RABANINGRUM, NUNUNG P
(2014)
OPTIMIZATION AND REACTION KINETICS OF IN-SITU TRANSESTERIFICATION OF JATROPHA CURCAS SEEDS.
PhD thesis, Universiti Teknologi PETRONAS.
Abstract
Minimizing the cost of raw materials and the cost of processing is the key to make
biodiesel technology competitive. Use of a non-edible oil such as Jatropha curcas oil
can be cheaper option; in-situ transesterification of oil seeds can reduce the processing
costs of oil recovery. In-situ alkaline transesterification of Jatropha curcas oil seeds
with methanol, isopropanol and the mixture of methanol with isopropanol were
explored in a stirred tank reactor. Optimum operating conditions were established
through response surface methodology for promising options. Inspite of higher
solubility of oil in isopropanol, in-situ alkaline transesterification of Jatropha curcas
oil seeds with methanol was observed to be better with a yield of (90.45 0.25)%.
Mixing methanol with isopropanol could enhance the yield of methyl-isopropyl ester
yield of (94.78 0.29)%. The properties of methyl-isopropyl ester were similar to the
properties of methyl ester which were in agreement with the standards of EN 14214
and ASTM D6751.
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