- PII
- S3034560X25100146-1
- DOI
- 10.7868/S3034560X25100146
- Publication type
- Article
- Status
- Published
- Authors
- Volume/ Edition
- Volume 70 / Issue number 10
- Pages
- 1360-1365
- Abstract
- Liquid-phase hydrogenation of styrene at atmospheric pressure in an aqueous medium was studied on a series of supported nickel catalysts Ni/SiO with different nickel content (from 6 to 28 wt. %). The effect of textural characteristics of the catalysts and controlled deactivation with sulfide ions on the catalytic activity was studied. It was shown that with decreasing nickel content, dispersion increases, but the area of the active surface of the reduced metal decreases. Partial deactivation was simulated by introducing a controlled amount of NaS, which made it possible to quantitatively estimate the density and activity of different types of catalytic centers. It was found that for complete deactivation of one Ni atom on the surface, an average of 0.6 to 1.2 S anions are required, depending on the morphology of the catalyst. An analysis of the catalyst stability to the catalytic poison was performed based on the TOF and TON parameters. The obtained results expand the understanding of deactivation mechanisms and can be used in the development of new generation catalysts resistant to the action of sulfur-containing impurities in hydrogenation reactions.
- Keywords
- активная поверхность TOF дезактивация катализатора модификация поверхности катализатора
- Date of publication
- 01.10.2025
- Year of publication
- 2025
- Number of purchasers
- 0
- Views
- 63
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