Abstract Emission reduction of PM10 (of an aerodynamic diameter of 10 μm or less) was investigated via the combustion of biochar pre-treated from straw by torrefaction at 300 °C (T-300), slow pyrolysis at 500 °C (S-500), or hydrothermal carbonisation at 240 °C (H-240), and their co-combustion with Ping Ding Shan (PDS) bituminous coal in a drop tube furnace at 1400 °C. The generated PM10 was collected by a Dekati low pressure impactor (DLPI) sample system, and its mass/chemical composition was characterised. During single combustion of the straw and its pre-treated biochar, the emission amount of PM0.3 (aerodynamic diameter of ≤0.3 μm) from the biochar was linearly affected by the release of Cl during various pre-treatments and the formed KCl release into the gas phase during combustion. The emission of PM1-10 still changed linearly, mainly because of the increased ash content after pre-treatment. Co-combustion of biomass fuels and PDS coal presents an obvious reduction in PM10 emission, particularly PM0.3. The higher Cl content in biomass fuels is also linearly correlated with a greater reduction in PM0.3 emission. Aluminosilicates in coal, e.g. kaolinite, are responsible for the capture of gaseous species from biofuels and the subsequent coalescence of sticky minerals, reducing PM0.3 and PM1-10 emissions following co-combustion.

中文翻译：

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通过焙烧、慢热解或水热碳化及其与煤粉混合燃烧的热预处理减少生物炭燃烧产生的颗粒物排放

摘要 通过在 300 °C (T-300) 和 500 °C 下缓慢热解 (S-500) 对秸秆预处理的生物炭进行燃烧，研究了 PM10（空气动力学直径为 10 μm 或更小）的减排量。 )，或在 240 °C (H-240) 下进行水热碳化，并在 1400 °C 下在下降管式炉中与平顶山 (PDS) 烟煤共同燃烧。生成的 PM10 由 Dekati 低压冲击器 (DLPI) 采样系统收集，并表征其质量/化学成分。在秸秆及其预处理生物炭的单次燃烧过程中，生物炭PM0.3（空气动力学直径≤0.3 μm）的排放量受各种预处理过程中Cl释放量和形成的KCl释放量的线性影响。燃烧过程中的气相。PM1-10的排放量仍呈线性变化，主要是因为预处理后灰分含量增加。生物质燃料与 PDS 煤混合燃烧可明显减少 PM10 排放，尤其是 PM0.3。生物质燃料中较高的 Cl 含量也与 PM0.3 排放量的更大减少呈线性相关。煤中的铝硅酸盐（例如高岭石）负责从生物燃料中捕获气态物质并随后使粘性矿物聚结，从而减少混合燃烧后 PM0.3 和 PM1-10 的排放。