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Emissions of parent nitrated and oxygenated polycyclic aromatic hydrocarbons from indoor corn straw burning in normal and controlled combustion conditions

机译：在正常和受控燃烧条件下室内玉米秸秆燃烧过程中母体硝化和氧化的多环芳烃的排放

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摘要

Emission factors (EFs) of parent polycyclic aromatic (pPAHs), nitrated PAHs (nPAHs), and oxygenated PAHs (oPAHs) were measured for indoor corn straw burned in a cooking brick stove in both normal and controlled burning conditions. EFs of total 28 pPAHs, 6 nPAHs and 4 oPAHs were 7.9±3.4, 6.5±1.6×10-3, and 6.1±1.4×10-1 mg/kg, respectively. By controlling the burning conditions, it was found that the influence of fuel charge size on EFs of the pPAHs and derivatives was insignificant. Measured EFs increased significantly in a fast burning mainly because of the oxygen deficient atmosphere formed in the stove chamber with a small volume. In both restricted and enhance air supply conditions, EFs of pPAHs, nPAHs and oPAHs were significantly higher than those measured in normal burning conditions. Though EFs varied in different burning conditions, the composition profiles and calculated isomer ratios were similar without significant differences. The results from the stepwise regression model showed that fuel burning rate, air supply amount, and modified combustion efficiency were three most significant influencing factors, explaining 72-85% of the total variations.
机译：在正常和受控燃烧条件下，对在烹饪砖炉中燃烧的室内玉米秸秆测量了母体多环芳烃（pPAHs），硝化PAH（nPAHs）和氧化PAHs（oPAHs）的排放因子（EF）。总共28个pPAHs，6个nPAHs和4个oPAHs的EFs为7.9±3.4、6.5±1.6×10 -3 和6.1±1.4×10 -1 mg / kg，分别。通过控制燃烧条件，发现燃料装料量对pPAHs和衍生物的EFs的影响微不足道。快速燃烧中测得的EFs显着增加，这主要是由于在炉腔中形成了小体积的缺氧气氛。在受限和增强的空气供应条件下，pPAH，nPAH和oPAH的EF均显着高于正常燃烧条件下的EF。尽管EFs在不同的燃烧条件下会有所不同，但其组成特征和计算出的异构体比例却相似，没有显着差异。逐步回归模型的结果表明，燃料燃烧率，空气供应量和修正的燃烧效率是三个最重要的影响因素，占总变化的72-85％。

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