| 초록 |
Microalgal bioenergy could replace fossil energy and reduces greenhouse gas emissions. Hydrothermal liquefaction (HTL) of microalgae would be an attractive conversion method by skipping the energy intensive drying steps from aquatic biomass. Conditions for HTL of marine microalgae Tetraselmis sp. were investigated over a subcritical temperatures of water (300-350℃) and reaction times (up to 120 min), using a batch type reactor. The four different product fractions (gas, biocrude, aqueous phase, and solid) were quantified and analyzed. Fatty acids were the most abundant components in the biocrude, and N-containing compounds were increased as the reaction temperature elevated. The maximum biocrude oil yield obtained was 55.0% (w/w) at 350℃ at 40 min reaction time, and the yield of energy returned as a biocrude was 80% of total energy in the starting biomass. |
