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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/56992
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dc.creatorCaroline Duarte Pratespt_BR
dc.creatorFabiane Carvalho Ballotinpt_BR
dc.creatorHenrique Limborçopt_BR
dc.creatorJosé Domingos Ardissonpt_BR
dc.creatorRochel Montero Lagopt_BR
dc.creatorAna Paula de Carvalho Teixeirapt_BR
dc.date.accessioned2023-07-26T14:50:41Z-
dc.date.available2023-07-26T14:50:41Z-
dc.date.issued2020-
dc.citation.volume600pt_BR
dc.citation.spage117624pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.apcata.2020.117624pt_BR
dc.identifier.issn0926-860Xpt_BR
dc.identifier.urihttp://hdl.handle.net/1843/56992-
dc.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%.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Geraispt_BR
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.description.sponsorshipINCT – Instituto nacional de ciência e tecnologia (Antigo Instituto do Milênio)pt_BR
dc.description.sponsorshipOutra Agênciapt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE QUÍMICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofApplied Catalysis A: Generalpt_BR
dc.rightsAcesso Restritopt_BR
dc.subjectBiodieselpt_BR
dc.subjectEsterificationpt_BR
dc.subjectSulfated iron oxidept_BR
dc.subjectAcid catalysispt_BR
dc.subjectMining wastept_BR
dc.subject.otherBiodieselpt_BR
dc.subject.otherEsterificação (Química)pt_BR
dc.subject.otherSulfato ferrosopt_BR
dc.subject.otherCatalise heterogêneapt_BR
dc.titleHeterogeneous acid catalyst based on sulfated iron ore tailings for oleic acid esterificationpt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.sciencedirect.com/science/article/pii/S0926860X20302179pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-2872-6690pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-1181-3982pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-5615-3482pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-7145-6342pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4985-7502pt_BR
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