汽车破碎残留物可燃组分热解过程交互作用研究

Study on Interaction of Combustible Components of Automotive Shredder Residue During Pyrolysis

采用热重质谱联用(TG-MS)和分布活化能模型(DAEM)对汽车破碎残留物中典型可燃组分塑料、纺织品、皮革和海绵共热解过程的交互作用进行研究,从热解失重特性、动力学特性和产气特性方面进行讨论。结果表明:比较单组分线性加权拟合数据和混合热解实验数据发现,4种组分间均存在交互作用。纺织品/皮革、海绵/塑料、海绵/纺织品共热解过程活化能平均值较拟合结果分别降低22.2、25.7、33.4 kJ/mol,海绵/皮革共热解过程活化能平均值较拟合结果增加7.9 kJ/mol。海绵的参与能够促进混合样品生成更多的小分子气体,皮革、纺织品和海绵共热解会阻碍塑料发生不规则断链反应生成C2H4和C3H8等小分子烃类。

The interaction of co-pyrolysis of plastic,textile,leather and sponge,which were typical combustible components of automotive shredding residues,was investigated using thermogravimetry-mass spectrometry(TG-MS)and distributed activation energy model(DAEM).The characteristics of pyrolysis weight loss,kinetics and gas production were discussed.The results indicated that interactions existed among all four components,as evidenced by a comparison of the single-component linear weighted fit data and the mixed pyrolysis experimental data.Specifically,the average activation energy of textile and leather,sponge and plastic,sponge and textile co-pyrolysis decreased by 22.2,25.7 and 33.4 kJ/mol,respectively.In contrast,the average activation energy of sponge and leather co-pyrolysis increased by 7.9 kJ/mol.The participation of sponge could promote the generation of small molecule gases in the mixed sample,while leather,textile and sponge co-pyrolysis could prevent the irregular chain-breaking reaction of plastic to generate small molecule hydrocarbons such as C2H4 and C3H8.