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Effects of sulfur o...
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Aurell, JohannaUmeå universitet,Kemiska institutionen
(author)
Effects of sulfur on PCDD/F formation under stable and transient combustion conditions during MSW incineration
- Article/chapterEnglish2009
Publisher, publication year, extent ...
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Elsevier,2009
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:umu-3338
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https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-3338URI
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https://doi.org/10.1016/j.chemosphere.2009.04.065DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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SO2 levels in the flue gas from a laboratory-scale fluidized bed reactor combusting artificial municipal solid waste (MSW) were varied (resulting in four different SO2:HCl ratios 0, 0.2, 0.7 and 2.7 (by mass)) to study the effects of sulfur on the formation of polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and polychlorinated dibenzothiophenes (PCDTs). Sampling was performed simultaneously at three fixed points in the post-combustion zone with temperatures of 400, 300 and 200 °C, under normal combustion conditions and both during and after transient combustion conditions. The findings indicate that sulfur has a greater inhibitory effect on PCDF formation than on PCDD formation and that the PCDD/PCDF ratio in the flue gas depends on both the SO2:HCl ratio in the flue gas and memory effects arising from transient combustion conditions. The results also indicate that the relative importance of different pathways shifts in the post-combustion zone; condensation products increasing with reductions in temperature and increases in residence time. However, these changes appear to depend on the SO2:HCl ratio in the flue gas and combustion conditions. Sulfur seems to inhibit the chlorination of PCDFs. A tendency for increased SO2 levels in the flue gas to increase levels of PCDTs was also detected, but the increases were much less significant than the reductions in PCDF levels.
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Fick, JerkerUmeå universitet,Kemiska institutionen(Swepub:umu)jefi0001
(author)
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Haglund, Peter,1963-Umeå universitet,Kemiska institutionen(Swepub:umu)peha0004
(author)
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Marklund, Stellan,1949-Umeå universitet,Kemiska institutionen(Swepub:umu)stma0004
(author)
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Umeå universitetKemiska institutionen
(creator_code:org_t)
Related titles
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In:Chemosphere: Elsevier76:6, s. 767-7730045-65351879-1298
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