Using CO2 to mitigate evolution of harmful chemical compounds during thermal degradation of printed circuit boards

Jechan Lee, Taewoo Lee, Yong Sik Ok, Jeong Ik Oh, Eilhann E. Kwon

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In this study, CO2 was used as a reaction medium in the pyrolysis of printed circuit boards (PCBs), thus providing a novel route to mitigate the evolution of harmful chemical species during the thermal degradation of PCBs. For example, this study showed that CO2 acts as an effective carbon scavenger during the pyrolysis of PCBs. CO2 facilitated the thermal cracking of volatile organic compounds (VOCs) that evolved from the thermal degradation of PCBs. As a result, CO2 mitigated the evolution of various harmful pollutants such as phenol and benzene derivatives, PAHs and brominated pollutants, which resulted in the increased generation of syngas (H2 and CO). This study indicates that using CO2 as a reaction medium could lead to the development of a more environmentally benign process for the thermal treatment of PCBs and other harmful and/or refractory wastes.

Original languageEnglish
Pages (from-to)66-72
Number of pages7
JournalJournal of CO2 Utilization
Volume20
DOIs
Publication statusPublished - 2017 Jul 1
Externally publishedYes

Keywords

  • Brominated compounds
  • E-waste
  • Polycyclic aromatic hydrocarbons (PAHs)
  • Pyrolysis
  • Waste disposal

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Process Chemistry and Technology

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