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Fate of metals and emissions of organic pollutants from torrefaction of waste wood, MSW, and RDF
Department of Chemistry, Umeå University.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-5777-9241
Department of Chemistry, Umeå University.
VafabMiljö Kommunalförbund, SE-721 87 Västerås.
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2017 (English)In: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 68, 646-652 p.Article in journal (Refereed) Published
Abstract [en]

Torrefaction of municipal solid waste (MSW), refuse-derived fuel (RDF), and demolition and construction wood (DC) was performed at 220 °C and a residence time of 90 min in a bench-scale reactor. The levels of toxic polychlorinated dibenzo-p-dioxins (PCDD) and dibenzofurans (PCDF) contained in emission from the torrefaction process were evaluated. In addition, main ash-forming elements and trace metals in the raw feedstock and char were determined. The use of MSW in fuel blends with DC resulted in lower PCDD and PCDF emissions after torrefaction, compared with the RDF blends. The migration of chlorine from the feedstock to the gas phase reduces the chlorine content of the char which may reduce the risk of alkali chloride-corrosion in char combustion. However, trace metals catalytically active in the formation of PCDD and PCDF remain in the char, thereby may promote PCDD and PCDF formation during subsequent char combustion for energy recovery; this formation is less extensive than when the feedstock is used.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 68, 646-652 p.
National Category
Energy Engineering
Research subject
Energy Engineering
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URN: urn:nbn:se:ltu:diva-64276DOI: 10.1016/j.wasman.2017.06.017ISI: 000413126300065PubMedID: 28633911OAI: oai:DiVA.org:ltu-64276DiVA: diva2:1112680
Note

Validerad;2017;Nivå 2;2017-09-25 (andbra)

Available from: 2017-06-20 Created: 2017-06-20 Last updated: 2017-11-24Bibliographically approved

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Skoglund, Nils

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