Double metal cyanide complex as a heterogeneous catalyst for depolymerization of polyesters

IF 5.2 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today Pub Date : 2025-02-20 DOI:10.1016/j.cattod.2025.115241

Tong Chang , Yujia Wang , Zhenjiang Li, Yongzhu Hu, Na Shi, Xin Zou, Chunyu Li, Yue Xu, Ning Li, Kai Guo

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引用次数: 0

Abstract

Plastic wastes have caused a series of environmental issues, and it has become imperative to promote the recycling of them. As an effective means to solve environmental problems and resource utilization, the chemical depolymerization of polyester via transesterification reaction was practical. Therefore, finding industrially viable transesterification catalysts is an effective strategy for establishing a recycling route for polyester plastics. Herein, we report double metal cyanide complex (DMC) directly catalyze polyester depolymerization to recover the corresponding monomers or chemicals. Poly(ethylene terephthalate) (PET) was used as representative polyester to investigate the influences of experimental conditions including the loading of the catalyst and the molar ratio of ethylene glycol (EG) to PET on the depolymerization of polyester and the selectivity of monomeric products. The kinetics of the glycolysis has been measured. PET could be completely depolymerized at 190 °C by 2 h with the molar ratio of EG/PET of 15 : 1 and the catalyst loading of 1 wt%. DMC also showed high catalytic activity on the depolymerizations of other commercial plastics of ester main-chains. DMC, a solid catalyst enjoyed inexpensive, robust, and water tolerant features in industrial process, showed prominent activity and selectivity in polyester depolymerizations and suggested scale commercial application scenario.

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来源期刊

Catalysis Today 化学-工程：化工

CiteScore

11.50

自引率

3.80%

发文量

573

审稿时长

2.9 months

期刊介绍： Catalysis Today focuses on the rapid publication of original invited papers devoted to currently important topics in catalysis and related subjects. The journal only publishes special issues (Proposing a Catalysis Today Special Issue), each of which is supervised by Guest Editors who recruit individual papers and oversee the peer review process. Catalysis Today offers researchers in the field of catalysis in-depth overviews of topical issues. Both fundamental and applied aspects of catalysis are covered. Subjects such as catalysis of immobilized organometallic and biocatalytic systems are welcome. Subjects related to catalysis such as experimental techniques, adsorption, process technology, synthesis, in situ characterization, computational, theoretical modeling, imaging and others are included if there is a clear relationship to catalysis.