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Analysis of the kinetics, energy balance and carbon footprint of the delamination of multilayer flexible packaging films via carboxylic acids

Sibel Ügdüler (UGent) , Tobias De Somer (UGent) , Kevin Van Geem (UGent) , Juray De Wilde, Martijn Roosen, Bram Deprez and Steven De Meester (UGent)
(2022) RESOURCES CONSERVATION AND RECYCLING. 181.
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Abstract
Flexible plastic packaging is still one of the most difficult streams to recycle due to the presence of multilayers. With multilayers being very functional during their use phase, the delamination of multilayer structures is promising because it enables the recovery of the constituent polymer layers without any degradation and/or dissolution, thus creating economic and environmental benefits. However, there is hardly any data available on the optimization of the delamination process for multilayer flexible plastic films (MFPFs), as well as the potential scale-up in terms of economic and environmental factors. Therefore, this study investigates the effect of experimental parameters such as temperature, solid/liquid (S/L) ratio, particle size, and stirring rate on the delamination rate of various MFPFs. Among these parameters, the combination of temperature and S/L ratio has the most pronounced effect on increasing the delamination rate. On the other hand, particle size does not have a significant influence on the delamination rate. Under optimal delamination conditions, more than 90% delam-ination is achieved in 60 min, particularly for PET-based MFPF. Simulations of the delamination process in Aspen Plus (R) reveal that the composition of MFPF has a significant effect on the energy consumption during the delamination process. The slower delamination kinetics of MFPFs can be compensated for through process optimization, but this typically results in higher energy requirements. The life cycle assessment (LCA) confirms that high energy consumption results in high CO2 emissions; thus, design for MFPFs, together with process optimization, are key aspects of obtaining a competitive delamination process with economic and environmental benefits.
Keywords
Delamination, Multilayer, Recycling, Circular economy, Optimization, Life cycle assessment, POLYMER-SOLUTIONS, VAPOR-PRESSURES, WASTE

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Citation

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MLA
Ügdüler, Sibel, et al. “Analysis of the Kinetics, Energy Balance and Carbon Footprint of the Delamination of Multilayer Flexible Packaging Films via Carboxylic Acids.” RESOURCES CONSERVATION AND RECYCLING, vol. 181, 2022, doi:10.1016/j.resconrec.2022.106256.
APA
Ügdüler, S., De Somer, T., Van Geem, K., De Wilde, J., Roosen, M., Deprez, B., & De Meester, S. (2022). Analysis of the kinetics, energy balance and carbon footprint of the delamination of multilayer flexible packaging films via carboxylic acids. RESOURCES CONSERVATION AND RECYCLING, 181. https://doi.org/10.1016/j.resconrec.2022.106256
Chicago author-date
Ügdüler, Sibel, Tobias De Somer, Kevin Van Geem, Juray De Wilde, Martijn Roosen, Bram Deprez, and Steven De Meester. 2022. “Analysis of the Kinetics, Energy Balance and Carbon Footprint of the Delamination of Multilayer Flexible Packaging Films via Carboxylic Acids.” RESOURCES CONSERVATION AND RECYCLING 181. https://doi.org/10.1016/j.resconrec.2022.106256.
Chicago author-date (all authors)
Ügdüler, Sibel, Tobias De Somer, Kevin Van Geem, Juray De Wilde, Martijn Roosen, Bram Deprez, and Steven De Meester. 2022. “Analysis of the Kinetics, Energy Balance and Carbon Footprint of the Delamination of Multilayer Flexible Packaging Films via Carboxylic Acids.” RESOURCES CONSERVATION AND RECYCLING 181. doi:10.1016/j.resconrec.2022.106256.
Vancouver
1.
Ügdüler S, De Somer T, Van Geem K, De Wilde J, Roosen M, Deprez B, et al. Analysis of the kinetics, energy balance and carbon footprint of the delamination of multilayer flexible packaging films via carboxylic acids. RESOURCES CONSERVATION AND RECYCLING. 2022;181.
IEEE
[1]
S. Ügdüler et al., “Analysis of the kinetics, energy balance and carbon footprint of the delamination of multilayer flexible packaging films via carboxylic acids,” RESOURCES CONSERVATION AND RECYCLING, vol. 181, 2022.
@article{8749001,
  abstract     = {{Flexible plastic packaging is still one of the most difficult streams to recycle due to the presence of multilayers. With multilayers being very functional during their use phase, the delamination of multilayer structures is promising because it enables the recovery of the constituent polymer layers without any degradation and/or dissolution, thus creating economic and environmental benefits. However, there is hardly any data available on the optimization of the delamination process for multilayer flexible plastic films (MFPFs), as well as the potential scale-up in terms of economic and environmental factors. Therefore, this study investigates the effect of experimental parameters such as temperature, solid/liquid (S/L) ratio, particle size, and stirring rate on the delamination rate of various MFPFs. Among these parameters, the combination of temperature and S/L ratio has the most pronounced effect on increasing the delamination rate. On the other hand, particle size does not have a significant influence on the delamination rate. Under optimal delamination conditions, more than 90% delam-ination is achieved in 60 min, particularly for PET-based MFPF. Simulations of the delamination process in Aspen Plus (R) reveal that the composition of MFPF has a significant effect on the energy consumption during the delamination process. The slower delamination kinetics of MFPFs can be compensated for through process optimization, but this typically results in higher energy requirements. The life cycle assessment (LCA) confirms that high energy consumption results in high CO2 emissions; thus, design for MFPFs, together with process optimization, are key aspects of obtaining a competitive delamination process with economic and environmental benefits.}},
  articleno    = {{106256}},
  author       = {{Ügdüler, Sibel and De Somer, Tobias and Van Geem, Kevin and De Wilde, Juray and Roosen, Martijn and Deprez, Bram and De Meester, Steven}},
  issn         = {{0921-3449}},
  journal      = {{RESOURCES CONSERVATION AND RECYCLING}},
  keywords     = {{Delamination,Multilayer,Recycling,Circular economy,Optimization,Life cycle assessment,POLYMER-SOLUTIONS,VAPOR-PRESSURES,WASTE}},
  language     = {{eng}},
  pages        = {{16}},
  title        = {{Analysis of the kinetics, energy balance and carbon footprint of the delamination of multilayer flexible packaging films via carboxylic acids}},
  url          = {{http://doi.org/10.1016/j.resconrec.2022.106256}},
  volume       = {{181}},
  year         = {{2022}},
}
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