In Situ Transesterification of Marine Microalgae Biomass via Heterogeneous Acid Catalysis

Autor(es)

Zorn, Savienne M. F. E. ^[1] ; Reis, Cristiano E. R. ^[1] ; Bento, Heitor B. S. ^[1] ; de Carvalho, Ana Karine F. ^[1] ; Silva, Messias B. ^[1] ; De Castro, Heizir F. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Engn Sch Lorena, BR-12602810 Lorena, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BioEnergy Research; v. 13, n. 4 JUN 2020.
• Citações Web of Science: 0

Resumo

Microalgae have been widely considered as a promising alternative to renewable feedstock to biofuel production. Considering the many oleaginous strains of microalgae, this work assessed the potential of two species, Chlorella minutissima and Nannochloropsis gaditana, to be tested as raw material for ethyl esters production of biodiesel value. This work demonstrates an efficient pilot-size photoautotrophic growth of the two strains using 40-L bubble-column photobioreactors, providing lipid productivities of around 15.2 and 8.7 mg L-1 day(-1) for C. minutissima and N. gaditana, respectively. The lipid-bearing biomass, which presented fatty acids composition similar to vegetable oils, such as soybean, rich in palmitic, oleic, and linoleic acids, was then assayed in direct trans/esterification reactions using ethanol as acyl donor, lipid extracting and solvent for the liquid phase in a pressurized reactor. The reactions, which were catalyzed by a heterogeneous acid catalyst (12-molybdophosphoric acid supported onto aluminum oxide), demonstrated an efficient route for producing a product mixture containing ester contents greater than 96.5 wt%, total conversion of triacylglycerols, and low levels of mono- and diacylglycerols, promoting an ethyl ester mixture with possible integration within the biodiesel market specifications. (AU)

• Processo FAPESP: 17/12908-8 - Cultivo fúngico no vinhoto de cana-de-açúcar e desenvolvimento de uma plataforma de produtos de alto valor na indústria de etanol
• Beneficiário: Cristiano Eduardo Rodrigues Reis
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/01386-3 - Liquens artificiais e a integração de produtos de alto valor agregado a uma biorrefinaria
• Beneficiário: Savienne Maria Fiorentini Elerbrock Zorn
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/10636-8 - Da fábrica celular à biorrefinaria integrada Biodiesel-Bioetanol: uma abordagem sistêmica aplicada a problemas complexos em micro e macroescalas
• Beneficiário: Roberto de Campos Giordano
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático