【摘要】 为了研究废弃聚乙烯在连续型反应器中的热解过程，在放置多孔陶瓷的立式管式炉中进行了废弃聚乙烯的热解实验，建立了基于一维平推流的废弃聚乙烯热解的流动–化学反应模型，同时基于该模型和实验结果进行了化学动力学建模，并使用遗传算法进行反应动力学参数求解。结果表明，平推流模型能够准确描述管式炉中废弃塑料的热解过程；与间歇式反应装置相比，多孔介质使得初级热解表观的反应速率增大了7个数量级，同时次级热解的反应速率也增加了3～5倍不等。此外得到的动力学模型在一定范围内可以很好地预测管式炉中废弃塑料热解的产物，其预测不同载气速率的结果与实验最大误差为6.18%；且与二维回转体模型相比，其各组分收率最大误差为9.65%。更多还原

【Abstract】 To investigate the pyrolysis of waste polyethylene(PE) in a continuous reactor,pyrolysis experiments were conducted in a vertical tubular furnace packed with porous ceramics.A onedimensional plug flow reactor(PFR) model was established to describe the pyrolysis of waste PE.Based on this model and experimental data,a lumped kinetic model was developed,and the reaction parameters were estimated using genetic algorithm(GA).The results demonstrated that the PFR model accurately captured the pyrolysis of waste PE in the reactor.Compared with batch reactors,the presence of porous media increased the apparent primary pyrolysis rate by at least 7 orders of magnitude,and enhanced the secondary pyrolysis rate by 3～5 times.Furthermore,the developed kinetic model effectively predicted the product distribution within a specific range.The maximum deviation between the predictions and experimental results under different carrier gas flow rates is6.18%,while the maximum deviation from the two-dimensional axisymmetric model is 9.65%.更多还原