Heterogeneous acid catalyst based on sulfated iron ore tailings for oleic acid esterification

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dc.creatorCaroline Duarte Prates
dc.creatorFabiane Carvalho Ballotin
dc.creatorHenrique Limborço
dc.creatorJosé Domingos Ardisson
dc.creatorRochel Montero Lago
dc.creatorAna Paula de Carvalho Teixeira
dc.date.accessioned2023-07-26T14:50:41Z
dc.date.accessioned2025-09-08T22:54:24Z
dc.date.available2023-07-26T14:50:41Z
dc.date.issued2020
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.sponsorshipINCT – Instituto nacional de ciência e tecnologia (Antigo Instituto do Milênio)
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.1016/j.apcata.2020.117624
dc.identifier.issn0926-860X
dc.identifier.urihttps://hdl.handle.net/1843/56992
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofApplied Catalysis A: General
dc.rightsAcesso Restrito
dc.subjectBiodiesel
dc.subjectEsterificação (Química)
dc.subjectSulfato ferroso
dc.subjectCatalise heterogênea
dc.subject.otherBiodiesel
dc.subject.otherEsterification
dc.subject.otherSulfated iron oxide
dc.subject.otherAcid catalysis
dc.subject.otherMining waste
dc.titleHeterogeneous acid catalyst based on sulfated iron ore tailings for oleic acid esterification
dc.typeArtigo de periódico
local.citation.spage117624
local.citation.volume600
local.description.resumoIn this work, heterogeneous acid catalysts based on sulfated iron oxide produced from mining tailings were prepared by different processes, i.e. ammonium sulfate by simple grinding, (NH4)2SO4 aqueous impregnation and sulfuric acid impregnation, all treated at 500 °C. The materials were characterized by Mössbauer and Raman spectroscopies, FTIR, XRD, SEM, pyridine adsorption FTIR and potentiometric titration. The main mineral phases found were hematite and quartz and it was observed a great increase in the acidity of the materials produced due to the presence of sulfate groups. The synthesis with sulfuric acid was the most efficient process due to the formation of a greater amount of dispersed acid sites (density 0.1211 mmol g−1). The materials were used in esterification reactions. Ester production using 5 wt% of catalyst based on acid synthesis, 1:15 oleic acid:methanol molar ratio, 120 °C and 4 h led to conversions of 100%.
local.identifier.orcidhttps://orcid.org/0000-0003-2872-6690
local.identifier.orcidhttps://orcid.org/0000-0003-1181-3982
local.identifier.orcidhttps://orcid.org/0000-0002-5615-3482
local.identifier.orcidhttps://orcid.org/0000-0002-7145-6342
local.identifier.orcidhttps://orcid.org/0000-0002-4985-7502
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0926860X20302179

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