Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 20, issue 6
Articles | Volume 20, issue 6
https://doi.org/10.5194/acp-20-3669-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-20-3669-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 6
Technical note
 | 
26 Mar 2020
Technical note |  | 26 Mar 2020

Technical note: Determination of binary gas-phase diffusion coefficients of unstable and adsorbing atmospheric trace gases at low temperature – arrested flow and twin tube method

Stefan Langenberg, Torsten Carstens, Dirk Hupperich, Silke Schweighoefer, and Ulrich Schurath

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Short summary
Gas-phase diffusion is the first step for all heterogeneous reactions under atmospheric conditions. Therefore, we have used two complementary methods for the measurement of diffusion coefficients in the temperature range of 200–300 K: the arrested flow method is best suited for unstable gases (ozone, dinitrogen pentoxide, chlorine nitrate), and the twin tube method is best suited for stable but adsorbing trace gases (nitrogen dioxide, dinitrogen tetroxide).
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