online by Cambridge University Press:  13 November 2018

Anabel D. Delgado ,
Lorena Alvarez Contreras Open the ORCID record for Lorena Alvarez Contreras [Opens in a new window] ,
Karen A. Beltrán  and
Alfredo Aguilar Elguezabal
Anabel D. Delgado
Affiliation:
Departamento de Ingeniería y Química de Materiales, Centro de Investigacion de Materiales Avanzados, Chihuahua 31136, México
Lorena Alvarez Contreras*
Affiliation:
Departamento de Ingeniería y Química de Materiales, Centro de Investigacion de Materiales Avanzados, Chihuahua 31136, México
Karen A. Beltrán
Affiliation:
Departamento de Ingeniería y Química de Materiales, Centro de Investigacion de Materiales Avanzados, Chihuahua 31136, México
Alfredo Aguilar Elguezabal
Affiliation:
Departamento de Ingeniería y Química de Materiales, Centro de Investigacion de Materiales Avanzados, Chihuahua 31136, México
*
a)Address all correspondence to this author. e-mail: [email protected]
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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.

Keywords

catalyticchemical synthesisnanoscale
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 21: Focus Issue: Catalytic Engineered Materials for Commercial and Industrial Energy Applications , 14 November 2018 , pp. 3646 - 3655
Copyright
Copyright © Materials Research Society 2018 

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