Frontiers of Chemical Science and Engineering >

2012 , Vol. 6 >Issue 2: 210 - 215

DOI: https://doi.org/10.1007/s11705-012-1282-5

RESEARCH ARTICLE

Optimization of pretreatment of Jatropha oil with high free fatty acids for biodiesel production

  • Supriyono SUWITO 1,2 ,
  • Giuliano DRAGONE , 1 ,
  • Hary SULISTYO 2 ,
  • Bardi MURACHMAN 2 ,
  • Suryo PURWONO 2 ,
  • José TEIXEIRA 1
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  • 1. Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Braga 4710-057, Portugal
  • 2. Chemical Engineering Department, Gadjah Mada University, Yogyakarta 55281, Indonesia

Received date: 20 Nov 2011

Accepted date: 02 Mar 2012

Published date: 05 Jun 2012

Copyright

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg
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Abstract

A central composite rotatable design and response surface methodology were used in order to investigate the individual and combined effects of the ethanol-to-oil ratio, H2SO4 concentration, temperature and time of reaction on the reduction of free fatty acid (FFA) in jatropha oil. A quadratic polynomial model relating the reaction variables with FFA reduction was developed, presenting a good coefficient of determination (R2= 0.893). For reducing FFA to less than 1%, the optimal combination was found to be 0.62 v·v-1 ethanol-to-oil ratio (14.9 v·v-1 ethanol-to-FFA ratio), 1.7% v·v-1 H2SO4 concentration, and 79 min reaction time at a reaction temperature of 54°C. These results are of great relevance to maximize methyl esters formation by transesterification using an alkaline catalyst.

Key words： biodiesel; biofuel; esterification; free fatty acids; jatropha curcas oil

Cite this article

Supriyono SUWITO , Giuliano DRAGONE , Hary SULISTYO , Bardi MURACHMAN , Suryo PURWONO , José TEIXEIRA . Optimization of pretreatment of Jatropha oil with high free fatty acids for biodiesel production[J]. Frontiers of Chemical Science and Engineering, 2012 , 6(2) : 210 -215 . DOI: 10.1007/s11705-012-1282-5

Acknowledgements

This work was supported by Fundação para a Ciência Technology through G. Dragone grant SFRH/BPD/44935/2008. The authors acknowledge financial support from project INNOVALGAE (PTDC/AAC-AMB/108511/2008).

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