Nano-organic carbon and soot particle measurements in a laminar ethylene diffusion flame

Date

2005-01-01

Author

D'Anna, A
Rolando, A
Allouis, Christophe Gerard
Minutolo, P
D'Alessio, A

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The formation of carbonaccous particulates in a co-flow laminar diffusion flame has been studied using UV-visible spectroscopy and laser scattering/extinction techniques for measurements of volume fractions and particle sizes. Measurements were performed in a non-smoking ethylene-air flame at atmospheric pressure. UV-visible spectroscopy allowed the identification of two classes of particles: soot particles, which absorb light in the whole spectral range and nano-organic carbon particles (NOC) which are transparent to the visible radiation. The mean size of nano-organic carbon particles was estimated to be about 2-3 nm. This agreed with previous results obtained in rich premixed flames with equivalence ratios across the soot formation threshold. The experimental results indicate that nano-organic carbon particles are formed in the fuel side of the flame front closer to the flame centre line than soot particles and with a concentration level comparable to that of soot. The intermediate spatial location of these particles between the fuel- and soot-containing regions and their high concentration in flame suggest that soot formation is just the consequence of coagulation of NOC particles without a major role of surface growth in the soot loading process. (c) 2004 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

URI

https://hdl.handle.net/11511/89888

Journal

PROCEEDINGS OF THE COMBUSTION INSTITUTE

DOI

https://doi.org/10.1016/j.proci.2004.08.276

Collections

Department of Mechanical Engineering, Article

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Citation Formats

A. D’Anna, A. Rolando, C. G. Allouis, P. Minutolo, and A. D’Alessio, “Nano-organic carbon and soot particle measurements in a laminar ethylene diffusion flame,” PROCEEDINGS OF THE COMBUSTION INSTITUTE, pp. 1449–1456, 2005, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/89888.