Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Synthesis of 2-ethylhexyl oleate catalyzed by Candida antarctica lipase immobilized on a magnetic polymer support in continuous flow

Texto completo
Autor(es):
da Silva, Mateus V. C. [1] ; Souza, Amanda B. [1] ; de Castro, Heizir F. [1] ; Aguiar, Leandro G. [1] ; de Oliveira, Pedro C. [1] ; de Freitas, Larissa [1]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Engn Sch Lorena, Dept Chem Engn, BR-12602810 Lorena, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Bioprocess and Biosystems Engineering; v. 43, n. 4, p. 615-623, APR 2020.
Citações Web of Science: 0
Resumo

This study investigated the synthesis of 2-ethylhexyl oleate catalyzed by Candida antarctica lipase immobilized on magnetic poly(styrene-co-divinylbenzene) particles in a continuous packed-bed bioreactor. Runs were carried out in a solvent-free system at 50 degrees C. The performance of the reactor was evaluated for substrates composed by oleic acid and 2-ethylhexanol at five molar ratios (1:4-4:1), determining its operation limits in terms of substrate flow rate. The system performance was quantified for three different flow rates corresponding to space-time between 3 and 12 h. For each condition, the influence of the space-time in the ester formation, esterification yield and productivity was determined. The molar ratio of acid-to-alcohol interfered, in a remarkable way, in the formation of 2-ethylhexyl oleate and the best performance was attained for substrate at equimolar ratio running at 12 h space-time. Under this condition, average 2-ethylhexyl oleate concentration was 471.65 +/- 2.98 g L-1 which corresponded to ester productivity of 23.16 +/- 0.49 mmol g(-1) L-1 h(-1). This strategy also gave high biocatalyst operational stability, revealing a half-life time of 2063 h. A model based on the ping-pong Bi-Bi mechanism was developed to describe the kinetics of the esterification reaction and validated using experimental data. The goodness of fit of the model was satisfactory (R-2 = 0.9310-0.9952). (AU)

Processo FAPESP: 17/04934-9 - Síntese e caracterização de partículas poliméricas à base de estireno com propriedades magnéticas para utilização como matriz de imobilização de enzimas
Beneficiário:Cintia Maria Rodrigues Rosa
Linha de fomento: Bolsas no Brasil - Mestrado
Processo FAPESP: 16/17833-3 - Síntese de ésteres emolientes catalisada por lipase imobilizada em copolímeros à base de estireno com propriedades magnéticas
Beneficiário:Larissa de Freitas
Linha de fomento: Auxílio à Pesquisa - Regular
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
Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Temático