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Sökning: WFRF:(Carbonell Jose Pastor) > (2003-2004) > On Dioxin Formation...

  • Cieplik, Mariusz K (författare)

On Dioxin Formation in Iron Ore Sintering

  • Artikel/kapitelEngelska2003

Förlag, utgivningsår, omfång ...

  • 2003-06-27
  • American Chemical Society (ACS),2003
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:umu-9224
  • https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-9224URI
  • https://doi.org/10.1021/es026292gDOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • Iron ore sintering is an important source of "dioxins", polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). This paper reports on attempts to identify materials, conditions, and mechanisms responsible for PCDD/F formation (i) by investigating salient properties of ores (viz., with respect to oxidation, condensation, and chlorination of model organics) and (ii) by mimicking the industrial process on a microscale with real-life materials. Principles of Design of Experiments (DOE) are employed. The reactivities of iron ores differ greatly. Limonite/goethite "soft" ore is a very active oxidation catalyst (e.g., for benzene and phenol), a property that may be useful in cleaning up crude sintering process offgases, whereas hematite/magnetite "hard" ore is not. The latter, however strongly promotes condensation of phenol to dibenzofuran. A newly built lab-microscale sintering facility could satisfactorily imitate the large-scale process, in part or as a whole. Results obtained with realistic feed mixtures point at dioxin formation in the sinter bed at levels significant enough to explain a major part of the outputs observed in the real-life process. With ~8 ppm (wt) of chloride added as NaCl, the PCDD/F output doubled, but with the same proportion of chlorine administered as C2Cl4, the dioxin output was over 2 orders of magnitude larger. The use of process reverts, etc. containing chlorinated organics should therefore be avoided. PCDD/F congener patterns are also reported and compared with those observed in practice.

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Carbonell, Jose Pastor (författare)
  • Muñoz, Christina (författare)
  • Baker, Sarah (författare)
  • Krüger, Sophie (författare)
  • Liljelind, PerUmeå universitet,Kemiska institutionen(Swepub:umu)peli0001 (författare)
  • Marklund, StellanUmeå universitet,Kemiska institutionen(Swepub:umu)stma0004 (författare)
  • Louw, Robert (författare)
  • Umeå universitetKemiska institutionen (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Environmental Science & Technology: American Chemical Society (ACS)37:15, s. 3323-310013-936X1520-5851

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