Evidence of PAH production under lean combustion conditions
Evidence of PAH production under lean combustion conditions
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DOI：
10.1016/j.fuel.2007.02.015
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发表时间：
2007-10
期刊：
影响因子：
7.4
通讯作者：
N. Yilmaz;A. Donaldson
中科院分区：
文献类型：
--
作者：
N. Yilmaz;A. Donaldson
虽然这是常识，PAH的形成，可以预期在丰富的燃烧条件下，本文提出的实验和计算证据表明，PAH的形成也可以预期在贫，或冷，燃烧条件下。柴油机在稀燃条件下运行的实验证据，以及与废轮胎和煤燃烧相关的文献参考，被引用作为这里得出的结论的支持证据。基于三种替代燃料C2 H2、C7 H16和C14 H28的反应机理建立的计算模型，与柴油机数据进行了对比验证，并预测了贫燃和富燃工况。研究结果是，在绝热的情况下，多环芳烃的最小生产量发生在等价的单位和增加等价变得要么贫或富;后一个观察是符合常识。
While it is common knowledge that PAH formation can be expected at rich combustion conditions, this paper presents experimental and computational evidence that PAH formation can also be expected under lean, or cool, combustion conditions. Experimental evidence for diesel engine operation at lean conditions, as well as the literature references related to waste tire and coal combustion, are cited as supportive evidence of conclusions drawn here. A computational model based on reaction mechanisms for three surrogate fuels: C2H2, C7H16and C14H28, was validated against the available diesel engine data, and projected to both lean and rich combustion conditions. The finding was that for the adiabatic case, minimum production of PAHs occurs at equivalence of unity and increases as equivalence becomes either lean or rich; the latter observation being consistent with the common knowledge.