关键词: 生物柴油, 热解, 热重-傅里叶变换红外光谱联用, 非预置模型法

Abstract: The pyrolysis characteristic of biodiesel was investigated by the thermogravimetric coupled with the Fourier transform infrared spectroscopy，where the composition of the released gas was also determined. Further，the model free approach of the Vyazovkin method and the Avrami theory were used to calculate the activation energy and the reaction order，respectively. The mass loss segment existed from 554K to 773K during the biodiesel pyrolysis process and the accompanied mass loss percentage was about 87.59%. During the pyrolysis，the gas released mainly included CO2、H2O、CH4 and other organic compounds. The main gases showed consistent regularity but with different density. Meanwhile，as temperature heating rate increased，the decomposition process was shifted to the higher temperature zone. Calculations of the kinetic parameters demonstrated the multistage and the complicated characteristics of the biodiesel pyrolysis，where the variation for the activation energy was from 100.48kJ/mol to 151.14kJ/mol and for the reaction order was from 1.21 to 1.24.

Key words: biodiesel, pyrolysis, thermogravimetric-Fourier transform infrared spectroscopy, model free approach