Selection of Lipases for the Synthesis of Biodiesel from Jatropha Oil and the Potential of Microwave Irradiation to Enhance the Reaction Rate

The present study deals with the enzymatic synthesis of biodiesel by transesterification of Jatropha oil (Jatropha curcas L.) with ethanol in a solvent-free system. Seven commercial lipase preparations immobilized by covalent attachment on epoxy-polysiloxane-polyvinyl alcohol composite (epoxy-SiO2-P...

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Bibliographic Details
Published in:BioMed research international 2016-01, Vol.2016 (2016), p.1-13
Main Authors: Souza, Lívia Tereza Andrade, de Castro, Heizir F., Mendes, Adriano A.
Format: Article
Language:English
Subjects:
Alcohol
Biocatalysis
Biocatalysts
Biodiesel fuels
Biofuels
Burkholderia cepacia
Burkholderia cepacia - metabolism
Cassava
Chemical properties
Enzymes
Epoxy Compounds - chemistry
Ethanol
Ether - chemistry
Fatty acids
Half-Life
Heating
Jatropha - chemistry
Jatropha curcas
Lipase
Lipase - metabolism
Microwave heating
Microwaves
Oils & fats
Plant Oils - chemistry
Polyvinyl Alcohol - chemistry
Potassium
Production processes
Pseudomonas fluorescens
Pseudomonas fluorescens - metabolism
Raw materials
Siloxanes - chemistry
Studies
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Summary:The present study deals with the enzymatic synthesis of biodiesel by transesterification of Jatropha oil (Jatropha curcas L.) with ethanol in a solvent-free system. Seven commercial lipase preparations immobilized by covalent attachment on epoxy-polysiloxane-polyvinyl alcohol composite (epoxy-SiO2-PVA) were tested as biocatalysts. Among them, immobilized lipases from Pseudomonas fluorescens (lipase AK) and Burkholderia cepacia (lipase PS) were the most active biocatalysts in biodiesel synthesis, reaching ethyl ester yields (FAEE) of 91.1 and 98.3% at 72 h of reaction, respectively. The latter biocatalyst exhibited similar performance compared to Novozym® 435. Purified biodiesel was characterized by different techniques. Transesterification reaction carried out under microwave irradiation exhibited higher yield and productivity than conventional heating. The operational stability of immobilized lipase PS was determined in repeated batch runs under conventional and microwave heating systems, revealing half-life times of 430.4 h and 23.5 h, respectively.
ISSN:2314-6133
2314-6141
DOI:10.1155/2016/1404567