外卖塑料包装热解动力学研究——基于无模型和模型拟合法

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Abstract Thermogravimetric analysis for components of takeaway plastic packaging was carried out under non-isothermal conditions. The results showed that the pyrolysis processes of the single components of PP, HDPE, PS, and the mixture (PP/HDPE/PS) were finished in one step. For the complex pyrolysis reaction with mixed plastics, a model-free method combined with the model-fitting method was proposed to obtain the complete set of kinetic parameters, which made the results more reliable. The kinetic parameters of a single component and the mixture in the pyrolysis process were studied with model-free methods (K-A-S, F-W-O and Starink). In pyrolysis processes, the average activation energy (E) of PP, HDPE, PS and PP/HDPE/PS reached 224.7, 238.5, 194.1 and 179.3kJ/mol, respectively. Based on the activation energy obtained by the model-free method and the results of model fitting (Malek and C-R), the pyrolysis mechanism of a single component and the mixture was random nucleation followed by growth when the heating rate was 20K/min. Moreover, the compensation effect between the kinetic parameters was analyzed to establish the compensation effect equations. This study can provide support for the optimization of the pyrolysis process parameters of takeaway plastic waste and the design of the pyrolysis reactor.

Key words： takeaway packing pyrolysis characteristics kinetic parameters pyrolysis mechanism compensation effect

Received: 08 September 2020

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X705

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	YIN Feng-fu
	ZHUANG Qian-xiao
	CHANG Tian-hao
	SUN Qi-kun

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YIN Feng-fu,ZHUANG Qian-xiao,CHANG Tian-hao等. Pyrolysis kinetics study of takeaway plastic packaging—Based on model-free and model-fitting method[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(4): 1756-1764.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I4/1756

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