Artigo de Periódico
Thermodynamic analysis of the kinetics reactions of the production of FAME and FAEE using Novozyme 435 as catalyst
Fecha
2011Registro en:
0378-3820
v. 92, n. 5.
Autor
Ferrão-Gonzales, Astria Dias
Véras, Ilvania Costa
Silva, Frederico Augusto Lima
Alvarez, Heiddy Márquez
Moreau, Vitor Hugo
Ferrão-Gonzales, Astria Dias
Véras, Ilvania Costa
Silva, Frederico Augusto Lima
Alvarez, Heiddy Márquez
Moreau, Vitor Hugo
Institución
Resumen
Biodiesel is a biofuel expected to become a substitute for petroleum diesel. One of the most promising
technologies for production of biodiesel is enzymatic catalysis. However, low catalytic performance of most of
the enzymes employed makes such processes expensive and time-consuming. This work describes a kinetic
study of the enzymatic production of biodiesel at different temperatures using either methanolysis or
ethanolysis, using immobilized lipase from Candida antarctica (Novozym 435) as catalyst. Reactions kinetics
were followed by GC, and data were used to perform thermodynamic analysis of the transition state using
Arrhenius equation. We found that methanolysis is faster than ethanolysis at temperatures above 13 °C.
Thermodynamic analysis of the kinetics of reactions showed that methanol is favored as acyl acceptor due to
the positive activation entropy change of reaction. These data may be useful in the development of new
enzymes and new processes for enzymatic production of biodiesel.