聚对苯二甲酸乙二醇酯
氯化胆碱
共晶体系
深共晶溶剂
催化作用
溶剂
化学
选择性
有机化学
分解
聚乙烯
产量(工程)
化学工程
材料科学
复合材料
工程类
合金
作者
Geon-Soo Ha,Md Al Mamunur Rashid,Da Hae Oh,Jeong‐Myeong Ha,Chun‐Jae Yoo,Byong‐Hun Jeon,Bonwook Koo,Keunhong Jeong,Kwang Ho Kim
标识
DOI:10.1016/j.wasman.2023.12.028
摘要
To achieve a sustainable and circular economy, developing effective plastic recycling methods is essential. Despite advances in the chemical recycling of plastic waste, modern industries require highly efficient and sustainable solutions to address environmental problems. In this study, we propose an efficient glycolysis strategy for post-consumer polyethylene terephthalate (PET) using deep eutectic solvents (DESs) to produce bis(2-hydroxyethyl) terephthalate (BHET) with high selectivity. Choline chloride (ChCl)- and urea-based DESs were synthesized using various metal salts and were tested for the glycolysis of PET waste; ChCl–Zn(OAc)2 exhibited the best performance. The DES-containing solvent system afforded a complete PET conversion, producing BHET at a high yield (91.6%) under optimal reaction conditions. The degradation mechanism of PET and its interaction with DESs were systematically investigated using density functional theory-based calculations. Furthermore, an intuitive machine learning model was developed to predict the PET conversion and BHET selectivity for different DES compositions. Our findings demonstrate that the DES-catalyzed glycolysis of post-consumer PET could enable the development of a sustainable chemical recycling process, providing insights to identify the new design of DESs for plastic decomposition.
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