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- Title
Quantifying primary oxidation products in the OH-initiated reaction of benzyl alcohol.
- Authors
Buenconsejo, Reina S.; Charan, Sophia M.; Seinfeld, John H.; Wennberg, Paul O.
- Abstract
Benzyl alcohol is a compound found in many volatile chemical products (VCPs), and is widely used in personal care products and as an industrial solvent. While past work has empirically identified oxidation products, we do not understand explicit branching ratios for first-generation benzyl alcohol oxidation products, particularly over a range of [NO] conditions. Using gas chromatography (GC) in tandem with chemical ionization mass spectrometry (CIMS), we measure the branching ratios of major oxidation products, namely hydroxybenzyl alcohol (HBA) and benzaldehyde. Later-generation oxidation products from both HBA and benzaldehyde pathways are also observed. We find the H-abstraction route leading to benzaldehyde formation unaffected by [NO], with a branching ratio of ~ 19%. The OH addition route, however, which leads to HBA formation, does vary with [NO]. At higher [NO], we report a branching ratio for HBA of ~ 45-47% and as high as ~ 69% at low [NO]. We also find that HBA has a high secondary organic aerosol (SOA) yield and, therefore, likely contributes to the high SOA yield of benzyl alcohol which under some conditions can approach unity. Insights from the present study can help elucidate the chemistry of other atmospherically-relevant aromatic compounds, especially those found in VCPs.
- Subjects
BENZYL alcohol; CHEMICAL ionization mass spectrometry; ALCOHOL oxidation; BRANCHING ratios; OXIDATION; AROMATIC compounds
- Publication
Atmospheric Chemistry & Physics Discussions, 2023, p1
- ISSN
1680-7367
- Publication type
Article
- DOI
10.5194/egusphere-2023-2483