Lipid Extraction and Transesterification in Microalgae for Biodiesel Production: A Comprehensive Review
نویسندگان
چکیده
Microalgae have been receiving worldwide attention as promising feedstock for production of carbon neutral biodiesel. As an alternative fuel, biodiesel is very imperative for the sustainable development of mankind. Biodiesel production process is generally carried out through upstream and downstream processing to generate cellular biomass, extracted oil and finally transesterification reaction. Transesterification reaction is facilitated with suitable catalyst either heterogeneous or homogeneous. Selection of catalyst is highly dependent on amount of free fatty acids in oil. Heterogeneous catalysts offers high sensitivity, high activity as well as higher water tolerance properties which depends on strength and amount of active basic and acidic sites. Basic and acidic catalyst can be subdivided on type of metal oxides, their derivatives and active acidic sites. This review aims to collate and present different lipid extraction process from microalgal cells, transesterification and suitability of microalgal lipid compositions for biodiesel conversion. Index Terms Lipid extraction; Organic solvent; Microalgae biomass; Biodiesel; FAME; In situ transesterification; Acid/base catalysts.
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