Johar, Parul, Rylott, Liz orcid.org/0000-0002-1609-414X, McElroy, Rob orcid.org/0000-0003-2315-8153 et al. (2 more authors) (2022) Biologically bound nickel accelerated de-polymerization of polyethylene to high value hydrocarbons and hydrogen. RSC Sustainability. ISSN 2753-8125
Abstract
The goal of a carbon-neutral society can be realized by utilizing a circular carbon pathway, which combines recycling, biomass utilization, carbon capture and utilization. Inspired by the potential of metal-contaminated biomass and plastic waste as valuable feed-stocks, we have developed a biologically-bound nickel catalyst (Ni-phytocat) to accelerate de-polymerization of polyethylene into high value chemicals. The synergistic effect of microwaves, together with Ni-phytocat as microwave absorbers, accelerate the catalytic de-polymerization process at low temperature (250 °C). The single step process typically takes up to 70 s to transform a sample of low-density polyethylene into liquid hydrocarbons (40–60% oil yield), hydrogen (11–30% gas yield) and filamentous carbon (25–37% solid yield), depending on varying catalyst to polymer weight ratios. The Ni-phytocat enhanced the production of C6–C12 aliphatics (up to 56% selectivity) and favored the aromatization of linear alkanes to form monocyclic aromatics (up to 33% selectivity), thereby releasing more H2 (up to 74% selectivity) as gaseous fractions. The enhancement of (de)hydrogenation, de-carboxylation and cyclization, utilizing Ni-phytocat can be established as a proof of concept to advance and enable selective transformation of polymeric consumer products, paving the way to harness complete circular chemical potential of these future feed-stocks.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Author(s). |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) The University of York > Faculty of Sciences (York) > Biology (York) |
Depositing User: | Pure (York) |
Date Deposited: | 23 Nov 2022 11:20 |
Last Modified: | 16 Oct 2024 18:53 |
Published Version: | https://doi.org/10.1039/D2SU00001F |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1039/D2SU00001F |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:193651 |