Box model studies of the secondary organic aerosol formation under different HC/NOxconditions using the subset of the Master Chemical Mechanism forα-pinene oxidation

2008 ◽  
Vol 113 (D10) ◽  
Author(s):  
Adam G. Xia ◽  
Diane V. Michelangeli ◽  
Paul A. Makar
Keyword(s):  
Secondary Organic Aerosol ◽  
Organic Aerosol ◽  
Box Model ◽  
Chemical Mechanism ◽  
Aerosol Formation ◽  
Model Studies ◽  
Master Chemical Mechanism ◽  
Secondary Organic Aerosol Formation

scholarly journals Influence of NO<sub>2</sub> on secondary organic aerosol formation from ozonolysis of limonene

2017 ◽  
Author(s):  
Changjin Hu ◽  
Qiao Ma ◽  
Zhi Liu ◽  
Yue Cheng ◽  
Liqing Hao ◽  
...  
Keyword(s):  
Experimental Data ◽  
Secondary Organic Aerosols ◽  
Secondary Organic Aerosol ◽  
Organic Aerosols ◽  
Organic Aerosol ◽  
Chemical Mechanism ◽  
Aerosol Formation ◽  
Model Simulations ◽  
Negative Effect ◽  
Master Chemical Mechanism

Abstract. Limonene has a strong tendency to undergo ozonolysis to form semi-volatile and low-volatility compounds that contribute to secondary organic aerosols (SOAs) both outdoors and indoors. The influence of NO2 on SOA formation from ozonolysis of limonene has been evaluated using chamber experiments and the Master Chemical Mechanism (MCM) coupled with a gas-particle partitioning model in this work. A series of 21 indoor chamber experiments were carried out with or without NO2 under different [O3]0 / [VOC]0 ratios, and these experimental data were compared with the model simulations. Agreement in SOA yields was observed between the experimental observations and model simulations under varying conditions. Generally, SOA mass yields are positively dependent on [O3]0 / [VOC]0 without the presence of NO2. However, the introduction of NO2 leads to a more complicated change in SOA yield, which is shown to be related to initial [O3] / [VOC] ratios. When [O3]0 / [VOC]0 > 2, the introduction of NO2 results in an increase of SOA yield in the range of NO2 studied in this work; whereas a weak negative effect was found for SOA formation according to the introduction of ~ 250 ppbv NO2 under [O3]0 / [VOC]0 

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