In this work, the effects of feedstock water leaching on ignition and PM_1.0 emission during biomass combustion were studied, for the first time, in a Hencken flat-flame burner reactor (HFFBR). A high-speed video camera and high-resolution electrical low-pressure impactor were respectively employed to diagnose ignition and PM_1.0 along the height of the burner. The mineral composition of PM₁₀₊ was measured as a function of height to demonstrate the potassium release during the early stage of biomass combustion. The results show that water leaching does not change the functional group of the biomass (straw), but increases the BET surface area and pore volume. Water leaching removes 90% of the potassium and all the chlorine, reducing the same amount of PM_1.0 emission. The effect of water leaching on ignition delay observed in the flat-flame burner reactor agrees with the delay of biomass-devolatilization in TGA. Profiles of mineral composition in the PM₁₀₊ with height shows that a large amount of the potassium is released before biomass ignition. This indicates that, at realistic heating rates, the catalytic promotion of water-soluble minerals on biomass ignition is primarily through promoting devolatilization. The ignition delay of biomass particles caused by water leaching is more significant at lower temperature, e.g., ignition is delayed from 20 to 24 ms at 1000 °C, and from 9.2 to 10.2 ms at 1300 °C.

在这项工作中，首次在Hencken平板火焰燃烧器反应堆（HFFBR）中研究了原料水浸出对生物质燃烧过程中着火和PM _1.0排放的影响。分别使用高速摄像机和高分辨率低压电动冲击器来诊断沿燃烧器高度的点火和PM _1.0。测量了PM ₁₀₊的矿物成分随高度的变化，以证明生物质燃烧初期钾的释放。结果表明，水浸出不会改变生物质（稻草）的官能团，但会增加BET表面积和孔体积。水浸去除90％的钾和所有氯，减少相同量的PM_1.0发射。在平焰燃烧器反应堆中观察到的水浸出对点火延迟的影响与TGA中生物质脱挥发分的延迟一致。PM ₁₀₊中矿物质组成随高度的分布图表明，在生物质着火之前释放出大量钾。这表明，在现实的加热速率下，水溶性矿物质对生物质着火的催化促进作用主要是通过促进脱挥发分。在较低温度下，由水浸出引起的生物质颗粒的着火延迟更为显着，例如，在1000°C下，点燃延迟从20到24 ms，在1300°C下，点燃延迟从9.2到10.2 ms。