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dc.contributor.authorArnesen, Kamilla
dc.contributor.authorAndersen, Vegar
dc.contributor.authorJakovljevic, Katarina
dc.contributor.authorEnge, Ellen Katrin
dc.contributor.authorGaertner, Heiko
dc.contributor.authorAarhaug, Thor Anders
dc.contributor.authorEinarsrud, Kristian Etienne
dc.contributor.authorTranell, Maria Gabriella
dc.identifier.citationEnvironmental Science: Advances, 2023.en_US
dc.description.abstractSilicon alloys are produced by carbothermic reduction of quartz in a submerged arc furnace. This high-temperature pyrolytic process is a source of polycyclic aromatic hydrocarbons (PAHs), which are a group of aromatic organic molecules with known mutagenic and carcinogenic properties. In this study, the emission of oxy- and nitro-PAHs from a pilot-scale Si furnace, with varying process conditions such as oxygen level, flue gas recirculation (FGR), and off-gas flow, was investigated. Analysis shows the presence of both oxy- and nitro-PAH species in all experiments, believed to be formed from radical-induced substitution reactions initiated by SiO combustion and NOx formation. During Si production without FGR, the levels of oxy- and nitro-PAHs range between 1.1 and 4.4 μg Nm−3, independent of the flue gas flow rate. With increasing FGR (0–82.5%) and decreasing oxygen level (20.7–13.3%), the concentrations of both oxy- and nitro-PAHs increase to 36.6 and 65.9 μg Nm−3, respectively. When the levels of substituted PAHs increase, species such as 4-nitropyrene and 1,2-benzanthraquinone are in abundance compared to their parent PAHs. Experiments at lower flue gas flow (500 Nm3 h−1 versus 1000 Nm3 h−1) generally produce less substituted PAHs, as well as SiO2 particulate matter and NOx, where the latter two parameters have a 99% correlation in this study.en_US
dc.publisherThe Royal Society of Chemistryen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleAnalysis of nitro- and oxy-PAH emissions from a pilot scale silicon process with flue gas recirculationen_US
dc.title.alternativeAnalysis of nitro- and oxy-PAH emissions from a pilot scale silicon process with flue gas recirculationen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© 2023 The Author(s). Published by the Royal Society of Chemistry.en_US
dc.source.journalEnvironmental Science: Advancesen_US
dc.relation.projectNorges forskningsråd: 237738en_US

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal