Biodiesel production from supercritical carbon dioxide extracted Jatropha oil using subcritical hydrolysis and supercritical methylation

Chen, Ching-Hung; Chen, Weiheng; Chang, Chieh-Ming J.; Lai, Shih‐Ming; Tu, Chien-Hsiun

doi:10.1016/j.supflu.2009.12.010

Cited by 56 publications

(37 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Solvent extractions are typically employed as a second step to recover lipids from extruded pressed cakes, but still resulted in a lipid loss of $10% [27,28]. With a better recovery than mechanical expellers and much shorter time than solvent extraction, supercritical carbon dioxide extraction required very high operating pressure (up to 35.0 MPa) and a long extraction time (5 h) [30]. A three phase partitioning method was used by Vyas et al [31] which required an overall extraction and separation time of 2 h, but involved several intermediate steps and could only achieve a recovery of 85%.…”

Section: Comparison With Other In Situ Technologiesmentioning

confidence: 99%

In situ transesterification of Jatropha curcas L. seeds in subcritical solvent system

Sutanto

Liu

et al. 2014

Journal of the Taiwan Institute of Chemical Engineers

View full text Add to dashboard Cite

Section: Comparison With Other In Situ Technologiesmentioning

confidence: 99%

In situ transesterification of Jatropha curcas L. seeds in subcritical solvent system

Sutanto

Liu

et al. 2014

Journal of the Taiwan Institute of Chemical Engineers

View full text Add to dashboard Cite

“…This feedstock has a high concentration of free fatty acids (>10 wt%), which have a negative effect on the conventional homogeneous alkali-catalyzed process and heterogeneous catalytic methods, but can be successfully used in the transesterification reaction using an alcohol under supercritical conditions. Some studies available in the literature have reported on biodiesel production from Jatropha oil by non-catalytic methods under supercritical conditions, including: i) a one-step process in batch mode with supercritical methyl acetate (Niza et al, 2011), supercritical methanol (Rathore and Madras, 2007;Hawash et al, 2009;Niza et al, 2011) or supercritical ethanol (Rathore and Madras, 2007); ii) a twostep process in batch mode involving hydrolysis of triglycerides followed by methylation of fatty acids (Chen et al, 2010) or hydrolysis of triglycerides followed by the use of dimethyl carbonate in the esterification reaction (Ilham and Saka, 2010). However, the use of supercritical ethanol to produce esters from Jatropha oil in a one-step process in continuous mode has been little explored in the literature.…”

Section: Introductionmentioning

confidence: 99%

Continuous catalyst-free production of esters from Jatropha curcas L. oil under supercritical ethanol

Silva

Colonelli

Silva

et al. 2014

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-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.

show abstract

“…It was only found a similar work that used supercritical carbon dioxide Some studies have investigated the use of supercritical fluid in the oil extraction or biodiesel production from Jatropha curcas (Machmudah et al, 2008;Willems et al, 2008;Chen et al, 2010;Chen et al, 2011;Chen et al, 2012). However they didnt report the presence or absence of phorbol ester.…”

Section: Resultsmentioning

confidence: 99%

Technical and Economic Evaluation of Phorbol Esters Extraction from Jatropha Curcas Seed Cake using Supercritical Carbon Dioxide

Pereira¹,

Pessoa²,

Mendonça³

et al. 2016

AJBB

View full text Add to dashboard Cite

Jatropha curcas plant shrub of Euphorbiaceae family is a plant whose seeds are rich in oil that can be used for biofuel production. However the seeds contain many toxic compounds which the most important ones are known as phorbol esters (PEs). This study has as aim the study of the technical and economic feasibility of the supercritical fluid to extract the PEs present in the Jatropha seed cake. The effect of temperature (40 -100 ºC) and pressure (100 -500 bar) on the phorbol yield was investigated using a central composite design methodology to determine the significance and interactions of these parameters. PEs in the extracted samples were analyzed and quantified by HPLC. The supercritical fluid extraction was effective in the PE extraction from Jatropha curcas cake varying from 23.0%, at 70 ºC and 500 bar to 2.6% at 90 ºC and 160 bar. The results showed that pressure had the most significant enhancing effect on the phorbol ester yield. Simulations of phorbol ester extraction from Jatropha curcas cake were carried out using SuperPro Designer 9.0 to evaluate the production costs of an industrial process to treat the necessary quantity of cake. It was possible to conclude that the supercritical extraction is a promising technology that can be applied to detoxify the Jatropha curcas cake.

show abstract

Biodiesel production from supercritical carbon dioxide extracted Jatropha oil using subcritical hydrolysis and supercritical methylation

Cited by 56 publications

References 21 publications

In situ transesterification of Jatropha curcas L. seeds in subcritical solvent system

In situ transesterification of Jatropha curcas L. seeds in subcritical solvent system

Continuous catalyst-free production of esters from Jatropha curcas L. oil under supercritical ethanol

Technical and Economic Evaluation of Phorbol Esters Extraction from Jatropha Curcas Seed Cake using Supercritical Carbon Dioxide

Contact Info

Product

Resources

About