Advanced characterization of soot precursors ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Advanced characterization of soot precursors via excitation emission matrices fluorescence spectroscopy and molecular modeling
Auteur(s) :
Elias, Jessy [Auteur]
Agence de l'Environnement et de la Maîtrise de l'Énergie [ADEME]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Labarriere, Luc [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Faccinetto, Alessandro [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Moncomble, Aurélien [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Cornard, Jean-Paul [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Mercier, Xavier [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Agence de l'Environnement et de la Maîtrise de l'Énergie [ADEME]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Labarriere, Luc [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Faccinetto, Alessandro [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Moncomble, Aurélien [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Cornard, Jean-Paul [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Mercier, Xavier [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Titre de la revue :
Carbon
Nom court de la revue :
Carbon
Numéro :
228
Pagination :
119355
Éditeur :
Elsevier
Date de publication :
2024-07-14
ISSN :
0008-6223
Mot(s)-clé(s) en anglais :
Soot inception
Excitation -emission matrix
Laser induced fluorescence
Polycyclic aromatic hydrocarbons
Resonance -stabilized radicals
DFT calculations
Excitation -emission matrix
Laser induced fluorescence
Polycyclic aromatic hydrocarbons
Resonance -stabilized radicals
DFT calculations
Discipline(s) HAL :
Chimie/Chimie théorique et/ou physique
Sciences de l'ingénieur [physics]
Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]
Sciences de l'ingénieur [physics]
Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]
Résumé en anglais : [en]
Particulate emissions generated from combustion processes of hydrocarbon fuels (soot) have become a significant environmental issue with implications for both human health and climate change. However, soot particles also ...
Lire la suite >Particulate emissions generated from combustion processes of hydrocarbon fuels (soot) have become a significant environmental issue with implications for both human health and climate change. However, soot particles also offer exciting possibilities in the field of carbonaceous nanomaterials which have found applications in optoelectronics, bioimaging, drug delivery, and photocatalysis. This study aims to investigate the species implicated in the initial steps of soot particle formation characterized by the transformation of gaseous precursors, like polycyclic aromatic hydrocarbons (PAHs), into soot particles in the condensed phase. While PAHs have been long known to be soot precursors, recent researches suggest that resonance-stabilized radical (RSR) aromatic compounds may play a substantial role in this process. To shed light on this process, we conducted a series of experiments in a laminar diffusion sooting flame in controlled laboratory conditions, notably by implementing the excitation-emission matrix (EEM) method to study the optical properties of soot precursors. This innovative approach provides critical insights into the involvement of various kinds of aromatic species during the early steps of soot formation. In parallel with the experimental work, theoretical calculations were carried out to determine the spectral features of PAHs, PAH dimers, and resonance-stabilized PAH radicals. These calculations support the interpretation of the fluorescence EEM and assist the identification of species at the origin of soot inception. These findings contribute to a deeper understanding of the interplay between PAHs and persistent radicals, particularly at the onset of soot formation within flames.Lire moins >
Lire la suite >Particulate emissions generated from combustion processes of hydrocarbon fuels (soot) have become a significant environmental issue with implications for both human health and climate change. However, soot particles also offer exciting possibilities in the field of carbonaceous nanomaterials which have found applications in optoelectronics, bioimaging, drug delivery, and photocatalysis. This study aims to investigate the species implicated in the initial steps of soot particle formation characterized by the transformation of gaseous precursors, like polycyclic aromatic hydrocarbons (PAHs), into soot particles in the condensed phase. While PAHs have been long known to be soot precursors, recent researches suggest that resonance-stabilized radical (RSR) aromatic compounds may play a substantial role in this process. To shed light on this process, we conducted a series of experiments in a laminar diffusion sooting flame in controlled laboratory conditions, notably by implementing the excitation-emission matrix (EEM) method to study the optical properties of soot precursors. This innovative approach provides critical insights into the involvement of various kinds of aromatic species during the early steps of soot formation. In parallel with the experimental work, theoretical calculations were carried out to determine the spectral features of PAHs, PAH dimers, and resonance-stabilized PAH radicals. These calculations support the interpretation of the fluorescence EEM and assist the identification of species at the origin of soot inception. These findings contribute to a deeper understanding of the interplay between PAHs and persistent radicals, particularly at the onset of soot formation within flames.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Projet ANR :
Établissement(s) :
Université de Lille
CNRS
CNRS
Collections :
Équipe(s) de recherche :
Physicochimie de l’Environnement (PCE)
PhysicoChimie de la Combustion (PC2)
PhysicoChimie de la Combustion (PC2)
Date de dépôt :
2024-07-18T21:02:21Z
2024-08-23T12:15:55Z
2024-08-23T12:15:55Z