Experimental study of the influence of ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Experimental study of the influence of hydrogen as a fuel additive on the formation of soot precursors and particles in atmospheric laminar premixed flames of methane
Auteur(s) :
Do, Hong-Quan [Auteur]
Tran, Luc-Sy [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Gasnot, Laurent [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Mercier, Xavier [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
El Bakali, Abderrahman [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Tran, Luc-Sy [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Gasnot, Laurent [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Mercier, Xavier [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
El Bakali, Abderrahman [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Titre de la revue :
Fuel
Nom court de la revue :
Fuel
Numéro :
In press
Pagination :
119517
Éditeur :
Elsevier BV
Date de publication :
2020-11-05
ISSN :
0016-2361
Résumé en anglais : [en]
We report here the experimental investigation of lightly sooting methane premixed flames with and without hydrogen. Two different approaches were considered to introduce hydrogen in the methane flame, either by keeping the ...
Lire la suite >We report here the experimental investigation of lightly sooting methane premixed flames with and without hydrogen. Two different approaches were considered to introduce hydrogen in the methane flame, either by keeping the total gas flow rate constant or not. Speciation data were obtained using a set of analytical tools including Gas Chromatography, Fourier-Transform Infrared Spectroscopy, Jet-Cooled Laser-Induced Fluorescence, Laser-induced Incandescence coupled with Cavity Ring-Down Spectroscopy. The results include mole fraction profiles of gaseous species (C0-C16) and soot volume fraction (fv) measured in all studied flames. These results demonstrate that the introduction of hydrogen to the flame insignificantly impacts the maximum mole fractions of small species (<C6) while it strongly influences the concentration of aromatics and fv. Interestingly, this influence is different, depending on how hydrogen was added to the reference methane flame. An excellent linear relationship between pyrene squared concentration [C16H10]2 and fv is demonstrated in all investigated flames. Moreover, hydrogen addition changes the slope of these data indicating a non-negligible impact of hydrogen on the rate of the soot nucleation process. These data and the observed linearity between fv and [C16H10]2 supports therefore the idea of a soot nucleation step initiated by a dimerization process implicating moderate-size polyaromatic hydrocarbons (PAHs) as pyrene. Finally, we note that PAH mole fractions at the beginning of soot formation highlight similar values regardless the flame conditions, which suggests that the inception of the soot formation might be dependent of a minimum concentration threshold of aromatic precursors required to initiate the soot nucleation process.Lire moins >
Lire la suite >We report here the experimental investigation of lightly sooting methane premixed flames with and without hydrogen. Two different approaches were considered to introduce hydrogen in the methane flame, either by keeping the total gas flow rate constant or not. Speciation data were obtained using a set of analytical tools including Gas Chromatography, Fourier-Transform Infrared Spectroscopy, Jet-Cooled Laser-Induced Fluorescence, Laser-induced Incandescence coupled with Cavity Ring-Down Spectroscopy. The results include mole fraction profiles of gaseous species (C0-C16) and soot volume fraction (fv) measured in all studied flames. These results demonstrate that the introduction of hydrogen to the flame insignificantly impacts the maximum mole fractions of small species (<C6) while it strongly influences the concentration of aromatics and fv. Interestingly, this influence is different, depending on how hydrogen was added to the reference methane flame. An excellent linear relationship between pyrene squared concentration [C16H10]2 and fv is demonstrated in all investigated flames. Moreover, hydrogen addition changes the slope of these data indicating a non-negligible impact of hydrogen on the rate of the soot nucleation process. These data and the observed linearity between fv and [C16H10]2 supports therefore the idea of a soot nucleation step initiated by a dimerization process implicating moderate-size polyaromatic hydrocarbons (PAHs) as pyrene. Finally, we note that PAH mole fractions at the beginning of soot formation highlight similar values regardless the flame conditions, which suggests that the inception of the soot formation might be dependent of a minimum concentration threshold of aromatic precursors required to initiate the soot nucleation process.Lire moins >
Comité de lecture :
Oui
Audience :
Non spécifiée
Établissement(s) :
Université de Lille
CNRS
CNRS
Équipe(s) de recherche :
PhysicoChimie de la Combustion (PC2)
Date de dépôt :
2020-11-07T22:56:08Z
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- Manuscript_H2_CH4_Lilloa-HAL.pdf
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