Inhibition of PCDD/F and PCB formation in co-combustion

M. Pandelova, D. Lenoir, K. W. Schramm

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Co-combustion of coal-solid waste mixtures in pilot and laboratory-scale combustors with emphasis on monitoring of toxic chlorinated hydrocarbon emissions such as polychlorinated dibenzo-p-dioxins and -furans (PCDD/F) and polychlorinated biphenyls (PCB) is elaborated. The objective of the work is to investigate the so-called primary measures technique. Twenty different thermally resistant inorganic compounds were added directly to the fuel as inhibitors of PCDD/F formation. The fuel-types used in this study included lignite coal, pre-treated municipal solid waste and polyvinyl chloride (PVC). Principle component analysis (PCA) provides the basis for a feasible discussion about the efficiency of 20 inhibitors on PCDD/F and PCB formation. The study showed that the metal oxides group investigated had no inhibitory effect. Although the single N- and S-containing compounds, used as additives for the type of lignite coal, solid waste and PVC fuel, are not very effective as inhibitors, all other N- and S-containing substances are capable to strongly reduce PCDD/F and PCB flue gas emission. The most effective inhibitors are (NH4)2SO4 and (NH4)2S2O3. (NH4)2SO4 present at 3% of the fuel can reduce the PCDD/F emissions to 90%. Its low cost and high efficiency favour them as useful for full-scale combustion units.

Original languageEnglish
Pages (from-to)615-618
Number of pages4
JournalJournal of Hazardous Materials
Volume149
Issue number3
DOIs
StatePublished - 19 Nov 2007

Keywords

  • Inhibition
  • PCA
  • PCB
  • PCDD/F

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