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Research Article | Open Access

Efficient catalytic conversion of polyethylene terephthalate to dimethyl terephthalate over mesoporous Beta zeolite supported zinc oxide

Xiaoxue Mu1,#, Dongquan Lin1,#, Jian Zhang1 ( ), Xiaoyuan Qin1, Jianbin Huang1, Feng-Shou Xiao1,2 ( )
Beijing Advanced Innovation Center for Soft Matter, Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China

#Xiaoxue Mu and Dongquan Lin contributed equally to this work.

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Abstract

Methanolysis of polyethylene terephthalate to dimethyl terephthalate is a sustainable route for recycling of polyethylene terephthalate (PET) plastic. Herein, we demonstrate that mesoporous Beta zeolite supported zinc oxide (Zn-Beta-meso) is efficient for methanolysis of polyethylene terephthalate to dimethyl terephthalate, exhibiting ~ 99.9% dimethyl terephthalate yield at 180 °C after reaction for 30 min. Model reactions confirmed that the key step in PET methanolysis was the methanolysis of 2-hydroxyethyl methyl terephthalate to form dimethyl terephthalate, where the highly dispersed zinc species are the active sites for this step. In addition, the Zn-Beta-meso catalyst was active for the methanolysis of various PET substrates. When bottle with pigment, terylene, transparent adhesive tape, and soundproof cotton were applied as the substrates, full PET conversion and higher than 99.0% dimethyl terephthalate yield were obtained.

Graphical Abstract

Mesoporous Beta zeolite supported zinc oxide is efficient for methanolysis of polyethylene terephthalate to dimethyl terephthalate, exhibiting ~ 99.9% dimethyl terephthalate yield for the conversion of various polyethylene terephthalate (PET) substrates.

Keywords

mesoporous zeolitezinc speciespolyethylene terephthalatemethanolysisdimethyl terephthalate

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Carbon Future
Volume 2 Issue 2,
June 2025
Article number: 9200039
DOI: 10.26599/CF.2025.9200039

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Cite this article:
Mu X, Lin D, Zhang J, et al. Efficient catalytic conversion of polyethylene terephthalate to dimethyl terephthalate over mesoporous Beta zeolite supported zinc oxide. Carbon Future, 2025, 2(2): 9200039. https://doi.org/10.26599/CF.2025.9200039
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Received: 26 December 2024
Revised: 06 January 2025
Accepted: 11 February 2025
Published: 06 March 2025
© The author(s) 2025. Published by Tsinghua University Press.

Open AccessThis article is licensed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, sharing, distribution and reproduction in any medium, provided the original work is properly cited.