Functional use of CO₂ to mitigate the formation of bisphenol A in catalytic pyrolysis of polycarbonate

Taewoo LEE, Sungyup JUNG, Kitae BAEK, Yiu Fai TSANG, Kun-Yi Andrew LIN, Young Jae JEON, Eilhann E. KWON

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1 Citation (Scopus)

Abstract

The growing consumption of plastic materials has increased hazardous threats to all environmental media, since current plastic waste management methods release microplastics and toxic chemicals. As such, massive generation of plastic derived pollutants leads to significant public health and environmental problems. In this work, an environmentally sound method for valorization of plastic waste is suggested. In detail, pyrolysis of polycarbonate-containing plastic waste such as automotive headlight housing (AHH) was carried out using CO2 as a co-reactant. AHH was chosen as it discharges bisphenol A (BPA) and aromatic compounds. Under CO2 condition, emissions of BPA and its derivatives were suppressed by 14.5% due to gas phase reactions (GPRs) with CO2. Nevertheless, reaction kinetics for GPRs was not significant. To impart the GPRs, catalytic pyrolysis was done using Ni and Co-based catalysts. During catalytic pyrolysis, syngas production was more than tenfold up comparing to pyrolysis without catalyst. The expedited GPRs over catalysts resulted in the enhanced syngas formation. Total concentration of the toxic chemicals from CO2-assisted catalytic pyrolysis of AHH decreased by 86.1% and 66.7% over Ni and Co catalysts, comparing to those from N2 environment. Copyright © 2021 Elsevier B.V. All rights reserved.

Original languageEnglish
Article number126992
JournalJournal of Hazardous Materials
Volume423
Issue numberPart A
Early online dateAug 2021
DOIs
Publication statusE-pub ahead of print - Aug 2021

Citation

Lee, T., Jung, S., Baek, K., Tsang, Y. F., Lin, K.-Y. A., Jeon, Y. J., & Kwon, E. E. (2022). Functional use of CO₂ to mitigate the formation of bisphenol A in catalytic pyrolysis of polycarbonate. Journal of Hazardous Materials, 423(Part A). Retrieved from https://doi.org/10.1016/j.jhazmat.2021.126992

Keywords

  • Environmental resilience
  • Waste-to-energy
  • Circular economy
  • Bisphenol A
  • Catalytic pyrolysis of polycarbonate
  • Carbon dioxide

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