Chemical recycling of plastic wastes via homogeneous catalysis: A review

被引:38
作者
Chen, Xueru [1 ,2 ]
Cheng, Leilei [1 ,2 ]
Gu, Jing [1 ,2 ]
Yuan, Haoran [1 ,2 ]
Chen, Yong [1 ,2 ]
机构
[1] Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
[2] Univ Sci & Technol China, Sch Energy Sci & Engn, Hefei 230026, Peoples R China
关键词
Homogeneous catalyst; Catalysis mechanism; Chemical recycling; Chemical depolymerization; Closed-loop recovery; ANHYDRIDE-CURED EPOXY; FIBER-REINFORCED COMPOSITES; CONTAINING IONIC LIQUIDS; CARBON-FIBER; POLYETHYLENE TEREPHTHALATE; SUPERCRITICAL WATER; SELECTIVE CLEAVAGE; RESIN COMPOSITES; CYCLIC CARBONATES; DEGRADATION;
D O I
10.1016/j.cej.2023.147853
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Improper disposal of plastic wastes causes serious negative impacts on the ecosystem. These plastic wastes are considered to be a rich carbon resource, and the use of homogeneous catalytic chemical recycling methods has enabled the high-value recovery of plastic wastes under mild conditions to obtain liquid fuels (alkane, cycloalkane and aromatic hydrocarbon etc.), high-value chemicals (terephthalic acid, bisphenol A and diols), and plastic monomers (bis(hydroxyalkyl) terephthalate). This review summarizes recent advances in homogeneous catalysis of plastic polymers for the preparation of high-value chemicals. The bond breaking mechanism of plastics using different homogeneous catalysts and the relationship between catalyst active sites and catalytic performance are systematically discussed in each section. Finally, we evaluate the current homogeneous catalytic chemical recycling routes for plastic wastes. Chemical recycling through homogeneous catalysis is a bright way to realize the circular economy of plastic wastes.
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页数:22
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