摘要
使用废弃农夫山泉550 mL矿泉水瓶的瓶盖(PE)与瓶身(PET)作为原料。采用实验室规模固定床反应器和热重分析仪进行热解实验,探究废塑料PE与PET共热解的协同效应,并在失重阶段尺度上研究共热解反应的动力学特性。结果表明,PE与PET共热解可以促进热解油的生成,提升热解油中碳氢化合物的选择性;当PE与PET掺混比例为2∶1时,热解油产率最高为84.72%;热解温度的升高促进“双烯合成”与芳构化等二次反应的发生,生成更多的芳烃类产物;PE与PET共热解过程中两个失重阶段的平均表观活化能分别为191.05 kJ/mol和215.22 kJ/mol,反应机理分别符合反应阶数机理函数模型和收缩体函数机理模型。
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.
作者
罗冠群
赵乐
潘雅琪
LUO Guanqun;ZHAO Le;PAN Yaqi(Cryogenic Center,Hangzhou City University,Hangzhou 310015,China;Department of Energy and Environment System Engineering,Zhejiang University of Science and Technology,Hangzhou 310023,China)
出处
《中国塑料》
CAS
CSCD
北大核心
2024年第3期86-93,共8页
China Plastics
基金
国家自然科学基金青年科学基金项目(52006196)
浙江省自然科学基金探索项目(LTGS23E060001)。
