Development & Testing of Novel Atmospheric Chemistry Technologies

<p>Atmospheric aerosols play an important role in global atmospheric chemistry and climate and have a detrimental impact on human health. Advancements in measurement technologies allow for better monitoring of atmospheric composition and dynamics, creating better predictive models and understanding of atmospheric chemistry and physics. Gas and particle atmospheric oxidation is poorly understood. In order to create a better understanding of atmospheric oxidation, the following equipment was developed: 1) a Potential Aerosol Mass: PAM) flow reaction chamber was developed to create reproducible steady-state oxidation of organic species in a controlled laboratory setting, 2) a custom combustion chamber for introduction of realistic single source samples, and 3) a Thermal desorption Aerosol Gas chromatograph: TAG) for hourly speciation of hundreds of semi-volatile and non-volatile organic compounds. Development and construction of the Combustion Chamber, PAM Chamber, and TAG system are discussed as well as preliminary applications of this equipment. These instruments allow for the study of primary organic aerosol: POA) and secondary organic aerosol: SOA) formation. Due to the lack of knowledge concerning organic aerosol source chemical profiles and subsequent chemical evolution in the atmosphere, these studies are crucial for furthering the understanding of atmospheric chemistry and in developing accurate atmospheric models.</p>

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Energy, Environmental and Chemical Engineering

Year dc:date.available

2012

Author dc:creator

• Mellott, Peter Johnson

Contributors dc:contributor

• Brent Williams

• Aerosol
• TAG
• PAM
• Photooxidation
• Instrumentation
• Engineering

Language dc:language

English (en)

DOI

https://doi.org/10.7936/K7QZ281X

OAI identifier oai:identifier

oai:openscholarship.wustl.edu:etd-2039