Journal
BIORESOURCE TECHNOLOGY
Volume 100, Issue 11, Pages 2828-2831Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2008.12.027
Keywords
Biodiesel; Nannochloropsis oculata; Microalgae; Heterogeneous catalyst; Sol-gel
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In this study, we present the activities of Al2O3 supported CaO and MgO catalysts in the transesterification of lipid of yellow green microalgae, Nannochloropsis oculata, as a function of methanol amount and the CaO and MgO loadings at 50 degrees C. We found that pure CaO and MgO were not active and CaO/Al2O3 catalyst among all the mixed oxide catalysts showed the highest activity. Not only the basic site density but also the basic strength is important to achieve the high biodiesel yield. Biodiesel yield over 80 wt.% CaO/Al2O3 catalyst increased to 97.5% from 23% when methanol/lipid molar ratio was 30. (c) 2008 Elsevier Ltd. All rights reserved.
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