| Autor: |
Mazarío, Jaime, Jampaiah, Deshetti, Concepción, Patricia, Villasante-Iturria, Pablo, Wilson, Karen, Lee, Adam, Domine, Marcelo E. |
| Zdroj: |
Catalysis Science & Technology; 2024, Vol. 14 Issue: 14 p3878-3892, 15p |
| Abstrakt: |
The selective dehydration of glycerol to hydroxyacetone (acetol) was studied in a continuous flow fixed-bed reactor with CuO supported on monoclinic (m-) or tetragonal (t-) ZrO2nanoparticles. Catalysts were characterised by ICP, N2physisorption, powder XRD, HR-TEM and SEM-EDS, N2O titration, and NH3- and CO2-TPD. Quasi-in situXPS reveals the impact of zirconia phase on copper speciation, with m-ZrO2preferentially stabilising Cu(i) species, whose presence correlates with enhanced catalytic performance. In situFTIR of 1,2-propanediol and glycerol evidenced Cu(i) promote desorption of a CO containing intermediate. Solvent selection strongly influenced catalyst reactivity, with methanol less prone to competitive adsorption than water, and favouring the genesis of Cu(i) species. Cu/m-ZrO2achieved 60% yield of the desired acetol at 240 °C, maintaining ≥50% yield over three consecutive regeneration cycles, being one of the most efficient catalysts based on earth abundant metals for continuous glycerol dehydration to acetol under the present conditions. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
