http://www.cnr.it/ontology/cnr/individuo/prodotto/ID42548
Distribution of Soot Molecular Weight/Size along Premixed Flames as Inferred by Size Exclusion Chromatography. (Articolo in rivista)
- Type
- Label
- Distribution of Soot Molecular Weight/Size along Premixed Flames as Inferred by Size Exclusion Chromatography. (Articolo in rivista) (literal)
- Anno
- 2007-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1021/ef060320p (literal)
- Alternative label
Alfe, M.; Apicella, B.; Barbella, R.; Tregrossi, A.; Ciajolo, A. (2007)
Distribution of Soot Molecular Weight/Size along Premixed Flames as Inferred by Size Exclusion Chromatography.
in Energy & fuels (Print); ACS, American chemical society, Washington, DC (Stati Uniti d'America)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Alfe, M.; Apicella, B.; Barbella, R.; Tregrossi, A.; Ciajolo, A. (literal)
- Pagina inizio
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Istituto di Ricerche sulla Combustione, CNR (literal)
- Titolo
- Distribution of Soot Molecular Weight/Size along Premixed Flames as Inferred by Size Exclusion Chromatography. (literal)
- Abstract
- The evolution of size/molecular weight (MW) of soot from inception to mature soot was studied by means
of size exclusion chromatography (SEC) coupled with on-line UV-visible spectroscopy of soot sampled along
the flame axis of ethylene, hexane, and benzene premixed flames. Polystyrene calibration and microfiltration
were used for the evaluation of the soot MW and size, respectively. Overall, soot exhibited a wide MW/size
distribution peaking in two main regions, well detached from each other. The first corresponds with particles/
aggregates having MW > 20 000 u, here called the \"particle-size region\", and the second one corresponds
with molecules in the 100-5000 u MW range called the \"molecular-size region\". The components in the
particle-size regions dominated, particularly downstream of the flames and everywhere in the benzene flame.
Two classes of components were evident in the particle-size region: one with d > 20 nm (MW > 59 500 u)
and the second class well below 20 nm discriminated by SEC, coupled with microfiltration. Meaningful
differences in the relative contributions of these two classes were found to occur along the flames, affected by
the fuel aromaticity, and they were signatures of the soot growth process and of the different soot inception
mechanisms in aliphatic and benzene flames respectively. (literal)
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