Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Uptake of phosgene by atmospheric clouds and sea-spray droplets

: Scheer, V.; Zetzsch, C.

Annales Geophysicae 13 (1995), Supplement 2, S.C380
ISSN: 0939-4176
ISSN: 0980-8752
ISSN: 0992-7689
ISSN: 0980-8760
ISSN: 1432-0576
European Geographical Society (General Assembly) <20, 1995, Hamburg>
Fraunhofer ITA ( ITEM) ()
air pollution; atmospheric chemistry; cloud; global warming; ozone; phosgene; photochemical degradation; photochemistry; physical chemistry; sea spray; theoretical chemistry; troposphere

Phosgene is a product of atmospheric degradation of chlorinated hydrocarbons initiated by OH radicals and Cl atoms. Sources and fate of phosgene are of interest since it has an impact on global warming and stratospheric ozone destruction. Since homogeneous gas phase reactions and photolysis are slow, heterogeneous hydrolysis of phosgene is the main sink in the troposphere. Measurements of the uptake rate over distilled water at various temperatures and different salt solutions using a wetted-wall flowtube technique will be presented. This method delivers the product of Henry's law constant and hydrolysis rate constant (...). The impact of heterogeneous hydrolysis on atmospheric lifetime will be discussed.