Please use this identifier to cite or link to this item: http://hdl.handle.net/10321/2404
Title: Synthesis of biodiesel from Scenedesmus sp. by microwave and ultrasound assisted in situ transesterification using tungstated zirconia as a solid acid catalyst
Authors: Guldhe, Abhishek 
Singh, Bhaskar 
Rawat, Ismail 
Bux, Faizal 
Keywords: Biodiesel;In situ transesterification;Microwave;Ultrasound;Heterogeneous;Microalgae
Issue Date: 20-May-2014
Publisher: Elsevier
Source: Guldhe, A., Singh, B., Rawat, I. and Bux, F. 2014. Synthesis of biodiesel from Scenedesmus sp. by microwave and ultrasound assisted in situ transesterification using tungstated zirconia as a solid acid catalyst. Chemical Engineering Research and Design. 92(8): 1503–1511.
Abstract: Oleaginous Scenedesmus sp. was cultivated phototrophically in an open pond for biofuels production. The culture was harvested and subsequently dewatered and dried. The chemical properties of the Scenedesmus sp. lipids were determined as per standard ASTM methods. Biodiesel was synthesized by in situ transesterification from dried biomass using microwave and sonication techniques with tungstated zirconia (WO3/ZrO2) as a solid acid catalyst. In situ transesterification allowed minimizing the requirement of solvents by merging the two steps (i.e. extraction of lipid and conversion to biodiesel) to a single step. The use of a solid catalyst effectively reduces the purification cost of biodiesel due to ease of separation and potential for reuse. The conversion of Scenedesmus sp. lipids to biodiesel was determined by GC. Box–Behnken design was used for optimization of the variables to optimize the biodiesel yield and conversion. The efficiency of the two processes was compared.
URI: http://hdl.handle.net/10321/2404
ISSN: 0263-8762
Appears in Collections:Research Publications (Water and Wastewater Technology)

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