Department of Chemical Engineering, National Institute of Technology, Warangal 506004, AP, India.
Department of Chemical Engineering, National Institute of Technology, Warangal 506004, AP, India.
Bioresour Technol. 2015 Feb;178:126-131. doi: 10.1016/j.biortech.2014.10.028. Epub 2014 Oct 14.
The pyrolysis characteristics of municipal solid waste, agricultural residues such as ground nut shell, cotton husk and their blends are investigated using non-isothermal thermogravimetric analysis (TGA) with in a temperature range of 30-900 °C at different heating rates of 10 °C, 30 °C and 50 °C/min in inert atmosphere. From the thermograms obtained from TGA, it is observed that the maximum rate of degradation occurred in the second stage of the pyrolysis process for all the solid wastes. The distributed activation energy model (DAEM) is used to study the pyrolysis kinetics of the solid wastes. The kinetic parameters E (activation energy), k0 (frequency factor) are calculated from this model. It is found that the range of activation energies for agricultural residues are lower than the municipal solid waste. The activation energies for the municipal solid waste pyrolysis process drastically decreased with addition of agricultural residues. The proposed DAEM is successfully validated with TGA experimental data.
采用非等温热重分析（TGA），在惰性气氛中以 10°C、30°C 和 50°C/min 的不同加热速率在 30-900°C 的温度范围内研究了城市固体废物、落花生壳、棉绒等农业废弃物及其混合物的热解特性。从 TGA 得到的热谱图中，可以观察到所有固体废物的热解过程的第二阶段的最大降解速率。采用分布活化能模型（DAEM）研究了固体废物的热解动力学。从该模型计算了动力学参数 E（活化能）和 k0（频率因子）。发现农业残留物的活化能范围低于城市固体废物。随着农业残留物的加入，城市固体废物热解过程的活化能急剧降低。所提出的 DAEM 成功地用 TGA 实验数据进行了验证。
