Comparative study on combustion kinetic characteristics of powderyand granular woody fuel

作者：Peng, Haobin; Chen, Guohua^*; Li, Yunquan; Li, Yuesheng; Jiang, Zhiming; Yu, Mengquan

来源：Acta Energiae Solaris Sinica, 2017, 38(1): 53-59.

• Biomass fuels
• Combustion mechanism
• Double-step
• Kinetic characteristics
• Most probable mechanism functions
• Orders of magnitude
• Thermalgravimetric analysis
• Thermogravimetric analyzers

In order to distinguish the difference of combustion kinetic characteristics between the powdery and granular biomass fuel made of the same wood, some experiments were conducted in thermogravimetric analyzer(TGA)and tube furnace system(TFS), respectively. The corresponding kinetic parameters of these two kinds of fuel were determined and discussed by using double-step-and-double-equal and isothermal methods. The results showed that the most probable mechanism functions of these two kinds of fuel were not the same due to the differences in internal heat and mass transfer properties. However, the combustion mechanism of the powdery material kept consistent through the whole process, while there is a significant difference in the combustion mechanisms between the volatile and char combustion stages of the granular material. The activation energy values of powdery and granular biomass fuel are 92.33 kJ/mol and 71.20 kJ/mol respectively, while the frequency factor of the powdery fuel(2.55×108s-1)is far greater than the other one(78.55 s-1), differed by 7 orders of magnitude.

• 出版日期2017-1-28
• 单位华南理工大学