Journal
FUEL
Volume 120, Issue -, Pages 46-52Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2013.11.066
Keywords
Biodiesel; Jatropha curcas L.; Subcritical water; Yarrowia lipolytica
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Funding
- National Science Council of Taiwan [NSC 101-ET-0-E-011-003-ET]
- National Taiwan University of Science and Technology [101H451403]
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In this work, whole Japropha curcas L. seed kernels were firstly treated in subcritical water (448 K, 2.0 MPa initial N-2, 15 min, kernel to water ratio 0.5 g g(-1)) and then the treated kernels were used in the in situ production of biodiesel using a solvent mixture of 75% methanol and 25% acetic acid. It was found that hydrolysate collected from subcritical water treatment of seed kernels contained reducing sugars and can be used to grow Yarrowia lipolytica without the need of detoxification. The in-situ (trans)esterification was successfully optimized using Taguchi design of experiments and a high yield of 101.7 and 65.1 g FAME per 100 g of extractable lipid and dry kernel, respectively could be achieved under optimized conditions (523 K, 3.0 MPa initial CO2 and 7.5 cm(3) g (-1) solvent to solid ratio). The developed process can tolerate high FFA and moisture content in feedstock. (C) 2013 Elsevier Ltd. All rights reserved.
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