各種プラスチック粉末の熱分解反応に関する研究

抄録

In this study, thermogravimetory and differential thermal analysis (TG-DTA), time course of temperature and generated gas flow rate during pyrolysis of polystyrene (PS), polyethylene (PE) and polypropylene (PP) powders have been investigated using an isothermal reactor. From the results of TG-DTA, the pyrolysis was endothermic reaction for all samples and there was no char after pyrolysis at 1200 °C as with previous studies. Time course of temperature for plastic powder packed bed had a plateau because of the endothermic chemical reaction. The maximum gas flow rate for PS was slower than that for PE and PP. Mass of tar for PS didn't change with temperature while those for PE and PP decreased with one. In other words, the secondary decomposition of tar could not occurred for PS because a styrene monomer with a benzene ring, which was required a large energy to decompose into other small molecular substances, would be formed after PS pyrolysis.