Study on co-pyrolysis characteristics and kinetics of waste PE and PET plastics
The cap(PE)and body(PET)of the discarded 550 mL mineral water bottle of Nongfu Spring were used as raw materials.The laboratory-scale fixed-bed reactor and thermogravimetric analyzer were used to conduct pyrolysis ex-periments to explore the synergistic effects of co-pyrolysis of waste PE and PET plastics and the kinetic behaviors in which co-pyrolysis process was separated into two degradation stages.The results showed that co-pyrolysis of PE and PET plastics promoted the production of liquid pyrolysis oil and improving the selectivity of hydrocarbons in pyrolysis oil.When the mixing ratio of PE and PET was 2∶1,the highest pyrolysis oil yield of 84.72％was achieved.The incre-ment of pyrolysis temperature promoted the occurrence of secondary reactions like Diels-Alder and aromatization reac-tions,generating more aromatic products.The average apparent activation energies of the two degradation stages of co-pyrolysis process were 191.05 kJ/mol and 215.22 kJ/mol.The reaction mechanisms of these two stages were aligned with order-based model and contracting volume(R3)model,respectively.
万方数据
维普
