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Pyrolysis of Miscanthus Giganteus and wood pellets: TG-FTIR analysis and reaction kinetics

机译：芒草和木质颗粒的热解：TG-FTIR分析和反应动力学

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摘要

Characterisation of two biomass fuels (pelletised Miscanthus Giganteus and wood) was performed using thermogravimetric analysis with measurement of products by means of Fourier transform infrared spectroscopy (TG-FTIR). Three heating rate profiles were applied (10, 30 and 100 ℃/min), with a final temperature of 900 ℃. HCN and HNCO were found to be the major N-products, while the NH_3 fraction was detected to a minor extent. Kinetic parameters were obtained from the TG-FTIR results using a model based on parallel first-order reactions with a Gaussian distribution of activation energies. On the basis of the above kinetic analysis and product yields, input files for the functional group-devolatilisation, vaporisation, cross-linking biomass-pyrolysis model were prepared. The fit of model parameters to TG-FTIR product-evolution data was found to be generally good, but the model-predicted yields for some species did not fit experimental data at all heating rates. Further improvements in the model are needed to resolve above difficulty.
机译：使用热重分析对两种生物质燃料（粒化的芒草和木材）进行表征，并通过傅立叶变换红外光谱法（TG-FTIR）测量产品。施加三个加热速率曲线（10、30和100℃/ min），最终温度为900℃。 HCN和HNCO被认为是主要的N产物，而NH_3馏分的检测程度很小。使用基于平行一阶反应和活化能高斯分布的模型，从TG-FTIR结果获得动力学参数。基于上述动力学分析和产物收率，制备了官能团-脱挥发分，汽化，交联生物质-热解模型的输入文件。发现模型参数与TG-FTIR产物演化数据的拟合度通常很好，但是某些物种的模型预测产量并不适合所有加热速率的实验数据。该模型需要进一步改进以解决上述困难。

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