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Formation of ClNO2 and HONO in the presence of NO2, O3 and wet NaCl aerosol

: Krüger, H.-U.; Behnke, W.; Scheer, V.; Zetzsch, C.

Journal of Aerosol Science 23 (1992), Suppl.1, pp.S933-S936
ISSN: 0021-8502
European Aerosol Conference <1992, Oxford>
Conference Paper
Fraunhofer ITA ( ITEM) ()
aerosol; atmospheric chemistry; chemistry; nitric oxide; photochemical smog; photochemistry; smog chamber; sticking coefficient

The sticking coefficient of N2O5 on NaCl aerosol alpha=0.032+/-0.003 is determined at 292.3+/-0.5K and various relative humidities, considering the decrease of the aerosol diameter during the reaction. The rate constant ratio for the consecutive chemical reaction leading to ClNO2 (a) or 2 HNO3 (b) is determined to be ka/kb=2.5+/-0.7. For a solution of 18 weight percent NaCl and pH values above 2 the ratio is independent of pH and decreases for low pH.