Abstract
Photochemical aerosol formation in a heterogeneous multi-component system containing SO 2 , NO X , hydrocarbon and pre-existing particles is studied both experimentally and theoretically. Experiments are conducted for clarifying the role of pre-existing particles on photochemical aerosol formation by measuring the number concentration and the size distribution of particles. The most dominant gaseous reactant in photochemical aerosol formation is revealed to be SO 2 , and aerosol formation is affected by the surface area concentration of pre-existing particles. A kinetic model of aerosol formation is presented for the heterogeneous multi-component system, and simulated calculations using the kinetic model support the experimental results.
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