Synthesis of acrolein by oxidative coupling of alcohols over spinel catalysts: microcalorimetric and spectroscopic approaches

Oxidative coupling of methanol and ethanol is becoming a promising alternative to produce sustainable acrolein. In this work, the reaction has been performed in two successive reactors (for oxidation and aldolization respectively) in order to study the role of the acid/base properties of spinel cata...

Full description

Saved in:
Bibliographic Details
Published in:Catalysis science & technology 2020-01, Vol.1 (6), p.1889-191
Main Authors: Folliard, Vincent, Postole, Georgeta, Marra, Livia, Dubois, Jean-Luc, Auroux, Aline
Format: Article
Language:English
Subjects:
Acetaldehyde
Acrolein
Adsorption
Aldehydes
Aluminum
Ammonia
Catalysis
Catalysts
Chemical Sciences
Coupling
Disproportionation
Environment and Society
Environmental Sciences
Ethanol
Formaldehyde
Magnesium
Methanol
Oxidation
Spinel
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Oxidative coupling of methanol and ethanol is becoming a promising alternative to produce sustainable acrolein. In this work, the reaction has been performed in two successive reactors (for oxidation and aldolization respectively) in order to study the role of the acid/base properties of spinel catalysts with various Al/Mg ratios. The acid/base properties of catalysts were investigated by NH 3 and SO 2 adsorption microcalorimetry. To deeply investigate the adsorption mechanism of the reactants on the catalysts, other adsorption microcalorimetry studies coupled to FTIR were performed using methanol, formaldehyde, acetaldehyde and propionaldehyde. Catalytic results were correlated to FTIR spectra and revealed the disproportionation of formaldehyde. Co-adsorption of aldehydes was also investigated by FTIR showing a preferential adsorption of formaldehyde compared to acetaldehyde. The different species resulting from aldehyde adsorption are discussed. Oxidative coupling of methanol and ethanol is becoming a promising alternative to produce sustainable acrolein.
ISSN:2044-4753
2044-4761
DOI:10.1039/d0cy00094a