| Volumes and Issues Contents of Issue 2 |
www.atmos-chem-phys.net/4/439/2004/
© Author(s) 2004. This work is licensed
under a Creative Commons License.
Volatile particles formation during PartEmis: a modelling study
1Centre de Géochimie de la Surface, Université Louis Pasteur, Strasbourg, France
2Central Institute for Aviation Motors, Moskow, Russia
3Deutsches Zentrum für Luft- und Raumfahrt, Oberpfaffenhofen, Germany
4QinetiQ, Farnborough, UK
*now at: Atmospheric, Oceanic and Planetary Physics, University of Oxford, UK
Abstract. A modelling study of the formation of volatile particles in a combustor exhaust has been carried out in the frame of the PartEmis European project. A kinetic model has been used in order to investigate nucleation efficiency of the H2O-H2SO4 binary mixture in the sampling system. A value for the fraction
of the fuel sulphur S(IV) converted into S(VI) has been
indirectly deduced from comparisons between model results and measurements. In the present
study, ranges between roughly 2.5% and 6%, depending on the combustor settings and on
the value assumed for the parameter describing sulphuric acid wall losses. Soot particles hygroscopicity has also been investigated as
their activation is a key parameter for contrail formation. Growth factors of monodisperse
particles exposed to high relative humidity (95%) have been calculated and compared with
experimental results. The modelling study confirms that the growth factor increases as the
soot particle size decreases.Final Revised Paper (PDF, 217 KB) Discussion Paper (ACPD)
Citation: Vancassel, X., Sorokin, A., Mirabel, P., Petzold, A., and Wilson, C.: Volatile particles formation during PartEmis: a modelling study, Atmos. Chem. Phys., 4, 439-447, 2004. Bibtex EndNote Reference Manager
