Synthesis of Methyl Mercaptan on Mesoporous Alumina Prepared with Hydroxysafflor Yellow A as Template: The Synergistic Effect of Potassium and Molybdenum
K-promoted Mo-based catalysts showed great promise for the hydrogenation of CS<sub>2</sub> to methyl mercaptan (CH<sub>3</sub>SH). However, the research on the synergistic effect of K and Mo, and the active site of CS<sub>2</sub> hydrogenation to CH<sub>3<...
Guardado en:
| Autores principales: | , , , , , , , , , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/1b858a26c1b7438bb40675695efb7fee |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: | K-promoted Mo-based catalysts showed great promise for the hydrogenation of CS<sub>2</sub> to methyl mercaptan (CH<sub>3</sub>SH). However, the research on the synergistic effect of K and Mo, and the active site of CS<sub>2</sub> hydrogenation to CH<sub>3</sub>SH were unexplored widely. To solve this problem, the synergistic effect of K and Mo in the K-promoted Mo-based catalysts for CS<sub>2</sub> hydrogenation to prepare CH<sub>3</sub>SH was investigated. The mesoporous alumina was the support and loaded the active components potassium and molybdenum to prepare the catalyst. The results suggested that the active components K and Mo can not only cooperatively regulate the acid-base sites on the catalyst surface, but also stabilize the molybdate species at +5 valence during the reduction process and increase the Mo unsaturated coordination sites. Combined with the results of the catalytic activity evaluation, indicating that the main active site of the catalysts is the weak Lewis acid-base site, and the strong acidic site and strong alkaline site are not conducive to the formation of CH<sub>3</sub>SH. Moreover, the possible catalytic mechanism of CS<sub>2</sub> hydrogenation to CH<sub>3</sub>SH on the weak Lewis acid-base sites of the catalysts was proposed. The research results of this paper can provide an experimental basis and theoretical guidance for the design of high-performance CH<sub>3</sub>SH synthesis catalyst and further mechanism research. |
|---|