Reduction of PAH and soot in premixed ethylene–air flames by addition of ethanol
Reduction of PAH and soot in premixed ethylene–air flames by addition of ethanol
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DOI：
10.1016/j.combustflame.2005.08.036
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发表时间：
2006-03
影响因子：
4.4
通讯作者：
Juntao Wu;K. Song;T. Litzinger;Seong-Young Lee;R. Santoro;M. Linevsky;M. Colket;D. Liscinsky
中科院分区：
文献类型：
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作者：
Juntao Wu;K. Song;T. Litzinger;Seong-Young Lee;R. Santoro;M. Linevsky;M. Colket;D. Liscinsky
结果来自于一项联合实验和模型研究，该研究旨在了解向富含燃料的乙烯火焰中添加乙醇导致多环芳烃和烟灰减少的途径。实验工作在平焰燃烧器中进行，当量比为2.34和2.64。乙醇以两种水平加入到乙烯中，对应于燃料中5%和10%的氧气重量。用激光诱导白炽灯测量烟灰，用激光诱导荧光法测量芳香物质。建模基于一维预混火焰模型和文献中的动力学机制。建模工作捕捉了芳香物质随燃料中当量比和氧浓度变化的趋势。然而，烟尘预测与较高等效比下观测到的增加不符。对较低当量比的模拟结果分析表明，乙烯中乙醇的加入主要是通过减少可形成前体的碳的数量来减少芳香族。
Results are presented from a combined experimental and modeling study undertaken to understand the pathways by which the addition of ethanol to fuel-rich ethylene flames causes reductions in PAH and soot. The experimental work was conducted in a flat-flame burner at equivalence ratios of 2.34 and 2.64. Ethanol was added to the ethylene at two levels corresponding to 5 and 10% oxygen by weight in the fuel. Soot was measured by laser-induced incandescence calibrated with light extinction, and aromatic species were measured using laser-induced fluorescence. Modeling was based on a 1-D premixed flame model and kinetic mechanisms available in the literature. The modeling work captures the trends in aromatic species with changes in equivalence ratio and oxygen concentration in the fuel. However, the soot predictions do not match the increases observed at the higher equivalence ratio. Analysis of the modeling results for the lower equivalence ratio shows that the addition of ethanol to the ethylene reduces the aromatic species mainly by reducing the amount of carbon that is available to form precursor species.