Abstract Isothermal pyrolysis characteristics of typical technical solid wastes (polyethylene, paper towel and textiles, and their mixture with a blending ratio of 4:1:1) were carried out in a fixed bed between 475 °C and 550 °C. The influence of the temperature on the pyrolysis index, kinetic parameters and products of the samples was addressed. The interaction between the three individuals during their co-pyrolysis was identified. As the temperature was from 475 °C to 550 °C, the pyrolysis index of the polyethylene increased by about 78 times, while that for paper towel and textiles only increased by about 1 and 6 times, respectively. Solid residues from the mixture pyrolysis were about 11.6 % wt. More alkanes and alkenes were in liquid products of the mixture. The shrinking core model would represent well the mixture pyrolysis. The pre-exponential factor of polyethylene was much higher than other two individuals. There was a significant synergistic effect detected for mixture during the co-pyrolysis. The pyrolysis of mixture was dominated by a third order reaction mechanism. This study can provide basic data for the thermal treatment of solid waste in nuclear power plants.

中文翻译：

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典型工业固体废物等温热解特性评价

摘要 在475～550℃的固定床中对典型工业固体废物（聚乙烯、纸巾和纺织品，以及它们的混合比例为4:1:1）等温热解特性进行了研究。讨论了温度对样品热解指数、动力学参数和产物的影响。确定了三个个体在共热解过程中的相互作用。当温度从 475°C 到 550°C 时，聚乙烯的热解指数增加了约 78 倍，而纸巾和纺织品的热解指数仅分别增加了约 1 倍和 6 倍。来自混合物热解的固体残余物为约11.6重量％。更多的烷烃和烯烃存在于混合物的液体产物中。收缩核心模型将很好地代表混合物热解。聚乙烯的指数前因子远高于其他两个人。在共热解过程中检测到混合物具有显着的协同效应。混合物的热解以三级反应机制为主。该研究可为核电厂固体废物的热处理提供基础数据。