TY - JOUR
T1 - Atmospheric gas-aerosol equilibrium II. Analysis of common approximations and activity coefficient calculation methods
AU - Kim, Yong Pyo
AU - Seinfeld, John H.
AU - Saxena, Pradeep
N1 - Funding Information:
This work was supported by the Electric Power Research Institute under agreement RP3189-03.
PY - 1993/1/1
Y1 - 1993/1/1
N2 - The gas-aerosol equilibrium model, SCAPE, presented in Part I is used to evaluate the sensitivity of thermodynamic calculations of aerosol composition to common approximations and the choice of activity coefficient estimation method. The treatment of weak electrolytes, associated ammonia, NH3(aq), and bisulfate ion, HSO4 −, is analyzed. Comparisons of the three multi-component activity coefficient estimation methods are carried out with a variety of data. On the basis of the sensitivity analysis results, recommendations are provided for treating these electrolytes and for selecting an activity coefficient estimation method in atmospheric gas-aerosol equilibrium calculations. The two gas-aerosol equilibrium models, SCAPE and AIM, are compared. Remaining questions in gas-aerosol equilibrium are highlighted.
AB - The gas-aerosol equilibrium model, SCAPE, presented in Part I is used to evaluate the sensitivity of thermodynamic calculations of aerosol composition to common approximations and the choice of activity coefficient estimation method. The treatment of weak electrolytes, associated ammonia, NH3(aq), and bisulfate ion, HSO4 −, is analyzed. Comparisons of the three multi-component activity coefficient estimation methods are carried out with a variety of data. On the basis of the sensitivity analysis results, recommendations are provided for treating these electrolytes and for selecting an activity coefficient estimation method in atmospheric gas-aerosol equilibrium calculations. The two gas-aerosol equilibrium models, SCAPE and AIM, are compared. Remaining questions in gas-aerosol equilibrium are highlighted.
UR - http://www.scopus.com/inward/record.url?scp=0027643238&partnerID=8YFLogxK
U2 - 10.1080/02786829308959629
DO - 10.1080/02786829308959629
M3 - Article
AN - SCOPUS:0027643238
SN - 0278-6826
VL - 19
SP - 182
EP - 198
JO - Aerosol Science and Technology
JF - Aerosol Science and Technology
IS - 2
ER -