Control of the fate of toxic pollutants from catalytic pyrolysis of polyurethane by oxidation using CO₂

Jong-Min JUNG, Taewoo LEE, Sungyup JUNG, Yiu Fai TSANG, Amit BHATNAGAR, Sang Soo LEE, Hocheol SONG, Won-Kun PARK, Eilhann E. KWON

Research output: Contribution to journalArticlespeer-review

10 Citations (Scopus)

Abstract

In automotive industry, plastic consumption has substantially increased due to its affordability, durability, and lightness. However, the massive generation of plastic wastes from the automotive industry becomes a growing environmental concern. Current disposal methods of end-of-life vehicles (ELVs) are incineration and landfilling, but these methods generate toxic chemicals and leachate into the environment. To propose more sustainable disposal platform for ELVs, this study used a pyrolysis process using CO₂ as a reaction medium. As a case study, automotive seat form (ASF) in ELVs was disposed and valorized through the CO₂-assisted pyrolysis. ASF, composed of polyurethane, generated harmful aromatic compounds during pyrolysis process such as benzene, aniline and their derivatives. To convert harmful chemicals into value-added syngas (H₂ and CO), catalytic pyrolysis of ASF was performed using a nickel catalyst. Effects of both CO₂ and nickel catalyst showed 89.9 wt.% reduction of toxic chemical production by converting them into syngas, as comparing to pyrolysis without Ni catalyst. Gas-phase-reaction between CO₂ and pyrogenic products from ASF resulted in more than 200 times of CO production. Also, CO₂ suppressed catalyst deactivation. Therefore, this study suggested that CO₂ and plastic waste from ELVs can be converted to value-added products through CO₂-assisted catalytic pyrolysis. Copyright © 2022 Elsevier B.V.
Original languageEnglish
Article number136358
JournalChemical Engineering Journal
Volume442
Issue numberPt. 1
Early online date12 Apr 2022
DOIs
Publication statusPublished - 15 Aug 2022

Citation

Jung, J.-M., Lee, T., Jung, S., Tsang, Y. F., Bhatnagar, A., Lee, S. S., . . . Kwon, E. E. (2022). Control of the fate of toxic pollutants from catalytic pyrolysis of polyurethane by oxidation using CO₂. Chemical Engineering Journal, 442(Pt.1). Retrieved from https://doi.org/10.1016/j.cej.2022.136358

Keywords

  • Circular economy
  • End-of-life vehicles (ELVs)
  • Catalytic pyrolysis
  • Polyurethane
  • Carbon dioxide
  • Pollutant control

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