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| Titel |
Compilation and evaluation of gas phase diffusion coefficients of reactive trace gases in the atmosphere: volume 1. Inorganic compounds |
| VerfasserIn |
M. J. Tang, R. A. Cox, M. Kalberer |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 17 ; Nr. 14, no. 17 (2014-09-08), S.9233-9247 |
| Datensatznummer |
250119011
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| Publikation (Nr.) |
 copernicus.org/acp-14-9233-2014.pdf |
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| Zusammenfassung |
| Diffusion of gas molecules to the surface is the first step for all
gas–surface reactions. Gas phase diffusion can influence and sometimes even
limit the overall rates of these reactions; however, there is no database of
the gas phase diffusion coefficients of atmospheric reactive trace gases.
Here we compile and evaluate, for the first time, the diffusivities
(pressure-independent diffusion coefficients) of atmospheric inorganic
reactive trace gases reported in the literature. The measured diffusivities
are then compared with estimated values using a semi-empirical method
developed by Fuller et al. (1966). The diffusivities estimated using
Fuller's method are typically found to be in good agreement with the
measured values within ±30%, and therefore Fuller's method can be
used to estimate the diffusivities of trace gases for which experimental
data are not available. The two experimental methods used in the atmospheric
chemistry community to measure the gas phase diffusion coefficients are also
discussed. A different version of this compilation/evaluation, which will be
updated when new data become available, is uploaded online
(https://sites.google.com/site/mingjintang/home/diffusion). |
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