Packaging waste such as beverage carton forms a significant part of municipal solid waste and its pyrolysis behavior, kinetics, and thermodynamics were studied. A four-stage decomposition process was revealed: dehydration below 200 ℃, paperboard degradation at 200–400 ℃, polyethylene devolatilization at 400–550 ℃, and inorganic decomposition at 550–900 ℃. The evolved products included furans and acetic acid during stage II, followed by the presence of 2-butene and 1-pentene in the subsequent stage. Apparent activation energy (Ea) were determined using model-free models, revealing a notable level of comparability among these results. The average Ea was 123.6 kJ/mol within α range of 0.10–0.60, increasing to 233.3 kJ/mol beyond that range. The most probable reaction mechanism was determined, with the one-dimensional model proving more reliable. An artificial neural network model was developed to predict the thermal degradation. The selected topology of 5*15*1 displayed a robust ability to predict the thermal data.

中文翻译：

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二氧化碳气氛下多层包装废物的热解转化：热动力学研究、进化产品分析和人工神经网络建模


饮料纸盒等包装废物是城市固体废物的重要组成部分，对其热解行为、动力学和热力学进行了研究。揭示了四阶段分解过程：200℃以下脱水，200-400℃纸板降解，400-550℃聚乙烯脱挥，550-900℃无机分解。在阶段 II 中放出的产物包括呋喃和乙酸，随后在后续阶段中出现 2-丁烯和 1-戊烯。表观活化能（Ea）是使用无模型模型确定的，揭示了这些结果之间显着的可比性。在 0.10-0.60 的 α 范围内，平均 Ea 为 123.6 kJ/mol，超出该范围增加至 233.3 kJ/mol。确定了最可能的反应机理，一维模型被证明更可靠。开发了人工神经网络模型来预测热降解。所选的 5*15*1 拓扑显示出强大的热数据预测能力。