Continuous catalyst-free production of esters from Jatropha curcas L. oil under supercritical ethanol
In the present study, the transesterification of Jatropha oil in a continuous catalyst-free process using supercritical ethanol was investigated. Experiments were performed in a packed-bed tubular reactor by studying the effect on the reaction of temperature, pressure, water and cosolvent (n-hexane)...
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Brazilian Society of Chemical Engineering
2014-09-01
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doaj-67ce15c8ba48416c94008be46c3cc8cc2020-11-24T23:23:14ZengBrazilian Society of Chemical EngineeringBrazilian Journal of Chemical Engineering0104-66322014-09-0131372773510.1590/0104-6632.20140313s00002709S0104-66322014000300015Continuous catalyst-free production of esters from Jatropha curcas L. oil under supercritical ethanolC. Silva0T. A. S. Colonelli1E. A. Silva2V. F. Cabral3J. V. Oliveira4L. Cardozo-Filho5Universidade Estadual de MaringáUniversidade Estadual do Oeste do ParanáUniversidade Estadual do Oeste do ParanáUniversidade Estadual de MaringáUniversidade Federal de Santa CatarinaUniversidade Estadual de MaringáIn the present study, the transesterification of Jatropha oil in a continuous catalyst-free process using supercritical ethanol was investigated. Experiments were performed in a packed-bed tubular reactor by studying the effect on the reaction of temperature, pressure, water and cosolvent (n-hexane) concentrations, keeping the oil:ethanol mass ratio fixed at 1:1 for different residence times. The results demonstrated that temperature and pressure had a positive effect on fatty acid ethyl ester (FAEE) production and it was observed that the free fatty acids present in vegetable oil promote faster reaction kinetics due to simultaneous esterification and transesterification reactions. The addition of water and a cosolvent increased the FAEE yields at 573 K and 20 MPa. Within the experimental ranges investigated, water and the cosolvent decreased the decomposition of fatty acids. Appreciable reaction yields (~90 wt%) were achieved at 573 K, 20 MPa, with an oil:ethanol mass ratio of 1:1 and 10 wt% water.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322014000300015&lng=en&tlng=enJatropha curcas oilEthyl estersContinuous processCatalyst-free process |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
C. Silva T. A. S. Colonelli E. A. Silva V. F. Cabral J. V. Oliveira L. Cardozo-Filho |
spellingShingle |
C. Silva T. A. S. Colonelli E. A. Silva V. F. Cabral J. V. Oliveira L. Cardozo-Filho Continuous catalyst-free production of esters from Jatropha curcas L. oil under supercritical ethanol Brazilian Journal of Chemical Engineering Jatropha curcas oil Ethyl esters Continuous process Catalyst-free process |
author_facet |
C. Silva T. A. S. Colonelli E. A. Silva V. F. Cabral J. V. Oliveira L. Cardozo-Filho |
author_sort |
C. Silva |
title |
Continuous catalyst-free production of esters from Jatropha curcas L. oil under supercritical ethanol |
title_short |
Continuous catalyst-free production of esters from Jatropha curcas L. oil under supercritical ethanol |
title_full |
Continuous catalyst-free production of esters from Jatropha curcas L. oil under supercritical ethanol |
title_fullStr |
Continuous catalyst-free production of esters from Jatropha curcas L. oil under supercritical ethanol |
title_full_unstemmed |
Continuous catalyst-free production of esters from Jatropha curcas L. oil under supercritical ethanol |
title_sort |
continuous catalyst-free production of esters from jatropha curcas l. oil under supercritical ethanol |
publisher |
Brazilian Society of Chemical Engineering |
series |
Brazilian Journal of Chemical Engineering |
issn |
0104-6632 |
publishDate |
2014-09-01 |
description |
In the present study, the transesterification of Jatropha oil in a continuous catalyst-free process using supercritical ethanol was investigated. Experiments were performed in a packed-bed tubular reactor by studying the effect on the reaction of temperature, pressure, water and cosolvent (n-hexane) concentrations, keeping the oil:ethanol mass ratio fixed at 1:1 for different residence times. The results demonstrated that temperature and pressure had a positive effect on fatty acid ethyl ester (FAEE) production and it was observed that the free fatty acids present in vegetable oil promote faster reaction kinetics due to simultaneous esterification and transesterification reactions. The addition of water and a cosolvent increased the FAEE yields at 573 K and 20 MPa. Within the experimental ranges investigated, water and the cosolvent decreased the decomposition of fatty acids. Appreciable reaction yields (~90 wt%) were achieved at 573 K, 20 MPa, with an oil:ethanol mass ratio of 1:1 and 10 wt% water. |
topic |
Jatropha curcas oil Ethyl esters Continuous process Catalyst-free process |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322014000300015&lng=en&tlng=en |
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