ZnO nanodispersion as pseudohomogeneous catalyst for alcoholysis of polyethylene terephthalate

被引：118

作者：

Du, Jin-Tao ^{[1
,2
]}

Sun, Qian ^{[1
]}

Zeng, Xiao-Fei ^{[2
]}

Wang, Dan ^{[1
,2
]}

Wang, Jie-Xin ^{[1
,2
]}

Chen, Jian-Feng ^{[1
,2
]}

机构：

[1] Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China

[2] Beijing Univ Chem Technol, Res Ctr, Minist Educ High Grav Engn & Technol, Beijing 100029, Peoples R China

来源：

CHEMICAL ENGINEERING SCIENCE | 2020年 / 220卷

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

POLY(ETHYLENE-TEREPHTHALATE); PET; DEPOLYMERIZATION; NANOPARTICLES; GLYCOLYSIS; KINETICS; WASTE; REMOVAL; CARBON; METHANOLYSIS;

D O I：

10.1016/j.ces.2020.115642

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Chemical depolymerization and recycling of polyethylene terephthalate (PET) is a sustainable way to preserve the resources and protect the environment. In this work, methanol and ethylene glycol dispersions of ultrasmall ZnO nanoparticles are firstly adopted as pseudohomogeneous catalysts for alcoholysis of PET. The as-prepared ZnO nanoparticles have a uniform size of 4 nm and can be stable in dispersions for 6 months. In the methanolysis process of PET, the effects of various parameters on the conversion of PET and the yield of dimethyl terephthalate (DMT) were investigated. The results show that higher temperature (170 °C) was beneficial to the conversion of PET and the yield of DMT, which can reach about 97% and 95% after 15 min, respectively. The excellent activity of 553 g PET h−1 (g ZnO)−1 was achieved. Furthermore, the methanolysis of PET have shorter reaction time (1/4) and higher activity (4.7 times) than the glycolysis of PET. © 2020 Elsevier Ltd

引用

页数：10

共 47 条

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