Dyer, AC, Nahil, MA and Williams, PT orcid.org/0000-0003-0401-9326 (2021) Catalytic co-pyrolysis of biomass and waste plastics as a route to upgraded bio-oil. Journal of the Energy Institute, 97. pp. 27-36. ISSN 1743-9671
Abstract
A two-stage reactor system consisting of co-pyrolysis of biomass and plastic in the 1st stage and catalytic upgrading (zeolite ZSM-5 catalyst) of the derived pyrolysis gases in the 2nd stage was used to investigate the yield and composition of the product gases and bio-oil. Biomass waste wood and waste plastics in the form of high density polyethylene, low density polyethylene, polypropylene, polystyrene and polyethylene terephthalate were used as feedstock. The addition of the plastics to the biomass with co-pyrolysis-catalysis, produced a higher CnHm gas yield compared with what would be expected by calculation, suggesting some interaction of the biomass and plastic. The presence of waste plastic resulted in a decrease in the relative proportion of oxygenated compounds in the product oil compared to pyrolysis of biomass alone; for example a reduction of >65% for biomass with polyethylene and polypropylene and >95% reduction for biomass with polystyrene. The fuel properties of the co-pyrolysis upgraded oil were improved compared to biomass alone; for example, the co-pyrolysis of polystyrene and biomass showed an improved relative proportion of compounds in the C5 ― C12 fuel range (76%). In terms of the ratio of biomass to plastic, even low quantities of plastic (9:1 biomass:plastic ratio) produced a lower relative proportion of oxygenated bio-oil compounds, for example biomass:polystyrene at a ratio of 9:1 reduced the relative proportion of oxygenated compounds in the product bio-oil by >55%.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 Energy Institute. Published by Elsevier Ltd. All rights reserved. This is an author produced version of an article published in Journal of the Energy Institute. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Pyrolysis; Biomass; Plastics; Zeolite; Bio-oil |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 11 May 2021 13:32 |
Last Modified: | 30 Mar 2022 00:38 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.joei.2021.03.022 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:173695 |
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