TY  - THES
AB  - This dissertation advances the modeling of particulate matter formation in atmospheric aerosols containing organic compounds, inorganic salts, and water. A thermodynamic framework is developed that allows unrestricted gas–particle partitioning and liquid–liquid phase separation, supported by X‑UNIFAC.2, an extended activity‑coefficient model incorporating middle‑range ionic interactions. Model predictions show good agreement with chamber measurements of secondary organic aerosol formation. The work further extends the two‑product SOA model to account for humidity effects, water uptake, activity coefficients, molecular weight variation, and phase separation. Together, these improvements enhance the physical realism and predictive capability of aerosol models used in atmospheric chemistry.
AD  - Oregon Health and Science University
AU  - Chang, Elsa
DA  - 2008
DO  - 10.6083/M4TX3CBR
DO  - DOI
ED  - Pankow, James
ED  - Advisor
ID  - 303
KW  - Electrolytes
KW  - Particulate Matter
KW  - Aerosols
KW  - Thermodynamics
KW  - chemical equilibrium
KW  - secondary organic aerosols
KW  - atmospheric particulate matter
KW  - activity coefficients
KW  - atmospheric aerosols
L1  - https://digitalcollections.ohsu.edu/record/303/files/303_etd.pdf
L2  - https://digitalcollections.ohsu.edu/record/303/files/303_etd.pdf
L4  - https://digitalcollections.ohsu.edu/record/303/files/303_etd.pdf
LK  - https://digitalcollections.ohsu.edu/record/303/files/303_etd.pdf
N2  - This dissertation advances the modeling of particulate matter formation in atmospheric aerosols containing organic compounds, inorganic salts, and water. A thermodynamic framework is developed that allows unrestricted gas–particle partitioning and liquid–liquid phase separation, supported by X‑UNIFAC.2, an extended activity‑coefficient model incorporating middle‑range ionic interactions. Model predictions show good agreement with chamber measurements of secondary organic aerosol formation. The work further extends the two‑product SOA model to account for humidity effects, water uptake, activity coefficients, molecular weight variation, and phase separation. Together, these improvements enhance the physical realism and predictive capability of aerosol models used in atmospheric chemistry.
PB  - Oregon Health and Science University
PY  - 2008
T1  - Development and application of thermodynamic models of chemical equilibrium in multi-phase organic/electrolyte/water mixtures for prediction of atmospheric organic particulate matter levels
TI  - Development and application of thermodynamic models of chemical equilibrium in multi-phase organic/electrolyte/water mixtures for prediction of atmospheric organic particulate matter levels
UR  - https://digitalcollections.ohsu.edu/record/303/files/303_etd.pdf
Y1  - 2008
ER  -