Fe4(SiW12O40)3-catalyzed glycerol acetylation: synthesis of bioadditives by using highly active Lewis acid catalyst

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dc.creatorMárcio José da Silva
dc.creatorNatalia Aparecida Liberto
dc.creatorLorena Cristina de Andrade Leles
dc.creatorUlisses Alves Pereira
dc.date.accessioned2022-09-23T13:09:57Z
dc.date.accessioned2025-09-09T01:24:41Z
dc.date.available2022-09-23T13:09:57Z
dc.date.issued2016-10
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.1016/j.molcata.2016.03.003
dc.identifier.issn1873-314X
dc.identifier.urihttps://hdl.handle.net/1843/45415
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Molecular Catalysis A: Chemical
dc.rightsAcesso Restrito
dc.subjectGlicerina
dc.subjectCatalisadores
dc.subjectÉsteres
dc.subjectÁcido acético
dc.titleFe4(SiW12O40)3-catalyzed glycerol acetylation: synthesis of bioadditives by using highly active Lewis acid catalyst
dc.typeArtigo de periódico
local.citation.epage83
local.citation.spage69
local.citation.volume422
local.description.resumoIn order to investigate the effect of Lewis acidic metals on the acid properties of Keggin heteropolyacids catalysts, a set of metal-exchanged HPAs (i.e. M3/nPW12O40, M3/nPMo12O40 and M4/nSiW12O40 (M = Cu, Co and Mn, n = 2; M = Fe, n = 3) were synthesized and their activity on glycerol esterification with acetic acid was evaluated. This procedure avoids the use of corrosive Brønsted acid catalysts. Regardless of the heteropoly anion, the activity of catalysts in terms of metal cations followed the sequence: Fe3+> Cu2+> Mn2+> Co2+. It has been found that among the HPAs, only H4SiW12O40 has the acidic protons that can be successfully exchanged with Fe3+ cations, resulting in Fe4(SiW12O40)3 salt, the most active and selective catalyst. The highest conversion (ca.99.9%) was achieved in Fe4(SiW12O40)3-catalyzed esterification reactions, along with the highest selectivity for di and triacetyl glycerol (ca.55 and 42%, respectively). Effects of temperature, stoichiometry of reactants, concentration and nature of catalysts were assessed. A kinetic study of Fe4(SiW12O40)3 or H4SiW12O40-catalyzed reactions was conducted and the activation energy determined.
local.publisher.countryBrasil
local.publisher.departmentICA - INSTITUTO DE CIÊNCIAS AGRÁRIAS
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S138111691630070X

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