Biodiesel production from microalgae by direct transesterification using green solvents

Autor(es)

de Jesus, Sergio S. ^[1] ; Ferreira, Gabriela F. ^[1] ; Moreira, Larissa S. ^[2] ; Maciel Filho, Rubens ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Chem Engn, Lab Optimizat Design & Adv Control, PO 6066, BR-13083852 Campinas, SP - Brazil

^[2] Univ Fed Rio de Janeiro, Sch Pharm, BR-21941170 Rio De Janeiro, RJ - Brazil

• Tipo de documento: Artigo Científico
• Fonte: RENEWABLE ENERGY; v. 160, p. 1283-1294, NOV 2020.
• Citações Web of Science: 13

Resumo

This study evaluated the production of biodiesel from the microalgae Chlorella pyrenoidosa by direct transesterification using 2-methyltetrahydrofuran or cyclopentyl methyl ether co-solvents as an alternative to chloroform. Acid-catalyzed transesterification using hydrochloric acid was developed for biodiesel production. Biodiesel was purified by column chromatography using one of the two green solvents as eluents. The highly ecological biodiesel quality was compared to the biodiesel produced using chloroform as co-solvent. A 33 factorial design was conducted to optimize the production of fatty acid methyl esters, being the independent variables investigated: solvent and catalyst volume, solvent and catalyst ratio (methanol:co-solvent:hydrochloric acid), and temperature, with a reaction time of 150 min. Biodiesel production was mainly influenced by temperature increase. The achieved yields using cyclopentyl methyl ether, 2-methyltetrahydrofuran, and chloroform were 71-92%, 67-91%, and 61-76%, respectively. The fatty acid methyl esters profile of biodiesel produced with 2-methyltetrahydrofuran and cyclopentyl methyl ether consisted of approximately 45% polyunsaturated components. The biodiesel obtained was within the ASTM D6751 and EN 14214 standards. The replacement of fossil solvents used in direct transesterification of biomass with a green solvent resulted in a further ecological biodiesel production process towards a circular bioeconomy. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 15/19609-0 - Utilização de solventes verdes derivados da cana-de-açúcar na extração de lipídeos e aplicação na produção de biodiesel e síntese do 2-metiltetrahidrofurano através do bagaço
• Beneficiário: Rubens Maciel Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/03764-3 - Projeto e construção de um fotobiorreator airlift agitado para a produção de lipídeos e carboidratos
• Beneficiário: Sergio Santos de Jesus
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado