Publicação
High atom-economy low-temperature depolymerization of polyethylene terephthalate using choline hydroxide
| Resumo: | This study investigates the low-temperature depolymerization of polyethylene terephthalate (PET) using near-stoichiometric choline hydroxide (ChOH) in methanol, assisted by dichloromethane (DCM) or dimethoxymethane (DMM) as co-solvents. The DCM-assisted system enables rapid apparent PET depolymerization within 30 min under mild conditions, whereas the DMM-assisted system achieves hydrolysis within 20 h at room temperature, yielding choline terephthalate and ethylene glycol. Although slower, the DMM-assisted process proceeds more smoothly, as supported by spectroscopic and microscopic analyses, while the DCM-assisted route leads to accumulation of partially hydrolysed intermediates and transient micro/nanoplastic residues during the early stages of hydrolysis. The studied processes exhibit high atom economy due to the near-stoichiometric use of choline hydroxide and simplified product isolation without acid neutralization or extensive purification steps. In addition, benchmarking based on energy and environmental metrics was extended to account for multistage operations such as solvent removal, drying, and metathesis processes, enabling more comprehensive comparison with previously reported PET depolymerization methods. The results highlight the importance of balanced benchmarking when evaluating sustainability claims in chemical plastic recycling and demonstrate the potential of choline hydroxide-mediated PET hydrolysis as a low-temperature and resource-efficient depolymerization strategy. |
|---|---|
| Autores principais: | Araujo, Hugo Q. |
| Outros Autores: | Martins, Diogo; Goncalves, Joao; Matos, Ines; Ventura, Marcia; Diniz, Mario; Tomazio, Diana; Branco, Luis C.; Lapa, Nuno; Petrovski, Zeljko |
| Assunto: | Analytical Chemistry Chemistry (miscellaneous) Organic Chemistry Electrochemistry |
| Ano: | 2026 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade Nova de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Institucional da UNL |
| _version_ | 1879447505912987648 |
|---|---|
| author | Araujo, Hugo Q. |
| author2 | Martins, Diogo Goncalves, Joao Matos, Ines Ventura, Marcia Diniz, Mario Tomazio, Diana Branco, Luis C. Lapa, Nuno Petrovski, Zeljko |
| author2_role | author author author author author author author author author |
| author_facet | Araujo, Hugo Q. Martins, Diogo Goncalves, Joao Matos, Ines Ventura, Marcia Diniz, Mario Tomazio, Diana Branco, Luis C. Lapa, Nuno Petrovski, Zeljko |
| author_role | author |
| contributor_name_str_mv | LAQV@REQUIMTE UCIBIO - Applied Molecular Biosciences Unit RSC - Royal Society of Chemistry RUN |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Araujo, Hugo Q.\"},{\"Person.name\":\"Martins, Diogo\"},{\"Person.name\":\"Goncalves, Joao\"},{\"Person.name\":\"Matos, Ines\"},{\"Person.name\":\"Ventura, Marcia\"},{\"Person.name\":\"Diniz, Mario\"},{\"Person.name\":\"Tomazio, Diana\"},{\"Person.name\":\"Branco, Luis C.\"},{\"Person.name\":\"Lapa, Nuno\"},{\"Person.name\":\"Petrovski, Zeljko\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | LAQV@REQUIMTE UCIBIO - Applied Molecular Biosciences Unit RSC - Royal Society of Chemistry RUN |
| datacite.creators.creator.creatorName.fl_str_mv | Araujo, Hugo Q. Martins, Diogo Goncalves, Joao Matos, Ines Ventura, Marcia Diniz, Mario Tomazio, Diana Branco, Luis C. Lapa, Nuno Petrovski, Zeljko |
| datacite.date.Accepted.fl_str_mv | 2026-09-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2026-09-07T14:07:01Z |
| datacite.date.embargoed.fl_str_mv | 2026-09-07T14:07:01Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Analytical Chemistry Chemistry (miscellaneous) Organic Chemistry Electrochemistry |
| datacite.titles.title.fl_str_mv | High atom-economy low-temperature depolymerization of polyethylene terephthalate using choline hydroxide |
| dc.contributor.none.fl_str_mv | LAQV@REQUIMTE UCIBIO - Applied Molecular Biosciences Unit RSC - Royal Society of Chemistry RUN |
| dc.creator.none.fl_str_mv | Araujo, Hugo Q. Martins, Diogo Goncalves, Joao Matos, Ines Ventura, Marcia Diniz, Mario Tomazio, Diana Branco, Luis C. Lapa, Nuno Petrovski, Zeljko |
| dc.date.Accepted.fl_str_mv | 2026-09-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2026-09-07T14:07:01Z |
| dc.date.embargoed.fl_str_mv | 2026-09-07T14:07:01Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10362/206132 |
| dc.language.none.fl_str_mv | eng |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Analytical Chemistry Chemistry (miscellaneous) Organic Chemistry Electrochemistry |
| dc.title.fl_str_mv | High atom-economy low-temperature depolymerization of polyethylene terephthalate using choline hydroxide |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | This study investigates the low-temperature depolymerization of polyethylene terephthalate (PET) using near-stoichiometric choline hydroxide (ChOH) in methanol, assisted by dichloromethane (DCM) or dimethoxymethane (DMM) as co-solvents. The DCM-assisted system enables rapid apparent PET depolymerization within 30 min under mild conditions, whereas the DMM-assisted system achieves hydrolysis within 20 h at room temperature, yielding choline terephthalate and ethylene glycol. Although slower, the DMM-assisted process proceeds more smoothly, as supported by spectroscopic and microscopic analyses, while the DCM-assisted route leads to accumulation of partially hydrolysed intermediates and transient micro/nanoplastic residues during the early stages of hydrolysis. The studied processes exhibit high atom economy due to the near-stoichiometric use of choline hydroxide and simplified product isolation without acid neutralization or extensive purification steps. In addition, benchmarking based on energy and environmental metrics was extended to account for multistage operations such as solvent removal, drying, and metathesis processes, enabling more comprehensive comparison with previously reported PET depolymerization methods. The results highlight the importance of balanced benchmarking when evaluating sustainability claims in chemical plastic recycling and demonstrate the potential of choline hydroxide-mediated PET hydrolysis as a low-temperature and resource-efficient depolymerization strategy. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | article |
| fulltext.url.fl_str_mv | https://run.unl.pt/bitstreams/78a5f228-b406-47cb-b19f-1cfed3a212ae/download |
| id | run_af91b8d65f71a6bbbb59a90a093f981f |
| identifier.url.fl_str_mv | http://hdl.handle.net/10362/206132 |
| inst_facet_str | urn:organizationAcronym:unl{{{_:::_}}}Universidade Nova de Lisboa |
| instacron_str | unl |
| institution | Universidade Nova de Lisboa |
| instname_str | Universidade Nova de Lisboa |
| language | eng |
| network_acronym_str | run |
| network_name_str | Repositório Institucional da UNL |
| oai_identifier_str | oai:run.unl.pt:10362/206132 |
| organization_str_mv | urn:organizationAcronym:unl |
| person_str_mv | Araujo, Hugo Q. Martins, Diogo Goncalves, Joao Matos, Ines Ventura, Marcia Diniz, Mario Tomazio, Diana Branco, Luis C. Lapa, Nuno Petrovski, Zeljko |
| publishDate | 2026 |
| repo_facet_str | urn:repositoryAcronym:run{{{_:::_}}}Repositório Institucional da UNL |
| reponame_str | Repositório Institucional da UNL |
| repository_id_str | urn:repositoryAcronym:run |
| service_str_mv | urn:repositoryAcronym:run |
| spelling | engenThis study investigates the low-temperature depolymerization of polyethylene terephthalate (PET) using near-stoichiometric choline hydroxide (ChOH) in methanol, assisted by dichloromethane (DCM) or dimethoxymethane (DMM) as co-solvents. The DCM-assisted system enables rapid apparent PET depolymerization within 30 min under mild conditions, whereas the DMM-assisted system achieves hydrolysis within 20 h at room temperature, yielding choline terephthalate and ethylene glycol. Although slower, the DMM-assisted process proceeds more smoothly, as supported by spectroscopic and microscopic analyses, while the DCM-assisted route leads to accumulation of partially hydrolysed intermediates and transient micro/nanoplastic residues during the early stages of hydrolysis. The studied processes exhibit high atom economy due to the near-stoichiometric use of choline hydroxide and simplified product isolation without acid neutralization or extensive purification steps. In addition, benchmarking based on energy and environmental metrics was extended to account for multistage operations such as solvent removal, drying, and metathesis processes, enabling more comprehensive comparison with previously reported PET depolymerization methods. The results highlight the importance of balanced benchmarking when evaluating sustainability claims in chemical plastic recycling and demonstrate the potential of choline hydroxide-mediated PET hydrolysis as a low-temperature and resource-efficient depolymerization strategy.application/pdfenHigh atom-economy low-temperature depolymerization of polyethylene terephthalate using choline hydroxideAraujo, Hugo Q.Martins, DiogoGoncalves, JoaoMatos, InesVentura, MarciaDiniz, MarioTomazio, DianaBranco, Luis C.Lapa, NunoPetrovski, ZeljkoLAQV@REQUIMTEUCIBIO - Applied Molecular Biosciences UnitRSC - Royal Society of ChemistryHostingInstitutionOrganizationalRUNe-mailmailto:run@unl.ptrun@unl.ptISSNIsPartOf2753-8125URNIsPartOfPURE: 171486430URNIsPartOfPURE UUID: 6495b0a3-aef5-4a98-884d-995ac5de5f19URNIsPartOfWOS: 001824690000001URNIsPartOfScopus: 105045422179URNIsPartOfORCID: /0000-0002-8104-7008/work/226046369URNIsPartOfORCID: /0000-0001-7862-7477/work/226047114DOIIsPartOf10.1039/d6su00314a2026-09-07T14:07:01Z2026-09-012026-09-01T00:00:00ZHandlehttp://hdl.handle.net/10362/206132http://purl.org/coar/access_right/c_abf2open accessAnalytical ChemistryChemistry (miscellaneous)Organic ChemistryElectrochemistry1115794 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal articlehttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://run.unl.pt/bitstreams/78a5f228-b406-47cb-b19f-1cfed3a212ae/download |
| spellingShingle | High atom-economy low-temperature depolymerization of polyethylene terephthalate using choline hydroxide Araujo, Hugo Q. Analytical Chemistry Chemistry (miscellaneous) Organic Chemistry Electrochemistry |
| status | SINGLETON |
| subject.fl_str_mv | Analytical Chemistry Chemistry (miscellaneous) Organic Chemistry Electrochemistry |
| title | High atom-economy low-temperature depolymerization of polyethylene terephthalate using choline hydroxide |
| title_full | High atom-economy low-temperature depolymerization of polyethylene terephthalate using choline hydroxide |
| title_fullStr | High atom-economy low-temperature depolymerization of polyethylene terephthalate using choline hydroxide |
| title_full_unstemmed | High atom-economy low-temperature depolymerization of polyethylene terephthalate using choline hydroxide |
| title_short | High atom-economy low-temperature depolymerization of polyethylene terephthalate using choline hydroxide |
| title_sort | High atom-economy low-temperature depolymerization of polyethylene terephthalate using choline hydroxide |
| topic | Analytical Chemistry Chemistry (miscellaneous) Organic Chemistry Electrochemistry |
| topic_facet | Analytical Chemistry Chemistry (miscellaneous) Organic Chemistry Electrochemistry |
| url | http://hdl.handle.net/10362/206132 |
| visible | 1 |
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