| 초록 |
We investigated pyrolysis characteristics of wild –type (WT) and transgenic (TP) hybrid poplar trees by thermogravimetric analysis (TGA) and isothermal pyrolysis in a micro-tubing reactor. TGA results reveal that 80 wt. % was decomposed from 415 to 700 K for both of WT and TP samples. Activation energy was estimated by model free KAS and FWO methods. Accordingly, the obtained activation energy of TP was lower than that of WT sample for both of KAS and FWO methods. Isothermal decomposition experiments in micro-tubing reactor were conducted at various temperature (360~400 oC) and time (1~5 min). The maximum yield of bio-oil for WT and TP were 45.88 and 53.21 wt. %, respectively, obtained at 400 oC and 3 min. A reaction network and quantitative kinetic model were proposed for pyrolysis of WT and TP samples. The experimental and calculated data were minimized by utilizing a MATLAB optimization function. Obtained results show that the model was in agreement with the experimental data. The kinetic parameters for each reaction pathway from the model were used to explore the parameter space in order to predict product yields as a function of reaction time and temperature. |
