scholarly journals Chemistry of stabilized Criegee intermediates in the CLOUD chamber

2013 ◽  
Author(s):  
Nina Sarnela ◽  
Mikko Sipilä ◽  
Tuija Jokinen ◽  
Heikki Junninen ◽  
CLOUD Collaboration
Keyword(s):  
Cloud Chamber ◽  
Criegee Intermediates ◽  
Stabilized Criegee Intermediates

scholarly journals Measurement-model comparison of stabilized Criegee Intermediate and Highly Oxygenated Molecule production in the CLOUD chamber

2017 ◽  
Author(s):  
Nina Sarnela ◽  
Tuija Jokinen ◽  
Jonathan Duplissy ◽  
Chao Yan ◽  
Tuomo Nieminen ◽  
...  
Keyword(s):  
Sulphuric Acid ◽  
Model Comparison ◽  
Cloud Condensation Nuclei ◽  
Measurement Model ◽  
Cloud Chamber ◽  
Oxidation Products ◽  
Atmospheric Oxidation ◽  
European Organization ◽  
Criegee Intermediates ◽  
Stabilized Criegee Intermediates

Abstract. Atmospheric oxidation is an important phenomenon, which produces large quantities of low-volatile compounds such as sulphuric acid and oxidised organic compounds. Such species may be involved in nucleation of particles and enhance their subsequent growth to reach the size of cloud condensation nuclei (CCN). In this study, we investigate α-pinene, the most abundant monoterpene globally, and its oxidation products formed through the ozonolysis in the Cosmic Leaving OUtdoors Droplets (CLOUD) chamber at CERN (the European Organization for Nuclear Research). By scavenging hydroxyl radicals (OH) with hydrogen (H2), we were able to investigate the formation of Highly Oxygenated Molecules (HOM) purely driven by ozonolysis, and study the oxidation of sulphur dioxide (SO2) driven by stabilized Criegee Intermediates (sCI). We measured the concentrations of HOM and sulphuric acid with a chemical ionization atmospheric pressure interface time-of-flight (CI-APi-TOF) mass spectrometer and compared the measured concentrations with simulated concentrations calculated with a dynamic model. We found molar yields in the range of 3.5–6.5 % for the HOM formation and 22–32 % for the formation of stabilized Criegee Intermediates by fitting our model to the measured concentrations. The simulated time evolution of the ozonolysis products was in good agreement with measured concentrations except that in some of the experiments sulphuric acid formation was faster than simulated. The results shown here are consistent with the recently published yields for HOM formation from different laboratory experiments. Together with the sCI yields, these results help to understand atmospheric oxidation processes better and make the reaction parameters more comprehensive for broader use.

scholarly journals Measurement–model comparison of stabilized Criegee intermediate and highly oxygenated molecule production in the CLOUD chamber

2018 ◽  
Vol 18 (4) ◽  
pp. 2363-2380 ◽  
Author(s):  
Nina Sarnela ◽  
Tuija Jokinen ◽  
Jonathan Duplissy ◽  
Chao Yan ◽  
Tuomo Nieminen ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Model Comparison ◽  
Cloud Condensation Nuclei ◽  
Measurement Model ◽  
Cloud Chamber ◽  
Oxidation Products ◽  
Atmospheric Oxidation ◽  
European Organization ◽  
Criegee Intermediates ◽  
Stabilized Criegee Intermediates

Abstract. Atmospheric oxidation is an important phenomenon which produces large quantities of low-volatility compounds such as sulfuric acid and oxidized organic compounds. Such species may be involved in the nucleation of particles and enhance their subsequent growth to reach the size of cloud condensation nuclei (CCN). In this study, we investigate α-pinene, the most abundant monoterpene globally, and its oxidation products formed through ozonolysis in the Cosmic Leaving OUtdoor Droplets (CLOUD) chamber at CERN (the European Organization for Nuclear Research). By scavenging hydroxyl radicals (OH) with hydrogen (H2), we were able to investigate the formation of highly oxygenated molecules (HOMs) purely driven by ozonolysis and study the oxidation of sulfur dioxide (SO2) driven by stabilized Criegee intermediates (sCIs). We measured the concentrations of HOM and sulfuric acid with a chemical ionization atmospheric-pressure interface time-of-flight (CI-APi-TOF) mass spectrometer and compared the measured concentrations with simulated concentrations calculated with a kinetic model. We found molar yields in the range of 3.5–6.5 % for HOM formation and 22–32 % for the formation of stabilized Criegee intermediates by fitting our model to the measured sulfuric acid concentrations. The simulated time evolution of the ozonolysis products was in good agreement with measured concentrations except that in some of the experiments sulfuric acid formation was faster than simulated. In those experiments the simulated and measured concentrations met when the concentration reached a plateau but the plateau was reached 20–50 min later in the simulations. The results shown here are consistent with the recently published yields for HOM formation from different laboratory experiments. Together with the sCI yields, these results help us to understand atmospheric oxidation processes better and make the reaction parameters more comprehensive for broader use.

Theoretical studies of the hydration reactions of stabilized Criegee intermediates from the ozonolysis of β-pinene

RSC Advances ◽  
2014 ◽  
Vol 4 (54) ◽  
pp. 28490 ◽  
Author(s):  
Xiao-Xiao Lin ◽  
Yi-Rong Liu ◽  
Teng Huang ◽  
Kang-Ming Xu ◽  
Yang Zhang ◽  
...  
Keyword(s):  
Theoretical Studies ◽  
Criegee Intermediates ◽  
Stabilized Criegee Intermediates

Computational Study of the Reaction between Biogenic Stabilized Criegee Intermediates and Sulfuric Acid

2007 ◽  
Vol 111 (17) ◽  
pp. 3394-3401 ◽  
Author(s):  
Theo Kurtén ◽  
Boris Bonn ◽  
Hanna Vehkamäki ◽  
Markku Kulmala
Keyword(s):  
Sulfuric Acid ◽  
Computational Study ◽  
Criegee Intermediates ◽  
Stabilized Criegee Intermediates
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