MgO-La2O3 catalysts with different Mg/La molar ratio were synthesized by a precipitation method and a subsequent calcination and then characterized by x-ray diffraction, N2 adsorption-desorption isotherms (at - 196◦C), CO2- and NH3-thermoprogrammed desorption and x-ray photoelectronic spectroscopy. The coexistence of acid and basic sites promoted the selective transformation of ethanol into valuable products. Thus, MgO catalyst promoted the Guerbet reaction obtaining n-butanol as product while the incorporation of La2O3 in the catalytic system improved the ethanol conversion notably, obtaining ethylene as the main product due to a dehydration reaction. The highest ethylene yield was obtained for the catalyst with a Mg/La molar ratio of 1.
On the selective transformation of ethanol over Mg- and/or La-containing mixed oxides catalysts / Ballesteros Plata, D.; Balestra, G.; Cecilia, J.A.; Barroso Martín, I.; Infantes-Molina, A.; Tabanelli, T.; Cavani, F.; López Nieto, J.M.; Montaña, M.; Rodríguez Castellón, E.. - In: CATALYSIS TODAY. - ISSN 0920-5861. - ELETTRONICO. - 429:(2024), pp. 114470.1-114470.11. [10.1016/j.cattod.2023.114470]
On the selective transformation of ethanol over Mg- and/or La-containing mixed oxides catalysts
Balestra, G.;Tabanelli, T.;Cavani, F.;
2024
Abstract
MgO-La2O3 catalysts with different Mg/La molar ratio were synthesized by a precipitation method and a subsequent calcination and then characterized by x-ray diffraction, N2 adsorption-desorption isotherms (at - 196◦C), CO2- and NH3-thermoprogrammed desorption and x-ray photoelectronic spectroscopy. The coexistence of acid and basic sites promoted the selective transformation of ethanol into valuable products. Thus, MgO catalyst promoted the Guerbet reaction obtaining n-butanol as product while the incorporation of La2O3 in the catalytic system improved the ethanol conversion notably, obtaining ethylene as the main product due to a dehydration reaction. The highest ethylene yield was obtained for the catalyst with a Mg/La molar ratio of 1.| File | Dimensione | Formato | |
|---|---|---|---|
|
1-s2.0-S0920586123004947-main.pdf
accesso aperto
Tipo:
Versione (PDF) editoriale
Licenza:
Licenza per Accesso Aperto. Creative Commons Attribuzione - Non commerciale - Non opere derivate (CCBYNCND)
Dimensione
3.69 MB
Formato
Adobe PDF
|
3.69 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
