Cargando…

A reusable, impurity-tolerant and noble metal–free catalyst for hydrocracking of waste polyolefins

One-step conversion of low-purity polyolefins to value-added products without pretreatments represents a great opportunity for chemical recycling of waste plastics. However, additives, contaminants, and heteroatom-linking polymers tend to be incompatible with catalysts that break down polyolefins. H...

Descripción completa

Detalles Bibliográficos
Autores principales: Qiu, Zetian, Lin, Siyu, Chen, Zhuo, Chen, Anqi, Zhou, Yitian, Cao, Xudong, Wang, Yu, Lin, Bo-Lin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10284556/
https://www.ncbi.nlm.nih.gov/pubmed/37343106
http://dx.doi.org/10.1126/sciadv.adg5332
_version_ 1785061429908340736
author Qiu, Zetian
Lin, Siyu
Chen, Zhuo
Chen, Anqi
Zhou, Yitian
Cao, Xudong
Wang, Yu
Lin, Bo-Lin
author_facet Qiu, Zetian
Lin, Siyu
Chen, Zhuo
Chen, Anqi
Zhou, Yitian
Cao, Xudong
Wang, Yu
Lin, Bo-Lin
author_sort Qiu, Zetian
collection PubMed
description One-step conversion of low-purity polyolefins to value-added products without pretreatments represents a great opportunity for chemical recycling of waste plastics. However, additives, contaminants, and heteroatom-linking polymers tend to be incompatible with catalysts that break down polyolefins. Here, we disclose a reusable, noble metal–free and impurity-tolerant bifunctional catalyst, MoS(x)-Hbeta, for hydroconversion of polyolefins into branched liquid alkanes under mild conditions. The catalyst works for a wide scope of polyolefins, including different kinds of high–molecular weight polyolefins, polyolefins mixed with various heteroatom-linking polymers, contaminated polyolefins, and postconsumer polyolefins with/without cleaning under 250°C and 20 to 30 bar H(2) in 6 to 12 hours. A 96% yield of small alkanes was successfully achieved even at a temperature as low as 180°C. These results demonstrate the great potentials of hydroconversion in practical use of waste plastics as a largely untapped carbon feedstock.
format Online
Article
Text
id pubmed-10284556
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher American Association for the Advancement of Science
record_format MEDLINE/PubMed
spelling pubmed-102845562023-06-22 A reusable, impurity-tolerant and noble metal–free catalyst for hydrocracking of waste polyolefins Qiu, Zetian Lin, Siyu Chen, Zhuo Chen, Anqi Zhou, Yitian Cao, Xudong Wang, Yu Lin, Bo-Lin Sci Adv Physical and Materials Sciences One-step conversion of low-purity polyolefins to value-added products without pretreatments represents a great opportunity for chemical recycling of waste plastics. However, additives, contaminants, and heteroatom-linking polymers tend to be incompatible with catalysts that break down polyolefins. Here, we disclose a reusable, noble metal–free and impurity-tolerant bifunctional catalyst, MoS(x)-Hbeta, for hydroconversion of polyolefins into branched liquid alkanes under mild conditions. The catalyst works for a wide scope of polyolefins, including different kinds of high–molecular weight polyolefins, polyolefins mixed with various heteroatom-linking polymers, contaminated polyolefins, and postconsumer polyolefins with/without cleaning under 250°C and 20 to 30 bar H(2) in 6 to 12 hours. A 96% yield of small alkanes was successfully achieved even at a temperature as low as 180°C. These results demonstrate the great potentials of hydroconversion in practical use of waste plastics as a largely untapped carbon feedstock. American Association for the Advancement of Science 2023-06-21 /pmc/articles/PMC10284556/ /pubmed/37343106 http://dx.doi.org/10.1126/sciadv.adg5332 Text en Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Physical and Materials Sciences
Qiu, Zetian
Lin, Siyu
Chen, Zhuo
Chen, Anqi
Zhou, Yitian
Cao, Xudong
Wang, Yu
Lin, Bo-Lin
A reusable, impurity-tolerant and noble metal–free catalyst for hydrocracking of waste polyolefins
title A reusable, impurity-tolerant and noble metal–free catalyst for hydrocracking of waste polyolefins
title_full A reusable, impurity-tolerant and noble metal–free catalyst for hydrocracking of waste polyolefins
title_fullStr A reusable, impurity-tolerant and noble metal–free catalyst for hydrocracking of waste polyolefins
title_full_unstemmed A reusable, impurity-tolerant and noble metal–free catalyst for hydrocracking of waste polyolefins
title_short A reusable, impurity-tolerant and noble metal–free catalyst for hydrocracking of waste polyolefins
title_sort reusable, impurity-tolerant and noble metal–free catalyst for hydrocracking of waste polyolefins
topic Physical and Materials Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10284556/
https://www.ncbi.nlm.nih.gov/pubmed/37343106
http://dx.doi.org/10.1126/sciadv.adg5332
work_keys_str_mv AT qiuzetian areusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins
AT linsiyu areusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins
AT chenzhuo areusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins
AT chenanqi areusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins
AT zhouyitian areusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins
AT caoxudong areusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins
AT wangyu areusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins
AT linbolin areusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins
AT qiuzetian reusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins
AT linsiyu reusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins
AT chenzhuo reusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins
AT chenanqi reusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins
AT zhouyitian reusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins
AT caoxudong reusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins
AT wangyu reusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins
AT linbolin reusableimpuritytolerantandnoblemetalfreecatalystforhydrocrackingofwastepolyolefins