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


D'Anna A., Rolando A., Allouis C. G., Minutolo P., D'Alessio A.

30th International Symposium on Combustion, Abstracts of Symposium Papers, Chicago, IL, United States Of America, 25 - 30 July 2004, pp.79 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume:
  • City: Chicago, IL
  • Country: United States Of America
  • Page Numbers: pp.79
  • Middle East Technical University Affiliated: No

Abstract

The formation of carbonaceous particulates in a co-flow laminar diffusion flame was studied using UV-visible spectroscopy and laser scattering/extinction techniques for measurements of volume fraction and particle sizes. Measurements were performed in a non-smoking ethylene-air flame at 1 atm. The mean size of nano organic carbon particles was ∼ 2-3 nm, which was in agreement with previous results obtained in rich premixed flames with equivalence ratios across the soot formation threshold. Nano-organic carbon particles were formed in the fuel side of the flame front closer to the flame center line than soot particles and with a concentration level comparable to that of soot suggesting a role mainly responsible for soot formation. The intermediate spatial location of these particles between the fuel- and soot-containing regions and their high concentration in flame suggested that soot formation is just the consequence of coagulation of NOC particles without a major role of surface growth in the soot loading process.