Structure, stability and activity of RuS2 supported on alumina

The relationships between the structure attained by alumina-supported RuS2 during sulfidation, the extent of desulfurization of the sulfided phase during HDS, and the hydrodesulfurization activity of the catalyst were studied by TPS, TPR-S, XRD, FT-IR of CO, and DRS–UV–Vis–NIR. Sulfidation in H2S/N2...

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Bibliographic Details
Published in:Journal of catalysis 2008-11, Vol.260 (1), p.65-74
Main Authors: Castillo-Villalón, Perla, Ramírez, Jorge, Maugé, Françoise
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Chemical reactions
Chemistry
Exact sciences and technology
General and physical chemistry
Ru/Al2O3 catalysts
Ruthenium sulfide
Sulfur
Temperature
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Thiophene hydrodesulfurization
TPR-S
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Summary:The relationships between the structure attained by alumina-supported RuS2 during sulfidation, the extent of desulfurization of the sulfided phase during HDS, and the hydrodesulfurization activity of the catalyst were studied by TPS, TPR-S, XRD, FT-IR of CO, and DRS–UV–Vis–NIR. Sulfidation in H2S/N2 generates a mixture of RuS2-pyrite and RuS2-amorphous. As the sulfidation temperature increases, more RuS2-pyrite is produced at the expense of RuS2-amorphous. The later is not stable and undergoes reduction in reaction conditions, producing a sulfur-depleted catalyst (S/Ru
ISSN:0021-9517
1090-2694
DOI:10.1016/j.jcat.2008.08.015