Artículo
Understanding the formation of higher alcohols in the liquid-phase ethanol condensation over copper-loaded hydrotalcite-derived mixed oxides
Autor/es | Faba, Laura
Cueto, Jennifer Portillo, María Ángeles Villanueva Perales, Ángel Luis Vidal Barrero, Fernando Ordóñez, Salvador |
Departamento | Universidad de Sevilla. Departamento de Ingeniería Química y Ambiental |
Fecha de publicación | 2023-11 |
Fecha de depósito | 2024-02-05 |
Publicado en |
|
Resumen | The production of higher alcohols (C≥4) via ethanol liquid-phase condensation over different Cu-based catalysts is studied in this work. Experimental results demonstrate that dehydrogenation steps are more relevant than ... The production of higher alcohols (C≥4) via ethanol liquid-phase condensation over different Cu-based catalysts is studied in this work. Experimental results demonstrate that dehydrogenation steps are more relevant than hydrogenation steps, according to the lack of improvement in activity when a bimetallic (Pd-Cu) catalyst. Thus, the sequential hydrogenation via Meerwein-Ponndorf-Verley (MPV) and surface-mediated H-transfer is identified as active enough to obtain the desired alcohols. The best results were obtained with a 20 % Cu/MgAl catalyst, showing more than 10 % of ethanol conversion (free solvent conditions) and 60 % selectivity to higher alcohols (16 % to C6 and C8 ones). Experiments with different feed compositions, including C4 alcohols and acetaldehyde, and a comprehensive analysis of all the results in terms of a mechanistic oligomerization model, demonstrate that the C-C coupling follows a step-growth model where the condensation between monomers coexists with the one involving oligomers. © 2023 The Authors |
Agencias financiadoras | Junta de Andalucía European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) |
Identificador del proyecto | BIOC4+(PY18-RE-0040) |
Cita | -aba, L., Cueto, J., Portillo, M.Á., Villanueva-Perales, Á.L., Vidal-Barrero, F. y Ordóñez, S. (2023). Understanding the formation of higher alcohols in the liquid-phase ethanol condensation over copper-loaded hydrotalcite-derived mixed oxides. Catalysis Today, 423, 114297. https://doi.org/10.1016/j.cattod.2023.114297. |
Ficheros | Tamaño | Formato | Ver | Descripción |
---|---|---|---|---|
CT_2023_Faba_Vidal-Barrero_Und ... | 1.095Mb | [PDF] | Ver/ | |