Gas- and particle-phase products from the photooxidation of acenaphthene and acenaphthylene by OH radicals

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dc.contributor.authorRiva, Matthieu
dc.contributor.authorHealy, Robert M.
dc.contributor.authorFlaud, Pierre-Marie
dc.contributor.authorPerraudin, Emilie
dc.contributor.authorWenger, John C.
dc.contributor.authorVillenave, Eric
dc.contributor.funderEuropean Commissionen
dc.contributor.funderSeventh Framework Programmeen
dc.contributor.funderAgence de l'Environnement et de la Maîtrise de l'Energieen
dc.date.accessioned2017-02-02T12:59:07Z
dc.date.available2017-02-02T12:59:07Z
dc.date.issued2017-11-30
dc.date.updated2017-02-02T12:49:29Z
dc.description.abstractThis work is focused on the gas-phase oxidation of acenaphthylene and acenaphthene by OH radicals and associated secondary organic aerosol (SOA) formation under low and high-NOx conditions. Experiments were carried out in an atmospheric simulation chamber using a proton transfer reaction time-of-flight-mass spectrometer (PTR-TOF-MS) and an aerosol time-of-flight-mass spectrometer (ATOFMS) to chemically characterize the gas- and particle-phase products, respectively. Due to the structures of these two aromatic compounds, the proposed chemical mechanisms exhibit some differences. In the case of acenaphthene, H-atom abstraction from the saturated cyclopenta-fused ring was found to be competitive with the OH-addition to the aromatic rings. During the photooxidation of acenaphthene using nitrous acid (HONO), aromatic ring-opening products such as indanone and indanone carbaldehyde, generated through OH addition to the aromatic ring, were formed in higher yields compared to low-NOx conditions. In the case of acenaphthylene, OH addition to the unsaturated cyclopenta-fused ring was strongly favored. Hence, ring-retaining species such as acenaphthenone and acenaphthenequinone, were identified as the main reaction products in both gas- and particle-phases, especially under high-NOx conditions. Subsequent SOA formation was observed in all experiments and SOA yields were determined under low/high-NOx conditions to be 0.61/0.46 and 0.68/0.55 from the OH-initiated oxidation of acenaphthylene and acenaphthene, respectively.en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationRiva, M., Healy, R. M., Flaud, P.-M., Perraudin, E., Wenger, J. C. and Villenave, E. (2017) 'Gas- and particle-phase products from the photooxidation of acenaphthene and acenaphthylene by OH radicals', Atmospheric Environment, 151, pp. 34-44. doi:10.1016/j.atmosenv.2016.11.063en
dc.identifier.doi10.1016/j.atmosenv.2016.11.063
dc.identifier.endpage44en
dc.identifier.issn1352-2310
dc.identifier.journaltitleAtmospheric Environmenten
dc.identifier.startpage34en
dc.identifier.urihttps://hdl.handle.net/10468/3554
dc.identifier.volume151en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP4::INFRA/228335/EU/Integration of European Simulation Chambers for Investigating Atmospheric Processes - Part 2/EUROCHAMP-2en
dc.rights© 2016 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 licenseen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectPAHsen
dc.subjectGas-phaseen
dc.subjectAtmospheric oxidationen
dc.subjectPhotooxidationen
dc.subjectOH radicalsen
dc.titleGas- and particle-phase products from the photooxidation of acenaphthene and acenaphthylene by OH radicalsen
dc.typeArticle (peer-reviewed)en
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