title: Influence of Catalyst Acid/Base Properties in Acrolein Production by Oxidative Coupling of Ethanol and Methanol.
abstract: Oxidative coupling of methanol and ethanol represents a new route to produce acrolein. In this work, the overall reaction was decoupled in two steps, the oxidation and the aldolization, by using two consecutive reactors to investigate the role of the acid/base properties of silica-supported oxide catalysts. The oxidation of a mixture of methanol and ethanol to formaldehyde and acetaldehyde was performed over a FeMoOxcatalyst, and then the product mixture was transferred without intermediate separation to a second reactor, in which the aldol condensation and dehydration to acrolein were performed over the supported oxides. The impact of the acid/base properties on the selectivity towards acrolein was investigated under oxidizing conditions for the first time. The acid/base properties of the catalysts were investigated by NH3-, SO2-, and methanol-adsorption microcalorimetry. A MgO/SiO2catalyst was the most active in acrolein production owing to an appropriate ratio of basic to acidic sites.
authors.affiliation: IRCELYON, UMR 5256 CNRS- Université Lyon 1, 2 avenue Albert Einstein, 69626-, Villeurbanne cedex, France.
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Lilić
authors.affiliation: IRCELYON, UMR 5256 CNRS- Université Lyon 1, 2 avenue Albert Einstein, 69626-, Villeurbanne cedex, France.
authors.forename: Simona
authors.initials: S
authors.lastname: Bennici
authors.affiliation: ARKEMA, Centre de Recherche Rhône Alpes, 69493, Pierre Bénite, Cedex, France.
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Devaux
authors.affiliation: ARKEMA, Direction Recherche & Développement, 420 Rue d'Estienne d'Orves, 92705, Colombes, France.
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Dubois
authors.affiliation: IRCELYON, UMR 5256 CNRS- Université Lyon 1, 2 avenue Albert Einstein, 69626-, Villeurbanne cedex, France.
authors.forename: Aline
authors.identifier: 0000-0002-3063-3445
authors.initials: A
authors.lastname: Auroux
mesh_terms: D000171:Acrolein / Q000138:chemical synthesis*; D002384:Catalysis; D000431:Ethanol / Q000737:chemistry*; D008277:Magnesium Oxide; D000432:Methanol / Q000737:chemistry*; D058451:Oxidative Coupling; D012822:Silicon Dioxide
chemical_list: D008277:Magnesium Oxide; D000431:Ethanol; D012822:Silicon Dioxide; D000171:Acrolein; D000432:Methanol
keywords: acidity; alcohols; aldol reaction; basicity; calorimetry