Circularizing PET-G Multimaterials: Life Cycle Assessment and Techno-Economic Analysis

Peng Huang, Ashique Ahamed, Ruitao Sun, Guilhem De Hoe, Joe Pitcher, Alan Mushing, Fernando Lourenço, Michael Shaver

Research output: Contribution to journalArticlepeer-review


The recycling of multimaterials such as payment or access cards poses significant challenges. Building on previous experimental work demonstrating the feasibility of chemically recyclable payment cards made from glycol-modified poly(ethylene terephthalate) (PET-G), we use life cycle assessment and techno-economic analysis to investigate two chemical recycling scenarios and evaluate their potential environmental and economic benefits. Recovering all components from the depolymerized products (Scenario 1) achieves substantial environmental benefits across most categories, reducing global warming by up to 67% compared to only recovering major components (Scenario 2). However, the environmental benefits in Scenario 1 incur 69% higher total annualized costs, causing its profitability to be dependent on a minimum selling price of £13.4/kg for cyclohexanedimethanol and less than a 10% discount rate. In contrast, Scenario 2 is less sensitive to discount rate variation and thus a lower risk and more economically feasible option, albeit less environmentally sustainable.

Original languageEnglish
Pages (from-to)15328-15337
Number of pages10
JournalACS Sustainable Chemistry & Engineering
Issue number42
Early online date13 Oct 2023
Publication statusPublished - 23 Oct 2023


  • life-cycle assessment
  • techno-economic analysis
  • chemical recycling
  • multi-materials
  • PET-G
  • life cycle assessment
  • multimaterials


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