Kinetic Modelling of Decyl Acetate Synthesis by Supercritical Biocatalysis

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2009

Autores

M. V. Oliveira (Autor) FEUP; S. F. Rebocho (Autor) FEUP; A. S. Ribeiro (Autor) FEUP; E. A. Macedo (Autor) FEUP; J. M. Loureiro (Autor) FEUP

Ata de Conferência Internacional

Título: 8th World Congress of Chemical Engineering, Montreal

Páginas: 1-6

8th World Congress of Chemical Engineering

Montreal, Canadá, 23 a27 de Agosto de 2009

Indexação

ISI Proceedings

ISI Web of Science

Scopus

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

Outras Informações

Abstract (EN): The synthesis of decyl acetate, by the transesterification reaction of vinyl acetate with decanol, was studied using supercritical CO2 as solvent and immobilized Candida antarctica lipase B as catalyst (Novozym 435). The enzymatic content was determined for each particle size of the catalyst, showing that the smallest particles have a larger specific amount of enzyme and indicating that the enzyme is located in an external shell of the particle, following an ¿egg-shell¿ distribution, with an estimated thickness of ca. 60 µm, independent of the particle size. The reaction was enhanced by increasing the enzyme loading, the concentration of vinyl acetate and the temperature; it was inhibited by excess of decanol and by increasing the pressure. A simplified model, based on the Ping-pong bi-bi mechanism with competitive inhibition by the alcohol, was proposed for the transesterification of vinyl acetate with decanol at 35 ºC and 100 bar, and it was found to be suitable to represent the kinetic data.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6