Effect of Fuel/Air Ratio and Aromaticity on Sooting Behavior of Premixed Heptane Flames
Effect of Fuel/Air Ratio and Aromaticity on Sooting Behavior of Premixed Heptane Flames
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DOI：
10.1021/ef070159y
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发表时间：
2007-07
期刊：
影响因子：
5.3
通讯作者：
A. D’Anna;M. Alfè;B. Apicella;A. Tregrossi;A. Ciajolo
中科院分区：
文献类型：
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作者：
A. D’Anna;M. Alfè;B. Apicella;A. Tregrossi;A. Ciajolo
Oxidation and pyrolysis products were sampled and quantified along the axis of premixed laminar flames burning n-heptane in slightly sooting (C/O = 0.7) and heavily sooting conditions (C/O = 0.8) by means of gas chromatographic analysis. Total particulate was extracted with dichloromethane (DCM) in order to separate condensed species (CS) including polycyclic aromatic hydrocarbons from soot. The effect of aromatic addition (10 vol % of n-propylbenzene) to n-heptane fuel in heavily sooting conditions on the distribution of light hydrocarbons was also studied. Detailed modeling extended to the formation of high-molecular-weight species and soot was performed to verify the effect of the C/O ratio and of the fuel aromatic content on soot formation. The C/O ratio was found to affect benzene formation which in turn caused an increase of condensed species and soot formation rates. The fuel aromaticity was found to shift soot inception upstream in the flame increasing soot in the oxidation region of the flame. Ho...
