Dimers of polycyclic aromatic hydrocarbons: the missing pieces in the soot formation process
| Autor: | Xavier Mercier, Alessandro Faccinetto, Eric Therssen, Cornelia Irimiea, Olivier Carrivain |
|---|---|
| Přispěvatelé: | Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 (PC2A), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), DMPE, ONERA, Université Paris Saclay (COmUE) [Palaiseau], ONERA-Université Paris Saclay (COmUE) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Binding energy
Nucleation General Physics and Astronomy Polycyclic aromatic hydrocarbon 02 engineering and technology medicine.disease_cause 01 natural sciences Methane chemistry.chemical_compound 0103 physical sciences medicine Physical and Theoretical Chemistry chemistry.chemical_classification 010304 chemical physics Chemistry [CHIM.ORGA]Chemical Sciences/Organic chemistry Diffusion flame Laminar flow 021001 nanoscience & nanotechnology Soot Adiabatic flame temperature [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry 13. Climate action Chemical physics polycyclic aromatic hydrocarbons (PAHs) laser induced fluorescence (LIF) soot nucleation 0210 nano-technology dimers of PAHs |
| Zdroj: | Physical Chemistry Chemical Physics Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2019, 21 (16), pp.8282-8294. ⟨10.1039/c9cp00394k⟩ Physical Chemistry Chemical Physics, 2019, 21 (16), pp.8282-8294. ⟨10.1039/c9cp00394k⟩ |
| ISSN: | 1463-9076 1463-9084 |
| DOI: | 10.1039/c9cp00394k⟩ |
| Popis: | International audience; 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. |
| Databáze: | OpenAIRE |
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