Effect of NOx and RH on the secondary organic aerosol formation from toluene photooxidation

2022 ◽  
Author(s):  
Shijie Liu ◽  
Xiaodi Liu ◽  
Yiqian Wang ◽  
Si Zhang ◽  
Can Wu ◽  
...  
Keyword(s):  
Secondary Organic Aerosol ◽  
Organic Aerosol ◽  
Aerosol Formation ◽  
Secondary Organic Aerosol Formation ◽  
Toluene Photooxidation

scholarly journals Secondary organic aerosol formation from toluene photooxidation under various NO<sub>x</sub> conditions and particle acidity

2008 ◽  
Vol 8 (4) ◽  
pp. 14467-14495 ◽  
Author(s):  
G. Cao ◽  
M. Jang
Keyword(s):  
Secondary Organic Aerosol ◽  
Organic Aerosol ◽  
Aerosol Formation ◽  
Organic Mass ◽  
Humidity Effect ◽  
Toluene Concentration ◽  
Acidic Sulfate ◽  
Secondary Organic Aerosol Formation ◽  
Toluene Photooxidation ◽  
Teflon Film

Abstract. Secondary organic aerosol (SOA) formation from photooxidation of toluene is studied using a 2 m3 indoor Teflon film chamber under three different NOx conditions: low (≤3 ppb), intermediate (90–105 ppb) and high (280–315 ppb). SOA experiments are conducted in the presence of either neutral or acidic sulfate seed aerosols under two different humidity levels (%RH 15–22 or 38–49). NOx concentrations in the chamber air affect not only SOA yields but also SOA growth described by the organic mass (OM) produced as a function of the toluene concentration consumed over the course of a single SOA experiment. The particle acidity effect on toluene SOA formation varies with NOx concentrations. For the low and the intermediate NOx experiments, SOA yields with acidic sulfate seed considerably increase by: 36%–115% at low %RH and 25–44% at high %RH compared to those with neutral seed. No significant particle acidity effect is observed for the high NOx experiments. The humidity effect on SOA formation is also different at the three NOx levels. For the low NOx experiments, SOA yields are 29%–34% lower at high %RH than those at low %RH in the presence of either neutral or acidic sulfate seed. For the intermediate NOx experiments, SOA yields at high %RH increase by 39% in the presence of neutral seed but slightly decrease by 7% in the presence of acidic sulfate seed compared to those at low %RH. For the high NOx experiments with a high NO fraction, no significant humidity effect on SOA yields is found with both neutral and acidic sulfate seeds.

Secondary organic aerosol formation from untreated exhaust of gasoline four-stroke motorcycles

Urban Climate ◽  
2021 ◽  
Vol 36 ◽  
pp. 100778
Author(s):  
Sepideh Esmaeilirad ◽  
Ari Setyan ◽  
Jing Wang ◽  
Vahid Hosseini
Keyword(s):  
Secondary Organic Aerosol ◽  
Organic Aerosol ◽  
Aerosol Formation ◽  
Secondary Organic Aerosol Formation

scholarly journals Secondary organic aerosol formation from isoprene photooxidation under high-NOxconditions

2005 ◽  
Vol 32 (18) ◽  
pp. n/a-n/a ◽  
Author(s):  
Jesse H. Kroll ◽  
Nga L. Ng ◽  
Shane M. Murphy ◽  
Richard C. Flagan ◽  
John H. Seinfeld
Keyword(s):  
Secondary Organic Aerosol ◽  
Organic Aerosol ◽  
Aerosol Formation ◽  
Secondary Organic Aerosol Formation

A chamber study of secondary organic aerosol formation by linalool ozonolysis

2009 ◽  
Vol 43 (25) ◽  
pp. 3935-3940 ◽  
Author(s):  
Xi Chen ◽  
Philip K. Hopke
Keyword(s):  
Secondary Organic Aerosol ◽  
Organic Aerosol ◽  
Aerosol Formation ◽  
Chamber Study ◽  
Secondary Organic Aerosol Formation
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