Síntese de biodiesel via catálise enzimática em meio orgânico e em líquidos iônicos

Abstract

This work aims the biodiesel production in laboratory scale, by the soybean oil transesterification using a catalyst system enzyme / ionic liquid. The reaction was conducted with ethyl alcohol and was kept under magnetic stirring at ambient temperature for seven days. Combining the Pseudomonas cepacia PSC-I and Pseudomonas fluorescens lipases with the ionic liquids MEP. CH SO , DMEI. NTf , MEP. NTf , NBNMEP. NTf e MEMI. NTf , it was produced ten samples of biodiesel. These samples were qualitatively analyzed by Thin Layer Chromatography method and compared with the biodiesel synthesis using the catalytic system enzyme / organic solvent (butyl alcohol). It was obtained the formation of alkyl esters in all samples, but in the samples catalyzed by the systems Pseudomonas fluorescens / MEP. CH SO and Pseudomonas fluorescens / MEMI. NTf . It was observed the good performance of the ionic liquids compounds by the anion NTf , which were able to separate the glycerol from the non-polar phase to the polar phase (ionic liquid), preventing the reversion of transesterification reaction, and improving the lipases catalytic activity, that results in a shorter reaction time required for the triglycerides complete conversion in alkyl esters.