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Lookup NU author(s): Kamoru Salam,
Dr Sharon Velasquez Orta,
Professor Adam Harvey
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The kinetics of alkali-catalysed reactive extraction (“in situ transesterification”) of Chlorella vulgaris with methanol to produce biodiesel were investigated. Both the experiment and the model showed that a maximum 96% biodiesel yield can be obtained in 10 min before saponification FAME losses become significant. This high FAME yield was achieved despite high levels of free fatty acid (6% lipid) in C. vulgaris. The process shows higher level of water tolerance than a two-step transesterification. At 600:1 methanol to oil molar ratio, the process was not adversely affected by up to 20% moisture in the microalgae. A derived numerical model fitted with experimental data from this study showed that other side reactions including FAME and triglyceride saponification; free fatty acid neutralisation occur alongside the desired biodiesel synthesis in a NaOH-catalysed reactive extraction.
Author(s): Salam K, Velasquez-Orta SB, Harvey AP
Publication type: Article
Publication status: Published
Journal: Fuel Processing Technology
Print publication date: 04/04/2016
Online publication date: 15/01/2016
Acceptance date: 30/12/2015
ISSN (print): 0378-3820
ISSN (electronic): 1873-7188
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