过渡金属氧化物材料催化聚对苯二甲酸乙二醇酯甲醇解回收性能研究

高嘉诚; 杨磊; 苏敏; 蒲语凡; 贺嘉熙; 袁立; 王大军; 欧阳李科

doi:10.12434/j.issn.2097-2547.20250186

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过渡金属氧化物材料催化聚对苯二甲酸乙二醇酯甲醇解回收性能研究

更新时间：2025-07-14

- 过渡金属氧化物材料催化聚对苯二甲酸乙二醇酯甲醇解回收性能研究
- Study on recycling performances of polyethylene terephthalate methanolysis catalyzed by transition metal oxide materials
- 低碳化学与化工 2025: 1-13.
- 作者机构：
  
  1.四川大学化学工程学院，四川成都 610207
  2.西南化工研究设计院有限公司多孔材料与分离转化全国重点实验室，四川成都 610207
- 作者简介：
  
  高嘉诚（2000—），硕士研究生，研究方向为化学工程，E-mail：335782213@qq.com。
  欧阳李科（1987—），博士，副教授，研究方向为绿色化工、能源与环境催化反应工程，E-mail：Like.ouyang@scu.edu.cn。
- 基金信息：
  
  国家自然科学基金青年基金项目(22008158);四川省科技成果转移转化引导计划(2025ZHCG0017)
- DOI：10.12434/j.issn.2097-2547.20250186
  中图分类号： TQ085
- 收稿日期：2025-04-17，
  
  修回日期：2025-05-10，
  
  网络出版日期：2025-07-14，
- 稿件说明：
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高嘉诚,杨磊,苏敏等.过渡金属氧化物材料催化聚对苯二甲酸乙二醇酯甲醇解回收性能研究[J].低碳化学与化工,

GAO Jiacheng,YANG Lei,SU Min,et al.Study on recycling performances of polyethylene terephthalate methanolysis catalyzed by transition metal oxide materials[J].Low-Carbon Chemistry and Chemical Engineering,
高嘉诚,杨磊,苏敏等.过渡金属氧化物材料催化聚对苯二甲酸乙二醇酯甲醇解回收性能研究[J].低碳化学与化工, DOI：10.12434/j.issn.2097-2547.20250186.

GAO Jiacheng,YANG Lei,SU Min,et al.Study on recycling performances of polyethylene terephthalate methanolysis catalyzed by transition metal oxide materials[J].Low-Carbon Chemistry and Chemical Engineering, DOI：10.12434/j.issn.2097-2547.20250186.

摘要

聚对苯二甲酸乙二醇酯（PET）塑料大规模废弃引发的环境污染与资源浪费问题亟待解决，PET甲醇解技术因其低成本、高效闭环回收特性成为重要突破口。针对目前PET甲醇解催化剂存在的分离困难、稳定性不足及成本高昂等问题，聚焦结构简单稳定、成本低和易于回收的过渡金属氧化物（ZnO、MnO等）材料，进行了催化剂筛选、反应条件优化、循环稳定测试、构效关系和催化反应机制分析等研究。结果表明，在温度为180 ℃、ZnO用量（相对PET的质量分数）为10.0%、甲醇投料比为40 mL/g和反应时间为2 h的最优条件下，针对商业PET颗粒和消费后PET瓶片，PET解聚率均为100%，对苯二甲酸二甲酯产率分别为89.1%和91.0%。在10次循环反应中，ZnO可保持结构及催化性能稳定。在催化过程中，ZnO具有双活性位点（Zn

位点+缺陷氧位点）协同催化机制，ZnO良好的催化性能和稳定性与其丰富的双活性位点和本征稳定性有关。

Abstract

The problem of environmental pollution and resource waste caused by large-scale waste of polyethylene terephthalate (PET) plastics needs to be solved urgently. PET methanolysis technology has emerged as a crucial breakthrough due to its low cost and efficient closed-loop recovery characteristics. In view of the current problems such as difficult separation

insufficient stability and high cost of PET methanolysis catalysts

focusing on transition metal oxide (such as ZnO

MnO) materials with simple and stable structure

low cost and easy recovery

studies such as catalyst screening

reaction condition optimization

cycle stability testing

structure-activity relationship and catalytic reaction mechanism analysis were carried out. The results show that under the optimal conditions of temperature of 180 ℃

ZnO dosage (relative to PET mass fraction) of 10.0%

methanol feed ratio of 40 mL/g and reaction time of 2 h

for commercial PET particles and post-consumer PET bottle flakes

the PET depolymeriz

ation rates both are 100% and the dimethyl terephthalate yields are 89.1% and 91.0%

respectively. ZnO can maintain stable structure and catalytic performance throughout 10 cycling reactions. The catalytic process involves a synergistic mechanism utilizing dual active sites (Zn

sites + oxygen vacancy sites) on ZnO. The good catalytic performance and stability of ZnO are attributed to its abundance of dual active sites and intrinsic stability.

关键词

Keywords

references

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