Study of eggshell as precursor of a heterogeneous catalyst in one step neutralization and transesterification reactions of acid macauba and soybean oil

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dc.creatorGustavo Pereira dos Reis
dc.creatorClaudia Cristina Cardoso da Silva
dc.creatorFabiana Pereira de Sousa
dc.creatorVânya Márcia Duarte Pasa
dc.date.accessioned2023-06-19T20:03:16Z
dc.date.accessioned2025-09-09T00:40:54Z
dc.date.available2023-06-19T20:03:16Z
dc.date.issued2019
dc.description.sponsorshipFINEP - Financiadora de Estudos e Projetos, Financiadora de Estudos e Projetos
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.12691/aees-7-5-2
dc.identifier.issn2328-3920
dc.identifier.urihttps://hdl.handle.net/1843/55122
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofApplied Ecology and Environmental Sciences
dc.rightsAcesso Aberto
dc.subjectBiodiesel
dc.subjectBiocombustíveis
dc.subjectCatálise heterogênea
dc.subjectÓleo de soja
dc.subjectÓleo de macaúba
dc.subjectÓxido de cálcio
dc.subjectReações químicas
dc.subject.otherEggshell
dc.subject.otherBiodiesel
dc.subject.otherHigh-acidity oil
dc.subject.otherHeterogeneous catalyst
dc.subject.otherMacauba oil
dc.titleStudy of eggshell as precursor of a heterogeneous catalyst in one step neutralization and transesterification reactions of acid macauba and soybean oil
dc.typeArtigo de periódico
local.citation.epage175
local.citation.issue5
local.citation.spage168
local.citation.volume7
local.description.resumoBiodiesel is an important biofuel used worldwide as a total or partial substitute for fossil diesel. Many studies have been developed to reduce their costs, specially using acid oils as waste oil and inexpensive heterogeneous catalysts. CaO obtained from calcinated waste eggshells has been the object of study of this work to produce biodiesel using neutral soybean oil (<1.0 mg KOH/g) and high-acidity soybean oil (9.5 mg KOH/g) and macauba oil (20.0 mg KOH/g). A preliminary study of transesterification of neutral soybean oil with methanol in a molar ratio of oil:alcohol 1:12 in 3% of CaO-egg reached conversion 95% of FAME after 4 h of reflux. The progress of the reaction was analyzed both quantitatively by 1H NMR, as qualitatively by HPLC. The resultant biodiesel has met the international specifications as the kinematic viscosity and density, with values 4.37 mm2/s and 885.8 kg/m3, respectively. The study of breakthrough of the reaction between the doped acid soybean oil in the presence of methanol in a molar ratio of oil:alcohol 1:18, using 3% (w/w) CaO-egg indicated that the oil triglyceride only begins to be transesterified after all the neutralization of FFA. After 6 h of reflux the FAME conversion was of 96%. Using the same reaction conditions, while using the acid macauba oil, the FAME content was of 94%. The results showed the efficiency of CaO-egg for simultaneous neutralization/transesterification reaction for high-acidity oil, in only one step reaction.
local.identifier.orcidhttps://orcid.org/0000-0001-5940-1042
local.identifier.orcidhttps://orcid.org/0000-0002-2510-3845
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttp://pubs.sciepub.com/aees/7/5/2/

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