| 초록 |
As the prices of conventional fossil fuels continue to escalate, so-called alternative fuels will become more attractive. Marine microalgae can synthesize lipids that can be converted into biodiesel. For a successful biodiesel production process, various unit operation steps, such as such as drying, lipid extraction, transesterification and biodiesel refining, are required. Direct-transesterification combine lipid extraction and transesterification into a single step to simplify the biodisel production process. Process conditions for biodiesel production using two green microalgae, Dunaliella tertiolecta and Tetraselmis sp. KCTC12236BP, were investigated to optimize direct-transesterification process. The reaction conditions analyzed were reaction time, sulfuric acid concentration (catalyst), and volume of methanol. Maximum fatty acid methyl esters (FAMEs) contents were obtained at 64℃ and 3% sulfuric acid concentration. Optimal methanol volume and reaction time of direct-transesterification were 10 vol. (v/w) methanol and 3 h, respectively, for D. tertiolecta, and 7.5 vol. (v/w) and 5 h, respectively, for Tetraselmis sp. These results will help design a large-scale process for production from microalgae. |
