earticle

영어

In this study, direct transesterification of wet Nannochloropsis oceanica assisted by ionic liquids was investigated. Two critical factors that were found to maximize the FAME yield in direct transesterification process, included the amount of methanol and the choice of the ionic liquid. Among the ionic liquids that were tested in the study, the results showed that the usage of ionic liquid with [Bmim]+ resulted in superior extraction efficiency. The FAME yield increased from 28% to 54% upon the addition of 4 ml methanol to 300 mg of wet microalgae. Other reaction parameters, such as reaction temperature, types of acid and its concentration, water content, and reaction time were also investigated. In comparison to the conventional chloroform+methanol extraction process, the direct transesterification assisted by ionic liquid, clearly is a more efficient and cost effective method for biodiesel production. (This work was supported by the Advanced Biomass R&D Center (ABC) of Korea Grant funded by the Ministry of Education, Science and Technology (ABC-2010-0029728).