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Nano Research 2024, 17(6): 5645-5650 https://doi.org/10.1007/s12274-024-6475-y
Research Article | Issue | Published: 07 March 2024

High-efficiency Ce-modified ZSM-5 nanosheets for waste plastic upgrading

Show Author's Information Xiaomei Wang1,2,  Xueting Wu1,2,  Meng Zhao1,2,  Rui Zhang1,2,  Zijian Wang1,2,  Yuou Li1,2,  Liangliang Zhang1( ),  Xiao Wang1,2( ),  Shuyan Song1,2( ),  Hongjie Zhang1,2,3
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
Department of Chemistry, Tsinghua University, Beijing 100084, China
Keywords:
morphology, rare earth zeolite, plastic degradation, catalytic hydrocracking, acidic site
Topics:
Catalyst activityCatalystsZeolites
Cite this article:
Wang X, Wu X, Zhao M, et al. High-efficiency Ce-modified ZSM-5 nanosheets for waste plastic upgrading. Nano Research, 2024, 17(6): 5645-5650. https://doi.org/10.1007/s12274-024-6475-y
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Abstract Full text Electronic supplementary material About this article

Zeolite-based catalyst hydrocracking of plastics is a potential strategy for mitigating the environmental impacts of plastic wastes and recycling valuable resources, but difficult mass transfer, low concentration of acid sites, and high cost are still barriers to their practical applications. In this paper, we report an excellent hydrocracking catalyst of ZSM-5 nanosheets (Ce/b-ZSM-5) modified by Ce species with high conversion up to 96.3%, C3−C5 selectivity up to 80.9%, and good stability during the hydrogenation of low-density polyethylene. Through comprehensive studies, b-ZSM-5 shows higher molecular diffusion efficiency and acid site concentrations compared with normal ZSM-5 (n-ZSM-5) and hollow ZSM-5 (h-ZSM-5). The introduction of Ce species into b-ZSM-5 further increases the density of Brønsted (B) and Lewis (L) acid sites as active sites, which enhances the adsorption of substrates and facilitates the formation of intermediates and desorption of products. As a result, the hydrocracking activity of Ce/b-ZSM-5 is significantly improved.


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Electronic supplementary material
About this article

High-efficiency Ce-modified ZSM-5 nanosheets for waste plastic upgrading

Show Author's information Xiaomei Wang1,2, Xueting Wu1,2, Meng Zhao1,2, Rui Zhang1,2, Zijian Wang1,2, Yuou Li1,2, Liangliang Zhang1( ), Xiao Wang1,2( ), Shuyan Song1,2( ), Hongjie Zhang1,2,3
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
Department of Chemistry, Tsinghua University, Beijing 100084, China

Abstract

Zeolite-based catalyst hydrocracking of plastics is a potential strategy for mitigating the environmental impacts of plastic wastes and recycling valuable resources, but difficult mass transfer, low concentration of acid sites, and high cost are still barriers to their practical applications. In this paper, we report an excellent hydrocracking catalyst of ZSM-5 nanosheets (Ce/b-ZSM-5) modified by Ce species with high conversion up to 96.3%, C3−C5 selectivity up to 80.9%, and good stability during the hydrogenation of low-density polyethylene. Through comprehensive studies, b-ZSM-5 shows higher molecular diffusion efficiency and acid site concentrations compared with normal ZSM-5 (n-ZSM-5) and hollow ZSM-5 (h-ZSM-5). The introduction of Ce species into b-ZSM-5 further increases the density of Brønsted (B) and Lewis (L) acid sites as active sites, which enhances the adsorption of substrates and facilitates the formation of intermediates and desorption of products. As a result, the hydrocracking activity of Ce/b-ZSM-5 is significantly improved.

Keywords: morphology, rare earth zeolite, plastic degradation, catalytic hydrocracking, acidic site

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Publication history
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Acknowledgements

Publication history

Received: 22 November 2023
Revised: 05 January 2024
Accepted: 07 January 2024
Published: 07 March 2024
Issue date: June 2024

Copyright

© Tsinghua University Press 2024

Acknowledgements

Acknowledgements

This work was supported by the financial aid from the National Science and Technology Major Project of China (No. 2020YFE0204500), the National Natural Science Foundation of China (Nos. 22020102003, 22025506, and 22271274), and Program of Science and Technology Development Plan of Jilin Province of China (Nos. 20230101035JC and 20230101022JC).

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