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@ARTICLE{Tsiligiannis:902269,
author = {Tsiligiannis, Epameinondas and Hammes, Julia and Salvador,
Christian Mark and Mentel, Thomas F. and Hallquist, Mattias},
title = {{E}ffect of {NO}x on 1,3,5-trimethylbenzene ({TMB})
oxidation product distribution and particle formation},
journal = {Atmospheric chemistry and physics},
volume = {19},
number = {23},
issn = {1680-7324},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {FZJ-2021-04132},
pages = {15073 - 15086},
year = {2019},
abstract = {Secondary organic aerosol (SOA) represents a significant
fraction of the tropospheric aerosol and its precursors are
volatile organic compounds (VOCs). Anthropogenic VOCs (AVOC)
dominate the VOC budget in many urban areas with
1,3,5-trimethylbenzene (TMB) being among the most reactive
aromatic AVOCs. TMB formed highly oxygenated organic
molecules (HOMs) in an NOx-free environment, which could
contribute to new particle formation (NPF) depending on
oxidation conditions where elevated OH oxidation enhanced
particle formation. The experiments were performed in an
oxidation flow reactor, the Go:PAM unit, under controlled OH
oxidation conditions. By addition of NOx to the system we
investigated the effect of NOx on particle formation and on
the product distribution. We show that the formation of
HOMs, and especially HOM accretion products, strongly varies
with NOx conditions. We observe a suppression of HOM and
particle formation with increasing NOx/ΔTMB ratio and an
increase in the formation of organonitrates (ONs) mostly at
the expense of HOM accretion products. We propose reaction
mechanisms and pathways that explain the formation and
observed product distributions with respect to oxidation
conditions. We hypothesise that, based on our findings from
TMB oxidation studies, aromatic AVOCs may not contribute
significantly to NPF under typical NOx/AVOC conditions found
in urban atmospheres.},
cin = {IEK-8},
ddc = {550},
cid = {I:(DE-Juel1)IEK-8-20101013},
pnm = {2111 - Air Quality (POF4-211)},
pid = {G:(DE-HGF)POF4-2111},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000502996800002},
doi = {10.5194/acp-19-15073-2019},
url = {https://juser.fz-juelich.de/record/902269},
}