Synthesis, characterization and evaluation of unsupported porous NiS 2 sub-micrometer spheres as a potential hydrodesulfurization catalyst

From National Research Council Canada

DOI	Resolve DOI: https://doi.org/10.1016/j.apcata.2012.10.030
Author	Search for: Mondal, D.¹; Search for: Villemure, G.; Search for: Li, G.¹; Search for: Song, C.¹; Search for: Zhang, J.¹; Search for: Hui, R.¹; Search for: Chen, J.; Search for: Fairbridge, C.
Affiliation	National Research Council of Canada. Energy, Mining and Environment
Format	Text, Article
Subject	Adsorption/desorption; Colloidal silica; Dibenzothiophenes; Direct synthesis; Energy dispersive X ray spectroscopy; First-order reaction rate constant; HDS of DBT; Hydrodesulfurization catalysts; Model compound; Nano-structured; Porous structures; Silica removal; Single phase; Single-step; Special properties; Submicrometers; Surface area; Ultrasonic spray pyrolysis; XRD; Rate constants; Scanning electron microscopy; Silica; Spray pyrolysis; Transmission electron microscopy; X ray diffraction; X ray spectroscopy; Hydrodesulfurization
Abstract	Nanostructured NiS2 has attracted interest due to its wide applications and special properties. Synthesis of a pure phase NiS2 in a single step has been a challenge. In this work, a new method for direct synthesis of uniform NiS2/SiO2 sub microspheres has been developed by ultrasonic spray pyrolysis. Colloidal silica was used as a sacrificial template to create the porous structure. After silica removal, hollow, porous NiS2 nano spheres were obtained. The product was characterized by using scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction (XRD), transmission electron microscopy and N2 adsorption/desorption isotherm. XRD confirmed the formation of single phase pyrite NiS2. It was found that the porous spherical NiS2 has a surface area of ca. 300 m2 g-1. The HDS catalytic activity of NiS2 was evaluated using a model compound, dibenzothiophene (DBT). It showed a first order reaction rate constant of 1.51 × 10-4 s-1 g cata-1 at 320 °C for HDS of DBT, which is significantly promising for further exploration. © 2012 Published by Elsevier B.V.
Publication date	2013
In	Applied Catalysis A: General 450 (2013): 230–236.
Language	English
Peer reviewed	Yes
NPARC number	21269844
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Record identifier	a7832f6f-46bb-46fc-ad12-8f516fe2ded6
Record created	2013-12-13
Record modified	2020-04-22

Date modified:: 2024-04-19