NDLI: Effect of sulfidation process on catalytic performance over unsupported Ni-Mo-W hydrotreating catalysts

Content Provider	Springer Nature Link
Author	Yin, Changlong Wang, Yiyan
Copyright Year	2017
Abstract	Oxidic unsupported Ni-Mo-W catalysts were chosen to elucidate the effect of sulfidation conditions on the catalytic performance. The catalysts were sulfided in situ by using dimethyl sulfide as sulfiding agent. The relationships between the time needed for sulfidation and the sulfiding conditions were studied by GC-analysis method. Straight-run gas oil with high sulfur and nitrogen content was used to evaluate the hydrotreating performance. The oxidic catalyst precursors and sulfided catalysts were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS). With increasing sulfiding liquid hourly space velocity (LHSV) of the sulfiding agent, the reaction time necessary for the sulfidation decreased, while the activity of the catalyst increased significantly. The higher catalytic activity might be due to the MoS$_{2}$/WS$_{2}$ slabs with shorter length and higher stacking number, which might contribute to the catalyst with more active sites. Sulfiding at 330 °C took the longest sulfidation time, while the catalytic activity was also the highest after sulfiding at this temperature. Furthermore, within a certain range, the sulfidation pressure had no evident effect on the catalytic behavior or activity. The purpose of this work was to provide a basis for actual production and a reference for further research.
Starting Page	1004
Ending Page	1012
Page Count	9
File Format	PDF
ISSN	02561115
Journal	Korean Journal of Chemical Engineering
Volume Number	34
Issue Number	4
e-ISSN	19757220
Language	English
Publisher	Springer US
Publisher Date	2017-03-07
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sulfidation Unsupported Hydrotreating Catalysts Hydrodesulfurization NiMoW Catalyst Gas Oil Industrial Chemistry/Chemical Engineering Catalysis Materials Science Biotechnology
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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