Assessing Potential Oligomerization Reaction Mechanisms of Isoprene Epoxydiols on Secondary Organic Aerosol

2018 ◽  
Vol 53 (1) ◽  
pp. 176-184 ◽  
Author(s):  
Santino J. Stropoli ◽  
Corina R. Miner ◽  
Daniel R. Hill ◽  
Matthew J. Elrod
Keyword(s):  
Reaction Mechanisms ◽  
Secondary Organic Aerosol ◽  
Organic Aerosol ◽  
Oligomerization Reaction

Chemical Composition and Reaction Mechanisms for Secondary Organic Aerosol from Photooxidation of Ethylbenzene

2006 ◽  
Vol 22 (05) ◽  
pp. 596-601
Author(s):  
HUANG Ming-Qiang ◽  
◽  
◽  
HAO Li-Qing ◽  
ZHOU Liu-Zhou ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Reaction Mechanisms ◽  
Secondary Organic Aerosol ◽  
Organic Aerosol

Chemical Composition and Reaction Mechanisms for Secondary Organic Aerosol from Photooxidation of Toluene

2006 ◽  
Vol 53 (5) ◽  
pp. 1149-1156 ◽  
Author(s):  
Ming-Qiang Huang ◽  
Wei-Jun Zhang ◽  
Li-Qing Hao ◽  
Zhen-Ya Wang ◽  
Liu-Zhu Zhou ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Reaction Mechanisms ◽  
Secondary Organic Aerosol ◽  
Organic Aerosol

scholarly journals Different roles of water in secondary organic aerosol formation from toluene and isoprene

2017 ◽  
Author(s):  
Long Jia ◽  
Yongfu Xu
Keyword(s):  
Gas Phase ◽  
Secondary Organic Aerosol ◽  
Organic Aerosol ◽  
Chemical Components ◽  
Smog Chamber ◽  
Aerosol Formation ◽  
Model Simulations ◽  
Dry Conditions ◽  
Major Chemical ◽  
Oligomerization Reaction

Abstract. Roles of water in the formation of secondary organic aerosol (SOA) from the irradiations of toluene-NO2 and isoprene-NO2 were investigated in a smog chamber. Experimental results show that the yield of SOA from toluene almost doubled as relative humidity increased from 5 % to 85 %, whereas the yield of SOA from isoprene under humid conditions decreased by 2.6 times as compared to that under dry conditions. The distinct difference of RH effects on SOA formation from toluene and isoprene is well explained with our experiments and model simulations. The increased SOA from humid toluene-NO2 irradiations is mainly contributed by O–H-containing products such as polyalcohols formed from aqueous reactions. The major chemical components of SOA in isoprene-NO2 irradiations are oligomers formed from the gas phase. SOA formation from isoprene-NO2 irradiations is controlled by stable Criegee intermediate (SCI) that is greatly influenced by water. As a result, high RH can obstruct the oligomerization reaction of SCI to form SOA.

Chemical Composition and Reaction Mechanisms for Aged p -Xylene Secondary Organic Aerosol in the Presence of Ammonia

2018 ◽  
Vol 65 (5) ◽  
pp. 578-590 ◽  
Author(s):  
Jun Xu ◽  
Ming-Qiang Huang ◽  
Shun-You Cai ◽  
Ying-Min Liao ◽  
Chang-Jin Hu ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Reaction Mechanisms ◽  
Secondary Organic Aerosol ◽  
Organic Aerosol

scholarly journals Secondary organic aerosol formation from biomass burning emissions

2019 ◽  
Author(s):  
Christopher Y. Lim ◽  
David H. Hagan ◽  
Matthew M. Coggon ◽  
Abigail R. Koss ◽  
Kanako Sekimoto ◽  
...  
Keyword(s):  
Biomass Burning ◽  
Secondary Organic Aerosol ◽  
Total Concentration ◽  
Organic Aerosol ◽  
Oh Radicals ◽  
Aerosol Formation ◽  
Atmospheric Aging ◽  
Aerosol Mass ◽  
Photochemical Aging ◽  
Organic Gases

Abstract. Biomass burning is an important source of aerosol and trace gases to the atmosphere, but how these emissions change chemically during their lifetimes is not fully understood. As part of the Fire Influence on Regional and Global Environments Experiment (FIREX 2016), we investigated the effect of photochemical aging on biomass burning organic aerosol (BBOA), with a focus on fuels from the western United States. Emissions were sampled into a small (150 L) environmental chamber and photochemically aged via the addition of ozone and irradiation by 254 nm light. While some fraction of species undergoes photolysis, the vast majority of aging occurs via reaction with OH radicals, with total OH exposures corresponding to the equivalent of up to 10 days of atmospheric oxidation. For all fuels burned, large and rapid changes are seen in the ensemble chemical composition of BBOA, as measured by an aerosol mass spectrometer (AMS). Secondary organic aerosol (SOA) formation is seen for all aging experiments and continues to grow with increasing OH exposure, but the magnitude of the SOA formation is highly variable between experiments. This variability can be explained well by a combination of experiment-to-experiment differences in OH exposure and the total concentration of non-methane organic gases (NMOGs) in the chamber before oxidation, measured by PTR-ToF-MS (r2 values from 0.64 to 0.83). From this relationship, we calculate the fraction of carbon from biomass burning NMOGs that is converted to SOA as a function of equivalent atmospheric aging time, with carbon yields ranging from 24 ± 4 % after 6 hours to 56 ± 9 % after 4 days.

scholarly journals Aging of atmospheric aerosols and the role of iron in catalyzing brown carbon formation

2021 ◽  
Author(s):  
Hind A. A. Al-Abadleh
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Atmospheric Aerosols ◽  
Secondary Organic Aerosol ◽  
Organic Aerosol ◽  
Atmospheric Oxidation ◽  
Carbon Formation ◽  
Brown Carbon ◽  
Volatile Organic

Extensive research has been done on the processes that lead to the formation of secondary organic aerosol (SOA) including atmospheric oxidation of volatile organic compounds (VOCs) from biogenic and anthropogenic...

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