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Figure 10.3 FAME yield for acid-catalysed reactive extraction of
L. seeds
versus reaction period at different ranges of particle size. Reprinted from Shuit et al
#
2010,
with permission from Elsevier.
Jatropha curcas
10.2.1.3 Conclusion
In this study, acid-catalysed reactive extraction has been proven to be a promising
technology for the production of biodiesel from feedstock that contains high free fatty
acid (FFA), such as Jatropha curcas L. seeds. It has the potential to reduce the cost of
production compared to conventional biodiesel production technology.
10.2.2 Supercritical Reactive Extraction for FAME Synthesis
from
Jatropha curcas
L. Seeds
Noncatalytic supercritical methanol for biodiesel production had also been proven to be
superior in terms of reaction time, product separation, FAME yield and process
complicity compared to conventional biodiesel processing [18]. Fluid in a supercritical
phase can be considered an intermediate between liquid and gas. This special state has
been attributed to several distinctive characteristics, such as low viscosity, high diffusion
coefficients, variation of density and dielectric constant as a function of pressure.
Consequently, supercritical fluids (SCFs) are an excellent extraction solvent as well as
chemical reaction reagent. As an extension to the acid-catalysed reactive extraction, the
main objective of this research was to determine the feasibility of noncatalytic super-
critical reactive extraction using methanol to produce biodiesel from Jatropha curcas L.
seeds in a high-pressure batch reactor with n-hexane as cosolvent. The effects of the
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