Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Heteropolyacids@Silica Heterogeneous Catalysts to Produce Solketal from Glycerol Acetalization

Catarina N. Dias
,
Isabel C.M.S. Santos-Vieira
ORCID logo ,
Carlos R. Gomes
,
Fátima Mirante
* ORCID logo ,
Salete S. Balula
* ORCID logo
Version 1 : Received: 25 March 2024 / Approved: 26 March 2024 / Online: 26 March 2024 (07:27:48 CET)

A peer-reviewed article of this Preprint also exists.

Dias, C.N.; Santos-Vieira, I.C.M.S.; Gomes, C.R.; Mirante, F.; Balula, S.S. Heteropolyacids@Silica Heterogeneous Catalysts to Produce Solketal from Glycerol Acetalization. Nanomaterials 2024, 14, 733. Dias, C.N.; Santos-Vieira, I.C.M.S.; Gomes, C.R.; Mirante, F.; Balula, S.S. Heteropolyacids@Silica Heterogeneous Catalysts to Produce Solketal from Glycerol Acetalization. Nanomaterials 2024, 14, 733.

Abstract

The composites of heteropolyacids (H3PW12, H3PMo12) incorporated into amine-functionalized silica materials, were used for the first time as heterogeneous catalysts in the valorisation of glycerol (a large waste from biodiesel industry) by acetalization reaction with acetone. The polyoxotungstate catalyst H3PW12@AptesSBA-15 presented higher catalytic efficiency than the phosphomolybdate, with 97% of conversion with 97% of solketal selectivity, after 60 min at 25 °C, or 91% of glycerol conversion and the same selectivity, after 5 min, performing the reaction at 60 ºC. A relation of catalytic performance and acidity of the catalyst is here presented. Furthermore, the stability of the solid catalyst was investigated and discussed.

Keywords

acetalization; solketal; heteropolyacids; mesoporous silica

Subject

Engineering, Chemical Engineering

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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