A systematic multivariate analysis of the supercritical synthesis of soy biodiesel using 92.8% w/w hydrated ethanol

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dc.creatorPedro Wallace de Paula Amaral do Valle
dc.creatorIsabel Cristina Pereira Fortes
dc.creatorVânya Márcia Duarte Pasa
dc.date.accessioned2023-05-31T16:01:45Z
dc.date.accessioned2025-09-09T00:43:41Z
dc.date.available2023-05-31T16:01:45Z
dc.date.issued2016-08
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.1016/j.biombioe.2016.03.036
dc.identifier.issn1873-2909
dc.identifier.urihttps://hdl.handle.net/1843/54238
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofBiomass and Bioenergy
dc.rightsAcesso Restrito
dc.subjectBiodiesel
dc.subjectBioetanol
dc.subjectBiocombustíveis
dc.subjectOleo de soja
dc.subjectSíntese
dc.subjectOleos vegetais como combustível
dc.subjectAlcool
dc.subjectAplicações industriais
dc.subject.otherDoehlert design
dc.subject.otherHydrated ethanol
dc.subject.otherPhase evolution
dc.subject.otherSoy biodiesel
dc.subject.otherSupercritical synthesis
dc.titleA systematic multivariate analysis of the supercritical synthesis of soy biodiesel using 92.8% w/w hydrated ethanol
dc.typeArtigo de periódico
local.citation.epage25
local.citation.spage17
local.citation.volume91
local.description.resumoThe transesterification of vegetable oils under supercritical conditions has been identified as a viable alternative for efficient biodiesel synthesis and has the potential for industrial applications. In the present study, a multivariate analysis was used to optimize the supercritical transesterification of soybean oil and hydrated ethanol (92.8% w/w). The following variables were evaluated: reaction time, temperature, ethanol/oil molar ratio and the ratio between the reagent volume and reactor volume. The reactions were conducted according to a Doehlert design using four variables in a reactor specifically designed for this purpose. Glass windows positioned at the ends of the reactor allowed for the monitoring of the phases in the system at both the critical point and the supercritical environment. Both a mathematical linear regression model and response surface were created and used to determine the optimal synthesis conditions. An ester content of greater than 97.3% which was estimated using the optimized experimental conditions (320 °C, 50 min, ethanol/oil 49:1, reagent to reactor volume ratio of 60% and pressure lower than 20 MPa) indicated that biodiesel synthesis can be performed with high yields using hydrated bioethanol under supercritical conditions. The effects of temperature on polyunsaturated esters containing two and three carbon double bonds were also evaluated. The advantages of a supercritical synthetic route are that it requires neither catalysts nor washing water during the purification stages, produces purer glycerin than conventional processes and permits the re-use of ethanol without preliminary dehydration, which simplifies the overall process and has a low environmental impact.
local.identifier.orcidhttps://orcid.org/0000-0002-7440-2403
local.identifier.orcidhttps://orcid.org/0000-0002-2510-3845
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0961953416300988

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