糠醛渣热解特性的研究

以糠醛渣为研究对象,应用热重分析法,以高纯氮气为载气对其进行了详细的热重分析试验。结果表明糠醛渣热解随温度升高经历五个不同阶段,表现了糠醛渣热解的复杂性。通过对5 ℃/min、20 ℃/min、50 ℃/min和80 ℃/min的升温速率及不同粒径下的失重曲线进行的对比表明,随着升温速率和粒径的增大,糠醛渣热解的初始温度增大,热解向高温侧移动。最后根据实验数据建立了热解动力学模型,并对数学模型进行了求解,得到了糠醛渣热解反应的动力学参数,表明糠醛渣热解属三级反应。

STUDY ON THE PYROLYSIS PROPERTIES OF FURFURAL RESIDUES

The thermogravimetric analysis was used to study the pyrolysis characteristics of furfural residues. The result showed that furfural residues pyrolysis process had five distinct phases with increasing temperature. TG and DTG analysis and comparison were used to study the pyrolysis of furfural residues at different heating rate (5℃/min, 20℃/min, 50℃/min and 80℃/min) and different particle size distribution in a stream of N2. It showed that the beginning temperature of pyrolysis rose with the heating rate and particle size distribution increasing. Based on the experimental data, a pyrolysis kinetics model was proposed and the related kinetics parameters of furfural residues pyrolysis were determined. The results indicated that the pyrolysis process can be described by three-order model. These conclusions provided a theoretical foundation for further research on combustion and gasification of furfural residues.