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Growth of water-sulphuric acid (H(2)O-H(2)SO(4)) aerosol resulting from condensation was studied as an isolated process in a batch reactor. Simultaneous measurement of aerosol distribution changes and the H(2)SO(4) formation rate allowed the determination of the accommodation coefficient of H(2)SO(4) on H(2)O-H(2)SO(4) particles. For particles within a size range between 0.05 and 0.5 micron, and for a relative humidity of 50%, the accommodation coefficient was found to be between 0.02 and 0.09 (90% confidence limits). The Fuchs-Sutugin interpolation formula was adopted for describing the condensation process. The Sitarski-Nowakowski formula gave the same result within the particle size range under study. Computer simulations of the aerosol distribution evolution during condensational growth, making use of a value for alpha within the experimental range, were performed as an independent test and showed excellent agreement with the experimental data.

Additional information

Authors: VAN DINGENEN R, State University of Gent, Nuclear Physics Laboratory (BE);RAES F, JRC Ispra (IT)
Bibliographic Reference: Article: Aerosol Science and Technology, Vol. 15 (1991) pp. 93-106
Record Number: 199111632 / Last updated on: 1994-12-02
Original language: en
Available languages: en