Formation of highly oxygenated organic molecules from α-pinene photochemistry / Sungah Kang. Jülich : Forschungszentrum Jülich GmbH, Zentralbibliothek, Verlag, [2021], copyright: 2021
Inhalt
- Leere Seite
- Declaration of Authorship
- Acknowledgements
- Abstract
- Introduction
- Highly oxygenated organic molecules
- Volatile Organic Compounds in the atmosphere
- Secondary Organic Aerosol (SOA)
- Highly Oxygenated organic Molecules (HOM)
- HOM formation: atmospheric VOC oxidation by OH and O3
- Atmospheric oxidants
- Classical photochemistry and peroxy radicals
- Autoxidation and HOM formation
- Importance of alkoxy radicals
- Goals of the thesis
- Experiments and Methods
- Experimental setup
- Chemical Ionisatiton Mass Spectrometer (CIMS)
- Data Evaluation
- Corrections and assumptions
- Photochemical oxidation of -pinene: Dependency on OH concentration and effect of CO and small peroxy radicals
- Ozonolysis of -pinene
- Mass spectrum of -pinene ozonolysis
- Comparison of mass spectra of -pinene ozonolysis in different experiments
- Photochemical oxidation of -pinene: Dependency on OH concentration
- Effect of increasing turnover on the concentration of sum of HOM, monomers and accretion products
- Changes of families with increasing turnover
- Closer look into families: Marker analysis
- Photochemical oxidation of -pinene: Effect of CO
- Mass spectrum comparison
- Monomer and accretion product comparison
- The effect of CO on C10 and C20 families
- The effect of CO on C10 and C20 marker compounds
- Photochemical oxidation of -pinene: Effect of isoprene
- Photochemical oxidation of -pinene: Impact of NOx
- Monomer HOM pattern change
- Fragmentation
- Accretion product suppression
- Alkoxy-peroxy pathway
- Family analysis
- Concluding the effect of NOx on -pinene photooxidation
- Summary, conclusion and outlook
- Bibliography
- Peaklists
- -pinene OH oxidation
- -pinene OH oxidation in the presence of CO
- -pinene OH oxidation in the presence of isoprene
- -pinene OH oxidation in the presence of NOx
- CIMS analyzer
- Abbreviation
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