Fate of metals and emissions of organic pollutants from torrefaction of waste wood, MSW, and RDF

Edo Gimenez, MarUmeå universitet,Kemiska institutionen,Industrial Doctoral School,Department of Chemistry, Umeå University (författare)

Originally included in thesis in manuscript form.
Validerad;2017;Nivå 2;2017-09-25 (andbra)
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.

Skoglund, NilsLuleå tekniska universitet,Umeå universitet,Institutionen för tillämpad fysik och elektronik,Energy Engineering, Department of Engineering Sciences & Mathematics, Luleå University of Technology, Luleå, Sweden,Thermochemical Energy Conversion Laboratory,Energivetenskap(Swepub:ltu)nilsko (författare)
Gao, QiujuUmeå universitet,Kemiska institutionen,Department of Chemistry, Umeå University(Swepub:umu)qiga0001 (författare)
Persson, Per-ErikVafabMiljö Kommunalförbund, SE-721 87 Västerås (författare)
Jansson, StinaUmeå universitet,Kemiska institutionen,Department of Chemistry, Umeå University(Swepub:umu)stakan01 (författare)
Umeå universitetKemiska institutionen (creator_code:org_t)

Av författaren/redakt...: Edo Gimenez, Mar; Skoglund, Nils; Gao, Qiuju; Persson, Per-Eri ...; Jansson, Stina

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