| 초록 |
In this study, the microalga Tetraselmis sp. was investigated the hydrothermal liquefaction (HTL) characteristics at various reaction temperatures (250~350 oC) and reaction times (10~60 min). The results show that yields of heavy oil (HO) (n-hexane insoluble), light oil (LO) (n-hexane soluble), aqueous-phase (AP), and gas were strongly affected by HTL conditions. The highest yield of total biocrude reached 45.42 wt% at 350 oC and 10 min, in which HO and LO fractions were 30.35 and 15.07 wt%, respectively. A general reaction network and quantitative kinetic model were proposed for the HTL of microalgae. The experimental and calculated data were minimized by utilizing a MATLAB optimization function. Obtained results show that the model accurately captures the trend of the experimental data. Analyses of the kinetic parameters were performed to evaluate the dominant reaction pathways as well as the contribution of biochemical constituents to the biocrude yield. Finally, the kinetic parameters calculated from the model were utilized to explore the parameter space in order to predict liquefaction product yields. |
