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首页> 外文期刊>The Canadian Journal of Chemical Engineering >KINETIC ANALYSIS AND MODELLING OF THERMAL DEGRADATION OF PERSPEX (PMMA) AND PERSPEX BLEND PLASTIC WASTE
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KINETIC ANALYSIS AND MODELLING OF THERMAL DEGRADATION OF PERSPEX (PMMA) AND PERSPEX BLEND PLASTIC WASTE

机译：树脂（PMMA）和树脂混合塑料废料热降解的动力学分析和建模

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The thermal decomposition of pure perspex and a mixture of 50% perspex and 50% poly(ethylene terephthalate; PET) was carried out between 295 and 325°C using a thermogravimetric analyser (TCA) in air and nitrogen (N2) atmosphere. The weight losses of decomposition products were measured during these experiments. The thermal degradation process is slower in inert atmosphere than air, where oxidation reaction expedites the decomposition process. Kinetic rate constants (k), pre-exponential factor (A) and activation energy (E) for both pure prespex and a blend of perspex/PET were calculated for both air and N2 conditions. The thermal degradation process followed a third-order reaction in air and second-order in N2. A second-order (n=2) model for the pyrolytic process based on simultaneous reactions was developed using experimental data for pure and blend. The pyrolytic products are gases, liquids, waxes, aromatics and char, which can be ultimately used as raw material and fuel in various applications. It is important to note that the addition of PET to perspex was found to suppress/inhibit the decomposition of perspex compared with pure perspex. Pre-exponential factor (A) and activation energy (E) values support such an observation.
机译：在空气和氮气（N2）气氛中，使用热重分析仪（TCA）在295至325°C下对纯有机玻璃以及50％有机玻璃和50％聚对苯二甲酸乙二醇酯（PET）的混合物进行热分解。在这些实验中测量了分解产物的重量损失。在惰性气氛中，热降解过程比空气要慢，在空气中氧化反应会加快分解过程。在空气和氮气条件下，都计算出了纯天然预浸料和有机玻璃/ PET混合物的动力学速率常数（k），指数前因子（A）和活化能（E）。热降解过程遵循空气中的三级反应和氮气中的二阶反应。使用纯和共混物的实验数据，开发了基于同时反应的热解过程的二阶（n = 2）模型。热解产物是气体，液体，蜡，芳烃和焦炭，它们最终可以在各种应用中用作原材料和燃料。重要的是要注意，与纯有机玻璃相比，发现在有机玻璃中添加PET可以抑制/抑制有机玻璃的分解。前指数因子（A）和活化能（E）值支持这种观察。

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