dc.contributor.author | Arnesen, Kamilla | |
dc.contributor.author | Andersen, Vegar | |
dc.contributor.author | Jakovljevic, Katarina | |
dc.contributor.author | Enge, Ellen Katrin | |
dc.contributor.author | Gaertner, Heiko | |
dc.contributor.author | Aarhaug, Thor Anders | |
dc.contributor.author | Einarsrud, Kristian Etienne | |
dc.contributor.author | Tranell, Maria Gabriella | |
dc.date.accessioned | 2024-01-24T12:23:06Z | |
dc.date.available | 2024-01-24T12:23:06Z | |
dc.date.created | 2023-12-19T21:56:46Z | |
dc.date.issued | 2023 | |
dc.identifier.citation | Environmental Science: Advances, 2023. | en_US |
dc.identifier.issn | 2754-7000 | |
dc.identifier.uri | https://hdl.handle.net/11250/3113581 | |
dc.description.abstract | Silicon 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.language.iso | eng | en_US |
dc.publisher | The Royal Society of Chemistry | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Analysis of nitro- and oxy-PAH emissions from a pilot scale silicon process with flue gas recirculation | en_US |
dc.title.alternative | Analysis of nitro- and oxy-PAH emissions from a pilot scale silicon process with flue gas recirculation | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | © 2023 The Author(s). Published by the Royal Society of Chemistry. | en_US |
dc.source.pagenumber | 10 | en_US |
dc.source.journal | Environmental Science: Advances | en_US |
dc.identifier.doi | 10.1039/d3va00187c | |
dc.identifier.cristin | 2215924 | |
dc.relation.project | Norges forskningsråd: 237738 | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |