Competitive Hydrodechlorination and Hydrodeazotization on Unsupported Sulfide Catalysts Synthesized in Situ

The catalytic activity of an unsupported nickel-promoted tungsten disulfide catalyst prepared in situ in the reaction medium was studied in the competitive hydrodechlorination of 1,4-dichlorobenzene and hydrodeazotization of quinoline. The morphology and phase composition of the catalyst were studie...

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Bibliographic Details
Published in:Chemistry and technology of fuels and oils 2024-11, Vol.60 (5), p.1129-1135
Main Authors: Dzhabarov, E. G., Petrukhina, N. N., Zakharyan, E. M., Kuz’min, V. D., Tumanyan, B. P.
Format: Article
Language:English
Subjects:
Catalysts
Catalytic activity
Chemical synthesis
Chemistry
Chemistry and Materials Science
Geotechnical Engineering & Applied Earth Sciences
Hydrodechlorination
Industrial Chemistry/Chemical Engineering
Kinetics and Catalysis
Mineral Resources
Nickel sulfide
Phase composition
Photoelectrons
Quinoline
Tungsten disulfide
X ray photoelectron spectroscopy
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Summary:The catalytic activity of an unsupported nickel-promoted tungsten disulfide catalyst prepared in situ in the reaction medium was studied in the competitive hydrodechlorination of 1,4-dichlorobenzene and hydrodeazotization of quinoline. The morphology and phase composition of the catalyst were studied by x-ray photoelectron spectroscopy and transmission electron microscopy. This study indicated the presence of nickel sulfide, nickel chloride and a mixed NiWS phase on the surface of the tungsten disulfide catalyst. A considerable decrease in catalyst activity was noted during the concurrent hydrodechlorination and hydrodeazotization reactions, leading to a decrease in the extent of hydrodechlorination of 1,4-dichlorobenzene. The loss of catalyst activity was attributed to the strong adsorption of nitrogen-containing compounds as well as the accumulation of quinolinium salts on the catalyst surface.
ISSN:0009-3092
1573-8310
DOI:10.1007/s10553-024-01775-x