Combustion-Generated Nanoparticles of Organic Carbon in Flames and Engine Exhausts Università di Napoli "Federico II"

Format:

Conference/Event

Author/Creator:

D'Alessio, D'Alessio, author.

Contributor:

Barone, A. C.

Borghese, A.

D'Anna, A.

Minutolo, P.

Speranza, L.

Conference Name:

7th International Conference on Engines for Automobile (2005-09-11 : Naples, Italy)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Naples, ITALY Consiglio Nazionale delle Ricerche 2005

Summary:

Aerosols produced by combustion processes have a relevant impacton the chemistry and physics of the atmosphere and on human health.Soot particles are one of the main constituents of the elementalcarbon present in the atmosphere, but the role of combustionprocesses in the formation of organic carbon, which is moreabundant than the elemental one in the atmosphere, is less wellcharacterized.Nanoparticles of Organic Carbon (NOC) have been detected inlaminar flames employing a variety of experimental diagnostics andsome of their chemical and physical properties have beencharacterized.NOC are not easily detected at the exhausts of practicalcombustion devices like vehicles equipped with spark ignition ordiesel engines because the current available instrumentations donot allow detection of nanoparticles smaller than 3 nm. Also, thenumber concentration of nanoparticles smaller than 10 nm isstrongly variable with temperatures and flow rates of the exhaustproducts.The purpose of this paper is to review the characteristics ofNOC and to show that these particles are also emitted fromcommercial combustion devices. Different measurement techniques areused to analyze the size and mass concentrations of particulatesincluding UV-visible absorption spectroscopy and Atomic ForceMicroscopy. These techniques have been applied in laboratory flamesand at the exhausts of vehicles equipped with a common-rail dieselengine and a fuel port injection Place of publication not identified engine.On the basis of the results obtained, we advance some hypothesison the role of NOC on the nucleation burst in pollutedatmosphere

Notes:

Vendor supplied data

Publisher Number:

2005-24-011

Access Restriction:

Restricted for use by site license