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Heterogeneous reaction of N2O5 with illite and Arizona test dust particles

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons101302

Tang,  M. J.
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons101261

Schuster,  G.
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons100898

Crowley,  J. N.
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

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Citation

Tang, M. J., Schuster, G., & Crowley, J. N. (2014). Heterogeneous reaction of N2O5 with illite and Arizona test dust particles. Atmospheric Chemistry and Physics, 14(1), 245-254. doi:10.5194/acp-14-245-2014.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0024-9E2E-3
Abstract
The heterogeneous reaction of N2O5 with airborne illite and Arizona test dust (ATD) particles was investigated at room temperature and at different relative humidities using an atmospheric pressure aerosol flow tube. N2O5 at concentrations in the range 8 to 24 x 10(12) molecule cm(-3) was monitored using thermal-dissociation cavity ring-down spectroscopy at 662 nm. At zero relative humidity a large uptake coefficient of N2O5 to illite was obtained, gamma(N2O5) = 0.09, which decreased to 0.04 as relative humidity was increased to 67 %. In contrast, the uptake coefficient derived for ATD is much lower (similar to 0.006) and displays a weaker (if any) dependence on relative humidity (0-67 %). Potential explanations are given for the significant differences between the uptake behaviour for ATD and illite and the results are compared with uptake coefficients for N2O5 on other mineral surfaces.