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http://dx.doi.org/10.7837/kosomes.2012.18.1.055

A Study on Effect of n-heptane Mixing on PAH and Soot Formation in Counterflow Ethylene Diffusion Flames  

Choi, Jae-Hyuk (Division of Marine System Engineering Korea Maritime University)
Han, Won-Hui (Division of Marine Engineering System Mokpo National Maritime University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.18, no.1, 2012 , pp. 55-60 More about this Journal
Abstract
In order to investigate the effect of n-heptane mixing on PAH and soot formation, small amount of n-heptane has been mixed in counterflow ethylene diffusion flame. Laser-induced incandescene and laser-induced fluorescene techniques were employed to measure soot volume fraction and polycyclic aromatic hydrocarbon(PAH) concentration, respectively. Results showed that the mixing of n-heptane in ethylene diffusion flame produces more PAHs and soot than those of pure ethylene flame. However, signals of LIF for 20% n-heptane mixture flame were lower than that of pure ethylene flame. It can be considered that the enhancement of PAH and soot formation by the n-heptane mixing of ethylene can be explained by methyl($CH_3$) radical in the low temperature region. And it can be found that reaction rate of H radical for 10% n-heptane plays a crucial role for benzene formation.
Keywords
Soot; Polycyclic aromatic hydrocarbon(PAH); Counterflow flame; n-heptane; methyl radical;
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