Unpacking bio-based alternatives to ethylene production in Brazil, Europe, and the United States: A comparative life cycle assessment

Marianne Zanon-Zotin*, Clarissa Bergman-Fonte, Taísa Nogueira Morais, Pedro Luiz Barbosa Maia, Lucas Carvalho, Gerd Angelkorte, Ana Carolina Oliveira Fiorini, Pedro Rua Rodriguez Rochedo, Joana Portugal-Pereira, Alexandre Szklo, Roberto Schaeffer

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


Plastics account for 4.5% of global greenhouse gas (GHG) emissions, which are hard-to-abate due to the use of fossil fuels as feedstock. Our study develops a cradle-to-gate life cycle assessment of bioethylene production, exploring 33 pathways across Brazil, the EU, and the US. It aims to understand whether substituting fossil-based ethylene with bioethylene contributes to lowering carbon emissions, and in which of the relevant bioenergy-producing regions/countries the valorisation of biofuels as feedstocks would provide a less carbon-intensive bioethylene production. Results indicate that bioethylene production through catalytic dehydration of sugarcane bioethanol in Brazil presents lowest GHG emission. This pathway could deliver up to −2.1 kg CO2e/kg ethylene when accounting for biogenic carbon storage in long-lived applications such as infrastructure. In contrast, beef tallow performs the poorest as a raw material, regardless of whether land-use change (LUC) emissions are considered. When biogenic carbon storage is factored out, none of the pathways outperforms conventional fossil-based steam cracking; however, some are within the fossil-based range indicating potential indirect benefits through reduced refinery utilisation. Our study underscores that biomaterials production as a climate mitigation strategy must be on par with circular economy measures and the conservation of native forestry ecosystems. These results are particularly relevant to policymakers and industries seeking to align polymer manufacturing with sustainability objectives.
Original languageEnglish
Article number139376
JournalJournal of Cleaner Production
Publication statusPublished - Nov 2023


  • Plastics
  • Ethylene
  • Energy transition
  • Bio-based materials
  • Climate change mitigation
  • Life cycle assessment


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