http://www.cnr.it/ontology/cnr/individuo/prodotto/ID42638
Surface Deposition and Coagulation Efficiency of Combustion Generated Nanoparticles in the Size Range from 1 to 10 nm (Articolo in rivista)
- Type
- Label
- Surface Deposition and Coagulation Efficiency of Combustion Generated Nanoparticles in the Size Range from 1 to 10 nm (Articolo in rivista) (literal)
- Anno
- 2005-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.proci.2004.08.267 (literal)
- Alternative label
D'Alessio A., Barone A.C., Cau R., D'Anna A. and Minutolo P. (2005)
Surface Deposition and Coagulation Efficiency of Combustion Generated Nanoparticles in the Size Range from 1 to 10 nm
in Proceedings of the Combustion Institute
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- D'Alessio A., Barone A.C., Cau R., D'Anna A. and Minutolo P. (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
- http://www.sciencedirect.com/science/article/pii/S0082078404003212 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- CNR ISTITUTO DI RICERCHE SULLA COMBUSTIONE UNIVERSITA DEGLI STUDI DI NAPOLI FEDERICO II FACOLTA DI INGEGNERIA DIP. INGEGNERIA CHIMICA (literal)
- Titolo
- Surface Deposition and Coagulation Efficiency of Combustion Generated Nanoparticles in the Size Range from 1 to 10 nm (literal)
- Abstract
- The size distribution of the nanoparticles formed in premixed ethylene-air flames and collected thermophoretically
on mica cleaved substrates is obtained by atomic force microscopy (AFM). The distribution
function extends from 1 to about 5 nm in non-sooting flames and in the soot pre-inception region of
the richer flames, while it becomes bimodal and larger particles are formed in the soot inception region of
the slightly sooting flames. The distribution is compared with the size distribution of nano-sized organic
carbon (NOC) and soot particles, obtained by ''in situ'' multi-wavelength extinction and light scattering
methods. The deposition efficiency is estimated from the differences between these two size distribution
functions as a function of the equivalent diameter of the nanoparticles. Furthermore, the coagulation coefficient
of particles in flame is obtained from the temporal evolution of the number concentration of the
nanoparticles inside the flames. NOC particles, which are rapidly produced in locally rich combustion
regions, have peculiar properties since their sticking coefficient both for coagulation and adhesion result
to be orders of magnitudes lower than that expected by larger aerosols, like soot particles. The experimental
results are interpreted by modelling the van der Waals interactions of the nanoparticles in terms of Lennard-
Jones potentials and in the framework of the gas kinetic theory. The estimated adhesion and
coagulation efficiencies are in good agreement with those calculated from AFM and optical data. The very
low efficiency values observed for the smaller particles could be ascribed to the high energy of these particles
due to their Brownian motion, which causes thermal rebound effects prevailing over adhesion mechanisms
due to van der Waals forces. (literal)
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- Autore CNR
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