ABSTRACT

The effects of the addition of n-butanol on the formation of hydrocarbons and polycyclic aromatic hydrocarbons (PAHs) of n-heptane combustions were investigated using a micro flow reactor (MFR) with a controlled temperature profile. The concentrations of small and large hydrocarbons, as well as PAHs were measured at a maximum wall temperature of 1,100 K and atmospheric pressure. The values obtained from several mechanisms were compared to the measurement values at equivalence ratios of 2.0–5.0. The CRECK mechanism was in fair agreement with the measurements. The computational results confirmed that the concentration of the PAHs and soot precursors’ decreased, while that of CO and CO₂ increased due to the addition of butanol. These trends were also shown by the measurement values. The reaction path and rate of production analyzes were carried out to identify the major reactions contributing toward species concentrations.

摘要

使用具有受控温度分布的微流反应器 (MFR)研究了添加正丁醇对正庚烷燃烧中碳氢化合物和多环芳烃 (PAH) 形成的影响。在最高壁温 1,100 K 和大气压下测量了小型和大型碳氢化合物以及多环芳烃的浓度。将从几种机制获得的值与当量比为 2.0-5.0 时的测量值进行比较。CRECK 机制与测量结果相当一致。计算结果证实，PAHs 和烟尘前驱物的浓度降低，而 CO 和 CO ₂由于加入丁醇而增加。这些趋势也由测量值显示。进行了反应路径和生产速率分析，以确定对物种浓度有贡献的主要反应。