Mesoporous Methyl-Functionalized Sn-Silicates Generated by the Aerosol Process for the Sustainable Production of Ethyl Lactate

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Résumé

The aerosol-assisted sol-gel process was used to synthesize in a straightforward one-pot procedure a series of methyl-functionalized tin silicates with different degrees of methylation. The successful incorporation of isolated Sn as single site within the silica framework was confirmed via 119Sn solid-state NMR measurements, while 29Si and 13C solid-state magic-angle-spinning NMR experiments revealed a degree of methylation close to the theoretical value, hence proving the efficacy of the adopted cosynthetic approach. These materials were tested as catalysts in the synthesis of ethyl lactate from dihydroxyacetone and ethanol. The methylated solids display enhanced performances in terms of both activity and selectivity compared to the nonmethylated analogues, highlighting a strong beneficial role of surface hydrophobicity. Under proper conditions a total conversion and a selectivity higher than 95% were achieved. Moreover, the efficient separation and reuse of the heterogeneous catalyst as well as the possibility of an easily recover of the reaction solvent result in a very low waste production protocol with an exceptionally low E-factor.

langue originaleAnglais
Pages (de - à)14095-14103
Nombre de pages9
journalACS Sustainable Chemistry and Engineering
Volume6
Numéro de publication11
Les DOIs
Etat de la publicationPublié - 5 nov. 2018

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    Porous structured materials embedding tin and gallium as single-site for catalytic applications: effect of the hydrophobic/hydrophilic balance

    Author: VIVIAN, A., 14 mai 2020

    Superviseur: APRILE, C. (Promoteur), Debecker, D. P. (Personne externe) (Copromoteur), SPORKEN, R. (Président), Fiorilli, S. (Personne externe) (Jury), Gaigneaux, E. (Personne externe) (Jury) & Devillers, M. (Personne externe) (Jury)

    Thèse de l'étudiant: Doc typesDocteur en Sciences

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