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Nanostructured micro particles as a low-cost and sustainable catalyst in the recycling of PET fiber waste by the glycolysis method
RISE Research Institutes of Sweden, Materials and Production, Chemistry, Biomaterials and Textiles.ORCID iD: 0000-0002-9821-9769
RISE Research Institutes of Sweden, Materials and Production, Product Realisation Methodology.ORCID iD: 0000-0003-4860-8763
Chalmers University of Technology, Sweden.
2021 (English)In: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 126, p. 559-566Article in journal (Refereed) Published
Abstract [en]

Magnetic Mg-Al-O@Fe3O4 micro particles were synthesized by coating nanosized Mg-Al double oxides onto Fe3O4 micro particles. The formed hierarchical structure gave Mg-Al-O@Fe3O4 micro particles a high active surface area, which enabled these micro particles to work efficiently as a catalyst in the glycolysis of poly(ethylene terephthalate) (PET). The bis(hydroxyethyl) terephthalate (BHET) yield reached above 80 mol% in the presence of 0.5 wt% of Mg-Al-O@Fe3O4 micro catalyst in the reaction system within 90 min at 240 °C. After the reaction, Mg-Al-O@Fe3O4 micro catalyst was easily retrieved by a magnetic decantation and can be repetitively used for two times with a high catalytic efficiency. After that, the deactivated Mg-Al-O@Fe3O4 micro catalyst can be regenerated by heat treatment. The regenerated Mg-Al-O@Fe3O4 micro catalyst displays a comparable catalytic performance as that of the virgin catalyst. In addition, the Mg-Al double oxides and Fe3O4 micro particles are low-cost and environmentally benign. Therefore, the Mg-Al-O@Fe3O4 micro catalyst may contribute to an economically and environmentally improved large-scale circular recycling of PET fiber waste. © 2021 The Author(s)

Place, publisher, year, edition, pages
Elsevier Ltd , 2021. Vol. 126, p. 559-566
Keywords [en]
Glycolysis, Nanostructured magnetic micro particles, PET fiber recycling, Poly(ethylene terephthalate) (PET), Sustainable catalyst, Alumina, Aluminum coatings, Aluminum oxide, Binary alloys, Costs, Ethylene, Magnesium alloys, Magnesium compounds, Magnetism, Magnetite, Pathology, Recycling, Fe$-3$/O$-4$, Low-costs, Microparticles, Nano-structured, Nanostructured magnetic micro particle, Recycling of PET fiber wastes, ]+ catalyst, Polyethylene terephthalates
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:ri:diva-52962DOI: 10.1016/j.wasman.2021.03.049Scopus ID: 2-s2.0-85103977757OAI: oai:DiVA.org:ri-52962DiVA, id: diva2:1546924
Note

Funding details: Stiftelsen för Miljöstrategisk Forskning, 2016/1489; Funding details: Horizon 2020, 646226; Funding text 1: The authors would like to thank Dr. Hanna de la Motte for her careful reading of the manuscript and insightful suggestions. This work is supported by European Union's Horizon 2020 research and innovation program under the grant agreement No. 646226 and Swedish Foundation for Strategic Environmental Research (grant No. 2016/1489).

Available from: 2021-04-23 Created: 2021-04-23 Last updated: 2023-06-08Bibliographically approved

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Guo, ZengweiAdolfsson, Erik

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