TY - CHAP
T1 - Analysis of Chamber Data
AU - Seakins, Paul W.
AU - Allanic, Arnaud
AU - Jammoul, Adla
AU - Mellouki, Albelwahid
AU - Muñoz, Amalia
AU - Rickard, Andrew R.
AU - Doussin, Jean-François
AU - Kleffmann, Jorg
AU - Kangasluoma, Juha
AU - Lehtipalo, Katrianne
AU - Cain, Kerrigan
AU - Dada, Lubna
AU - Kulmala, Markku
AU - Cazaunau, Mathieu
AU - Newland, Mike J.
AU - Ródenas, Mila
AU - Wiesen, Peter
AU - Jorga, Spiro
AU - Pandis, Spyros
AU - Petäjä, Tuukka
PY - 2023/4/24
Y1 - 2023/4/24
N2 - In this chapter, we focus on aspects of analysis of typical simulation chamber experiments and recommend best practices in term of data analysis of simulation chamber results relevant for both gas phase and particulate phase atmospheric chemistry. The first two sections look at common gas-phase measurements of relative rates and product yields. The simple yield expressions are extended to account for product removal. In the next two sections, we examine aspects of particulate phase chemistry looking firstly at secondary organic aerosol (SOA) yields including correction for wall losses, and secondly at new particle formation using a variety of methods. Simulations of VOC oxidation processes are important components of chamber work and one wants to present methods that lead to fundamental chemistry and not to specific aspects of the chamber that the experiment was carried out in. We investigate how one can analyse the results of a simulation experiment on a well-characterized chemical system (ethene oxidation) to determine the chamber-specific corrections. Finally, we look at methods of analysing photocatalysis experiments, some with a particular focus on NOx reduction by TiO2-doped surfaces. In such systems, overall reactivity is controlled by both chemical processes and transport. Chambers can provide useful practical information, but care needs to be taken in extrapolating results to other conditions. The wider impact of surfaces on photosmog formation is also considered.
AB - In this chapter, we focus on aspects of analysis of typical simulation chamber experiments and recommend best practices in term of data analysis of simulation chamber results relevant for both gas phase and particulate phase atmospheric chemistry. The first two sections look at common gas-phase measurements of relative rates and product yields. The simple yield expressions are extended to account for product removal. In the next two sections, we examine aspects of particulate phase chemistry looking firstly at secondary organic aerosol (SOA) yields including correction for wall losses, and secondly at new particle formation using a variety of methods. Simulations of VOC oxidation processes are important components of chamber work and one wants to present methods that lead to fundamental chemistry and not to specific aspects of the chamber that the experiment was carried out in. We investigate how one can analyse the results of a simulation experiment on a well-characterized chemical system (ethene oxidation) to determine the chamber-specific corrections. Finally, we look at methods of analysing photocatalysis experiments, some with a particular focus on NOx reduction by TiO2-doped surfaces. In such systems, overall reactivity is controlled by both chemical processes and transport. Chambers can provide useful practical information, but care needs to be taken in extrapolating results to other conditions. The wider impact of surfaces on photosmog formation is also considered.
U2 - 10.1007/978-3-031-22277-1_7
DO - 10.1007/978-3-031-22277-1_7
M3 - Chapter
SN - 9783031222771
SP - 241
EP - 291
BT - A Practical Guide to Atmospheric Simulation Chambers
A2 - Doussin, Jean-François
A2 - Fuchs, Hendrik
A2 - Kiendler-Scharr, Astrid
A2 - Seakins, Paul
A2 - Wenger, John
PB - Springer International Publishing AG
CY - Cham
ER -