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Title page for ETD etd-06172005-161815


Type of Document Dissertation
Author Bian, Fei
URN etd-06172005-161815
Title A Model for Lumping Atmospheric Secondary Organic Aerosol and Its Application in Air Quality Modeling
Degree PhD
Department Chemical Engineering
Advisory Committee
Advisor Name Title
Frank M. Bowman Committee Chair
Alan R. Bowers Committee Member
G. Kane Jennings Committee Member
Karl B. Schnelle, Jr. Committee Member
Robert D. Tanner Committee Member
Keywords
  • secondary organic aerosol
  • lumping
  • temperature dependence
  • composition dependence
  • partitioning
  • air quality modeling
Date of Defense 2005-06-14
Availability unrestricted
Abstract
This dissertation presents an original theoretical model that lumps the multiple secondary organic aerosol (SOA) components in an organic aerosol mixture into a few lumped compounds, accounting for both temperature and aerosol composition effects on SOA partitioning behavior. The partitioning properties of the lumped groups were derived from those of the individual components. The model was tested and compared with smog chamber experimental data and other theoretical estimates, and was shown to predict the gas-particle partitioning behavior of the overall mixture well. The model was applied to SOA products formed from multiple hydrocarbon precursors to develop a new SOA formulation for application in the Community Multiscale Air Quality (CMAQ) model. The partitioning behavior predicted by the new formulation was compared to experimental data and was shown to be a reasonable approximation.
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