Kinetics and Synergistic Effects in the Pyrolysis Process of Hybrid Plastics and Product Analysis

Pyrolysis technology serves as an effective method for the treatment of organic solid waste and yields sub- stantial value. This study examines the pyrolysis characteristics, kinetic parameters, synergistic effects, and products derived from the pyrolysis of polystyrene (PS) and polyvinyl chloride (PVC) used as raw materials. The results demonstrate that the initial and final pyrolysis temperatures of mixed PS and PVC are significantly lower than those observed in the pyrolysis of either material alone. The kinetic analysis reveals that the average activation energy required for the mixed PS/PVC pyrolysis is greater than that for PS alone but less than that for PVC alone, indicating synergistic effects in the mixed pyrolysis process. These synergistic effects predominantly exert a positive impact. Additionally, the study of pyrolysis products shows that the rate of gas production in the mixed PS/PVC pyrolysis is markedly increased compared to individual pyrolysis processes, with the actual gas yield exceeding the theoretical yield by 7.90%. These results provide essential theoretical and empirical support for the industrial application of pyrolysis processes involving PS, PVC, and their mixtures.