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1 PhLAM - Physique des Lasers, Atomes et Molécules 2 Institut de Radioprotection et de Sûreté Nucléaire IRSN 3 Palaiseau - ONERA - The French Aerospace Lab 4 PC2A - Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522

Abstract : The present work has been performed in the framework of the French national project MERMOSE, which aims to characterize the soot emissions from airplane engines and to determine their role in the formation of cirrus clouds. A first sampling campaign performed on the PowerJet SaM-146 turbofan SNECMA-Saturn provided soot particles collected on quartz fiber filters in four engine regimes 30 %, 70 %, 85 % and 100 %. Two-Step Desorption-Ionization Laser Mass Spectrometry L2MS and Time of Fight Secondary Ion Mass Spectrometry ToF-SIMS techniques were used to analyze the surface chemical composition of the soot particles, with special focus on PAHs. In L2MS, the adsorbed phase is probed by nanosecond laser desorption 532nm, then the ejected molecules are ionized with a second ns laser 266nm and further mass-separated by ToF-MS.

Mots-clés : SOOT PAH AVIATION LASER DESORPTION SIMS





Autor: C. Irimea - I.K. Ortega - Y. Carpentier - M. Ziskind - F.X. Ouf - F. Salm - D. Delhaye - D. Gaffié - A. Faccinetto - C. Focsa -

Fuente: https://hal.archives-ouvertes.fr/



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