Simplified, fast, and efficient microwave assisted chemical recycling of poly (ethylene terephthalate) waste

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dc.contributor.authorZangana, Karzan H.
dc.contributor.authorFernandez, Antonio
dc.contributor.authorHolmes, Justin D.
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2022-11-22T16:46:24Z
dc.date.available2022-11-22T16:46:24Z
dc.date.issued2022-10-25
dc.date.updated2022-11-22T16:41:16Z
dc.description.abstractThe widespread adoption of chemical recycling of poly (ethylene terephthalate) (PET) is hampered by long reaction times, high energy consumption and the use of metal catalysts that are either toxic or cost prohibitive for industrial use. Herein, we report a simple PET glycolytic process that combines an environmentally friendly and cheap heterogenous catalyst, calcium oxide (CaO) with microwave irradiation to obtain the monomer bis(2-hydroxyethyl) terephthalate (BHET), which can be easily separated by crystallisation. After the process optimisation, depolymerisation of PET waste was achieved in 3.5 min under atmospheric pressure, to obtain highly crystalline BHET with a yield of 75%. To our knowledge, this is the fastest heterogeneous glycolytic process reported in the literature to-date, using a cheap and eco- friendly catalyst. Moreover, by using a heterogenous catalyst and avoiding the need for product precipitation by water addition, CaO and ethylene glycol materials were separated and reused, thus validating this protocol as a potential green and scalable route for PET recycling.en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid104588en
dc.identifier.citationZangana, K.H., Fernandez, A. and Holmes, J.D. (2022) ‘Simplified, fast, and efficient microwave assisted chemical recycling of poly (Ethylene terephthalate) waste’, Materials Today Communications, 33, 104588 (7 pp). doi: 10.1016/j.mtcomm.2022.10458en
dc.identifier.doi10.1016/j.mtcomm.2022.104588en
dc.identifier.endpage7en
dc.identifier.issn2352-4928
dc.identifier.journaltitleMaterials Today Communicationsen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/13872
dc.identifier.volume33en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Research Centres/12/RC/2278/IE/Advanced Materials and BioEngineering Research Centre (AMBER)/en
dc.relation.urihttps://doi.org/10.1016/j.mtcomm.2022.104588
dc.rightsCrown Copyright © 2022 Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectPET wasteen
dc.subjectMicrowave-assisted depolymerisationen
dc.subjectGlycolysisen
dc.subjectTransesterificationen
dc.subjectHeterogeneous catalysisen
dc.subjectCalcium oxideen
dc.titleSimplified, fast, and efficient microwave assisted chemical recycling of poly (ethylene terephthalate) wasteen
dc.typeArticle (peer-reviewed)en
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