Pyrolysis Characteristic and Kinetic of Sawdust-Polypropylene Blend

Pyrolysis Characteristic and Kinetic of Sawdust-Polypropylene Blend
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木屑-聚丙烯共混物的热解特性及动力学

DOI:
10.1080/15567030701530313
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发表时间:
2009-01
影响因子:
2.9
通讯作者:
Kim, H. J.
Kim, H. J.
中科院分区:
工程技术4区
文献类型:
--
作者:
Han, J.;Kim, H. J.

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摘要利用热重分析仪研究了木屑和聚丙烯的热解特性。实验结果表明,木屑的热降解过程可分为三个阶段:脱水、纤维素或半纤维素分解和木质素的脱挥。而聚丙烯的分解比木屑简单,木屑在660 K以上才开始分解。在660-800 K温度范围内,由于化学键的断裂,热解过程迅速完成.根据实验结果计算了木屑和聚丙烯的动力学参数。木屑的热解过程可以用三个相互独立的一级反应来模拟,预测结果与实验数据吻合较好。聚丙烯的分解反应可以用一级反应来描述。对于共混物,我们认为木屑与聚丙烯在热解过程中没有发生相互作用。仿真结果与实验结果的对比验证了上述假设。
Abstract The pyrolysis characteristics of sawdust and polypropylene are studied using a thermogravimetric analyzer. The experimental results show that the thermal degradation of sawdust can be divided into three stages: dehydration, cellulose or semicellulose decomposition, and the devolatilization of lignin. While the decomposition of polypropylene is simpler than that of sawdust, which is not decomposed until temperature is above 660 K. Meanwhile, the pyrolysis process is rapidly completed due to the chemical bonds broken at 660–800 K. The kinetic parameters of sawdust and polypropylene are calculated on the basis of the experimental results. The pyrolysis of sawdust was successfully modeled by three independent, first order reactions, and the predicted results well match the experimental data. The decomposition of polypropylene can be described through only a first order reaction. As for the blend, we think that there is no interreaction between sawdust and polypropylene during pyrolysis. The comparison of the simulated and experimental results proves the above assumption.
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