Biocatalytic transesterification of triglycerides and alcohols for the production of biodiesel using cutinase in organic media

Abstract

The world's energy supply is mainly composed of fossil fuels, which are a non-renewable source of energy that is rapidly running out. To overcome this concern, industry has been focusing on the production of biofuels such as biodiesel. A range of approaches has been considered to transform oils into applicable biodiesel: dilutions, microemulsifications, pyrolysis and transesterification. The latter method consists of the conversion of triglycerides to a mixture of alkyl esters and glycerol, in the presence of an acyl acceptor and a catalyst. Due to high selectivity when using enzymes as catalysts, and mild operating conditions, biocatalytic transesterification has proven to be an efficient method. Cutinase, from the superfamily α/β hydrolases, is an enzyme with lipolytic activity that effectively catalyses transesterification reactions. This article highlights the use of cutinase microencapsulated in bis(2ethylhexyl) sodium sulfosuccinate (AOT)-reversed micelles to perform the biocatalytic transesterification of triglycerides, with low chain-length alcohols (e.g. methanol), in organic media to produce biodiesel.

Keywords::

• Biodiesel
• cutinase
• reversed micelles
• transesterification
• membrane reactor

Acknowledgments

S. M. Badenes acknowledges Fundação para a Ciência e Tecnologia (Portugal) for its financial support (SFRH/BPD/74449/2010).

Declaration of interest: The authors report no declarations of interest. The authors alone are responsible for the content and writing of the paper.