Coupling of ToF-SIMS and Raman Spectroscopy for the Characterization of the Chemical Species Involved in the Soot Nucleation Process

Jessy Elias (1) , Alessandro Faccinetto (1) , Nicolas Nuns (2) , Claire Pirim (3) , Cristian Focsa (3) , Xavier Mercier (1)

1 PC2A - Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522
2 IMMCL - Institut des Molécules et de la Matière Condensée de Lille
3 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523

Time-of-flight secondary ion mass spectrometry (ToF-SIMS) and Raman spectroscopy are used to characterize samples extracted from a laboratory methane diffusion flame at different reaction times along the flame axis in order to gain information on the soot nucleation process. Experimental results from the comparison of these techniques allow the chemical characterization of the gas to soot particles phase transition and the quantification of the hydrogen content of the sampled matter. Before soot formation, no phase separation is observed on the samples, while after soot formation, a phase separation appears with two families of PAHs and a difference in the Raman signal.

Domains: Chemical Sciences

Jessy Elias, Alessandro Faccinetto, Nicolas Nuns, Claire Pirim, Cristian Focsa, et al.. Coupling of ToF-SIMS and Raman Spectroscopy for the Characterization of the Chemical Species Involved in the Soot Nucleation Process. 10th European Combustion Meeting, Apr 2021, Napoli, Italy. ⟨hal-03375862⟩