Biodiesel production from Spirulina microalgae feedstock using direct transesterification near supercritical methanol condition

摘要: Microalgae as a candidate for production of biodiesel, possesses hard cell wall that prevents intracellular lipids leaving out from the cells. Direct or in situ supercritical transesterification has potential destruction microalgae and conversion extracted to biodiesel consequently reduces total energy consumption. Response surface methodology combined with central composite design was applied investigate process parameters including: Temperature, Time, Methanol-to-dry algae, Hexane-to-dry Moisture content. Thirty-two experiments were designed performed batch reactor, efficiency between 0.44% 99.32% obtained. According fatty acid methyl ester yields, quadratic experimental model adjusted significance evaluated using analysis variance (ANOVA). Effects single interaction also interpreted. In addition, effect on ultrastructure scanning electron spectrometry (SEM) surveyed.