Comparison of biodiesel production from crude Jatropha oil and Krating oil by supercritical methanol transesterification

Amonrat Samniang, Chuenkhuan Tipachan and Somjai Kajorncheappun-ngam

Renewable Energy, 2014, vol. 68, issue C, 351-355

Abstract: This work compared the production of biodiesel from two different non-edible oils with relatively high acid values (Jatropha oil and Krating oil). Using non-catalytic supercritical methanol transesterification, high methyl ester yield (85–90%) can be obtained in a very short time (5–10min). However, the dependence of fatty acid methyl ester yield on reaction conditions (i.e., temperature and pressure) and the optimum conditions were different by the source of oils and were correlated to the amount of free fatty acids (FFAs) and unsaturated fatty acid content in oils. Krating oil, which has higher FFAs and unsaturated fatty acid content, gave higher fatty acid methyl ester yield of 90.4% at 260°C, 16MPa, and 10min whereas biodiesel from Jatropha oil gave fatty acid methyl ester yield of 84.6% at 320°C, 15MPa and 5min using the same molar ratio of methanol to oil 40:1. The product quality from crude Krating oil met the biodiesel standard. Pre-processing steps such as degumming or oil purification are not necessary.

Keywords: Biodiesel; Supercritical fluid; Supercritical methanol; Jatropha oil; Krating oil (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:68:y:2014:i:c:p:351-355

DOI: 10.1016/j.renene.2014.01.039

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