Author, as appears in the article.: Tampieri A; Lilic M; Constantí M; Medina F

Department: Enginyeria Química

URV's Author/s: Constantí Garriga, Magdalena / Medina Cabello, Francisco / Tampieri, Alberto

Keywords: Waste Rehydration Rehydrated hydrotalcite Performance Microwave-assisted organic synthesis Liquid alkanes Layered double hydroxide Heterogeneous basic catalysis Green chemistry Fuels Feedstocks Depletion Chemicals Biomass Biofuel production

Abstract: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. The depletion of fossil fuel resources has prompted the scientific community to find renewable alternatives for the production of energy and chemicals. The products of the aldol condensation between bio-based furfural and acetone have been individuated as promising intermediates for the preparation of biofuels and polymeric materials. We developed a protocol for the microwave-assisted condensation of these two compounds over hydrotalcite-based materials. Mg:Al 2:1 hydrotalcite was prepared by co-precipitation; the obtained solid was calcined to afford the corresponding mixed metal oxide, which was then rehydrated to obtain a meixnerite-type material. The prepared solids were characterized by PXRD, ICP-AES, TGA-DSC and N2 physisorption, and tested as catalysts in the aldol condensation of acetone and furfural in a microwave reactor. The performance of the catalysts was assessed and compared; the meixnerite catalyst proved to be the most active, followed by the mixed metal oxide and the as-synthesized hydrotalcite, which has often been reported to be inactive. In all cases, the reaction is quite fast and selective, which makes our protocol useful for rapidly converting furfural and acetone into their condensation products.

Thematic Areas: Química Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) Materiais Inorganic chemistry General materials science General chemical engineering Crystallography Condensed matter physics Chemical engineering (miscellaneous) Chemical engineering (all) Biotecnología Astronomia / física

licence for use: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 20734352

Author's mail: francesc.medina@urv.cat magdalena.constanti@urv.cat alberto.tampieri@estudiants.urv.cat alberto.tampieri@estudiants.urv.cat

Author identifier: 0000-0002-3111-1542 0000-0002-3547-4199

Record's date: 2023-02-23

Papper version: info:eu-repo/semantics/publishedVersion

Link to the original source: https://www.mdpi.com/2073-4352/10/9/833

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Crystals. 10 (9): 1-13

APA: Tampieri A; Lilic M; Constantí M; Medina F (2020). Microwave-assisted aldol condensation of furfural and acetone over Mg–Al hydrotalcite-based catalysts. Crystals, 10(9), 1-13. DOI: 10.3390/cryst10090833

Article's DOI: 10.3390/cryst10090833

Entity: Universitat Rovira i Virgili

Journal publication year: 2020

Publication Type: Journal Publications