燃料化学学报（中英文）2025，Vol.53Issue(4)：602-612,中插3-中插10,19.DOI:10.1016/S1872-5813(24)60504-9
聚对苯二甲酸乙二醇酯废塑料的热解聚及其在配煤炼焦中的应用
Thermal depolymerization of polyethylene terephthalate waste and its use in coal-blending coking
摘要
Abstract
This work proposed a strategy to improve the caking index of polyethylene terephthalate(PET)waste,in which low-temperature pyrolysis treatment(LTPT)was used to depolymerize PET waste.The mechanism of G modification was revealed combining thermogravimetric(TG)analysis,Fourier transform infrared spectroscopy,pyrolysis-gas chromatography with mass spectrometric detection,and solid-state 13C nuclear magnetic resonance spectroscopy.Furthermore,crucible coking experiments were also conducted using industrial coal mixture and treated PET with the optimum G(PET300)or raw PET to evaluate the applicability of PET waste in coal-blending coking.According to characterization results of coke reactivity(CR),coke strength after reaction(CSR)indices,TG-related curves,pore volumes,and Raman spectra of the resultant cokes,LTPT could greatly increase the G of PET,and the optimum temperature was 300℃.Specifically,compared with the coke obtained from the blend with PET,the CR of the coke produced from the blend with PET300 decreased by 4.9%,whereas the CSR of the increased by 7.4%,suggesting that LTPT could increase the proportion of PET used for coal-blending coking.The improvement in G is attributed to the changes in C‒O/C=O ratio,aliphatic H and aromaticity caused by LTPT.关键词
聚对苯二甲酸乙二醇酯/热解/黏结性指数/结焦性能Key words
polyethylene terephthalate/pyrolysis/caking index/coking property分类
化学化工引用本文复制引用
方世仙,宋欢,刘祥春,崔平..聚对苯二甲酸乙二醇酯废塑料的热解聚及其在配煤炼焦中的应用[J].燃料化学学报（中英文）,2025,53(4):602-612,中插3-中插10,19.基金项目
The project was supported by the National Natural Science Foundation of China(22308006,22278001)and the Natural Science Foundation of Anhui Provincial Education Department(KJ2021A0407). （22308006,22278001）
