Formation of PCDD/Fs during oxidation of carbonaceous materials at low temperatures

Shunsuke Kuzuhara, Eiki Kasai

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) are unintentionally formed and emitted from various industrial thermal processes. So far, many researchers have examined formation/emission behavior and inhibition of PCDD/Fs. Generally, following three routes were pointed out as major formation pathways of PCDD/Fs: (I) through aromatic precursors such as chlorobenzenes and chlorophenols, (II) decomposition reaction of organic compounds having large molecular sizes such as polycyclic aromatic hydrocarbons (PAHs) and (III) via de novo synthesis from macromolecular carbon. In the incineration and other thermal processes, de novo synthesis is now regarded as an important route for PCDD/Fs formation. This reaction occurs on macro structural carbon under oxidation atmosphere at relatively low temperature. Especially, the properties of a small quantity of residual carbon particles, "soot" which suspended the exhaust gas and metallic chlorides seem to have large effect on formation of PCDD/Fs. The present paper introduces the topics concerning PCDD/Fs formation and carbon oxidation. The mechanism of PCDD/Fs formation, the effect of metallic chlorides and various reactions relating to PCDD/Fs formation are reviewed. Further, the mechanism of carbon oxidation at low temperature and the effect of metallic compounds are discussed.

Original languageEnglish
Pages (from-to)811-818
Number of pages8
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume89
Issue number8
DOIs
Publication statusPublished - 2003 Aug

Keywords

  • Catalysts
  • Dioxins
  • Formation mechanism
  • Metallic chloride
  • Oxidation of carbon
  • PCDD/Fs
  • Soot

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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