Smoke emissions due to burning of green waste in the Mediterranean area: Influence of fuel moisture content and fuel mass
Smoke emissions due to burning of green waste in the Mediterranean area: Influence of fuel moisture content and fuel mass
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DOI：
10.1016/j.atmosenv.2017.04.002
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发表时间：
2017-06
影响因子：
5
通讯作者：
V. tihay-felicelli;P. Santoni;Guillaume Gerandi;T. Barboni
中科院分区：
文献类型：
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作者：
V. tihay-felicelli;P. Santoni;Guillaume Gerandi;T. Barboni
本研究的目的是调查排放特性的燃料水分含量（FMC）和初始干质量的差异。为此目的，在与傅立叶变换红外光谱仪耦合的大规模热释放装置中燃烧具有叶子的岩蔷薇的树枝和细枝。进行了烟雾分析，结果突出了CO2，H2O，CO，CH4，NO，NO2，NH3，SO2和非甲烷有机化合物（NMOC）的存在。在有焰燃烧过程中主要释放CO2、NO和NO2，而在有焰燃烧和阴燃燃烧过程中均释放CO、CH4、NH3和NMOC。这些化合物在有焰燃烧期间的排放是由于富燃料与空气混合物，导致不完全燃烧。燃料含水量和初始干质量影响火焰停留时间、阴燃持续时间、燃烧效率和排放因子。随着初始干质量的增加，NO、NO2和CO2的排放因子降低，而CO和CH4的排放因子增加。FMC的增加导致CO、CH4、NH3、NMOC和气溶胶的排放因子增加，而CO2、NO和NO2的排放因子减少。增加燃料水分含量减少燃料消耗，阴燃的持续时间，和峰值热释放速率，但同时增加的填充床内的传播的持续时间，和火焰的停留时间。增加初始干质量，导致所有先前的燃烧参数增加。这些发现对模拟生物质燃烧排放和影响具有影响。
The aim of this study was to investigate emission characteristics in relation to differences in fuel moisture content (FMC) and initial dry mass. For this purpose, branches and twigs with leaves ofCistus monspeliensiswere burned in a Large Scale Heat Release apparatus coupled to a Fourier Transform Infrared Spectrometer. A smoke analysis was conducted and the results highlighted the presence of CO2, H2O, CO, CH4, NO, NO2, NH3, SO2, and non-methane organic compounds (NMOC). CO2, NO, and NO2species are mainly released during flaming combustion, whereas CO, CH4, NH3, and NMOC are emitted during both flaming and smoldering combustion. The emission of these compounds during flaming combustion is due to a rich fuel to air mixture, leading to incomplete combustion. The fuel moisture content and initial dry mass influence the flame residence time, the duration of smoldering combustion, the combustion efficiency, and the emission factors. By increasing the initial dry mass, the emission factors of NO, NO2, and CO2decrease, whereas those of CO and CH4increase. The increase of FMC induces an increase of the emission factors of CO, CH4, NH3, NMOC, and aerosols, and a decrease of those of CO2, NO, and NO2. Increasing fuel moisture content reduces fuel consumption, duration of smoldering, and peak heat release rate, but simultaneously increases the duration of propagation within the packed bed, and the flame residence time. Increasing the initial dry mass, causes all the previous combustion parameters to increase. These findings have implications for modeling biomass burning emissions and impacts.