Title :

Dimers of polycyclic aromatic hydrocarbons: the missing pieces in the soot formation process

Author(s) :

Mercier, Xavier [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Carrivain, Olivier [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Irimiea, Cornélia [Auteur]
DMPE, ONERA, Université Paris Saclay (COmUE) [Palaiseau]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Faccinetto, Alessandro [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Therssen, Eric [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]

Journal title :

Physical Chemistry Chemical Physics

Pages :

8282-8294

Publisher :

Royal Society of Chemistry

Publication date :

2019

ISSN :

1463-9076

English keyword(s) :

laser induced fluorescence (LIF)
dimers of PAHs
polycyclic aromatic hydrocarbons (PAHs)
soot nucleation

HAL domain(s) :

Chimie/Chimie théorique et/ou physique
Chimie/Chimie organique

English abstract : [en]

The soot nucleation process, defined as the transition from molecular precursors to condensed matter, is the less understood step in the whole soot formation process. The possibility that polycyclic aromatic hydrocarbon ...
Show more >The soot nucleation process, defined as the transition from molecular precursors to condensed matter, is the less understood step in the whole soot formation process. The possibility that polycyclic aromatic hydrocarbon (PAH) dimers, especially those containing moderate-sized PAHs, can play a major role in soot nucleation is a very controversial issue. Although PAH dimers have often been considered as potential soot precursors, their formation is not thermodynamically favored at a typical flame temperature, their binding energies being considered too weak to allow them to survive in this environment. Hereby, we report experimental evidence supporting the existence of PAH dimers in the proximity of the soot nucleation region of a methane laminar diffusion flame that gives strong evidence for the nucleation process to be kinetically rather than thermodynamically controlled.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523

Source :

Harvested from HAL