Microwave-assisted epoxidized oil production from the wet microalga Nannochloropsis gaditana to obtain environmentally friendly epoxy resins

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datacite.alternateIdentifier.citationCHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION,Vol.183,,2023
datacite.alternateIdentifier.doi10.1016/j.cep.2022.109215
datacite.creatorHidalgo, Pamela
datacite.creatorEcheverria, Ana
datacite.creatorRomero, Luis
datacite.creatorNavia, Rodrigo
datacite.creatorHunter, Renato
datacite.date2023
datacite.subject.englishMicroalgal oils
datacite.subject.englishEpoxidized oils
datacite.subject.englishMicrowave-assisted heating
datacite.subject.englishEpoxidation kinetics
datacite.titleMicrowave-assisted epoxidized oil production from the wet microalga Nannochloropsis gaditana to obtain environmentally friendly epoxy resins
dc.date.accessioned2023-06-08T15:48:06Z
dc.date.available2023-06-08T15:48:06Z
dc.description.abstractEpoxidized oils are widely used in the polymer industry to obtain biodegradable, environmentally friendly epoxy resins. This work examines solvent extraction and oil epoxidation from a wet paste of the microalga Nanno-chloropsis gaditana using microwave technology. An appropriate extraction solvent containing a mixture of a polar and a nonpolar solvent was selected. The results reveal that a chloroform/methanol ratio of 1:1 (v/v) promotes the high selectivity of unsaturated fatty acids of the oils for epoxidation. A central composite design was used to optimize the yield of epoxidized oils. The conditions that maximized the oxirane oxygen yield to 82.43% were as follows: temperature of 95 degrees C, catalyst dosage 0.25% wt, and heptane/oil mass ratio 3:4, using a formic acid/hydrogen peroxide 0.3:1.1 molar ratio. The epoxidation kinetics of microalgal oils and a mathematical model were developed. Using the least-squares method to fit the experimental data, the epoxidation rate constant found was on the order of 10-4 L mol-1 s-1 and the activation energy of 15.62 kJ/mol. Finally, the process presented some advantages due to the elimination of the drying step and the decrease in both reaction time and solvent dosage used during extraction and epoxidation.
dc.identifier.urihttps://repositoriodigital.uct.cl/handle/10925/5199
dc.language.isoen
dc.publisherELSEVIER SCIENCE SA
dc.sourceCHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
oaire.resourceTypeArticle
uct.indizacionSCI
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