Abstract
Hydrodesulfurization of thiophene over reduced nickel Y zeolite (Ni°Y) was carried out using apulse reactor. Ni°Y manifested high catalytic activity for hydrodesulfurization of thiophene at 400°C, and the hydrocarbons produced included methane, ethylene, propylene, butenes. Infrared spectra of Ni°Y reduced by hydrogen indicated the formation of new acidic hydroxyl groups, i.e., Bronsted acid sites, on the Ni°Y surface. However, no remarkable change in the acidity of Ni°Y by sulfiding with hydrogen sulfide was apparent in the i.r. spectra. It was assumed that the surface structure of Ni°Y in the hydrodesulfurization reaction was analogous to that of the nickel sulfide catalyst supported on hydrogen Y zeolite like NiS/HY. The hydrodesulfurization mechanism of thiophene involving both nickel sulfide and Bronsted acid site on the catalyst was also discussed.
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