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Artigo Acesso aberto Produção Nacional Revisado por pares
BIBTEX RIS

Alternativa potencial para aproveitamento do glicerol gerado na produção de biodiesel: síntese enzimática de monolaurina por esterificação

2009; Brazilian Chemical Society; Volume: 32; Issue: 9 Linguagem: Inglês

10.1590/s0100-40422009000900007

ISSN

1678-7064

Autores

Larissa Freitas, Joana Carolina Freire Sandes Santos, Marcos V. Barcza, Heizir F. de Castro,

Tópico(s)

Biofuel production and bioconversion

Resumo

OF MONOLAURIN BY ESTERIFICATION.Esterification reactions of glycerol with lauric acid in solvent free system were carried out using lipases from several sources.All lipases were immobilized on polysiloxane-polyvinyl alcohol particles by covalent binding with high activity recovered.Among the tested enzymes, the Candida antarctica lipase allowed to attain the highest molar conversion (76%), giving similar proportions of monolaurin, dilaurin and low amount of trilaurin.To further improve the process, the Response Surface Methodology (RSM) was used and optima temperature and molar ratio glycerol to lauric acid were found to be 45 °C and 5:1, respectively.Under these conditions, 31.35% of monolaurin concentrations were attained and this result was in close agreement with the statistical model prediction.

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