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首页> 外文期刊>Energy & fuels >Roles of Inherent Fine Included Mineral Particles in the Emission of PM_(10) during Pulverized Coal Combustion
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Roles of Inherent Fine Included Mineral Particles in the Emission of PM_(10) during Pulverized Coal Combustion

机译：煤粉燃烧过程中固有的细微含矿物质颗粒物在PM_（10）排放中的作用

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摘要

A coal sample was prepared from a Western Australia sub-bituminous coal via density separation (1.4-1.6 g/cm~3) and size separation (63-90 μm). The mineral matter in the coal is of included nature, of which ～90% are fine mineral particles < 10 μm. The raw coal was then washed by dilute acid to prepare an acid-washed coal from which char sample was generated in a quartz drop-tube/fixed-bed reactor at 1000 ℃ under argon atmosphere. The acid-washed coal and char samples were then combusted in a drop-tube furnace at 1400 ℃ in air. The PM_(10) samples collected (mostly PM_(1-10)) contains mainly refractory species including Si, Al, Fe, Mg, and Ca and account for ～19.4% of the total ash collected in both the low-pressure impactor and the cyclone. This suggests important roles of the abundant fine included mineral particles originally present in coal The significant roles of fine included mineral particles in PM_(1-10) emission during acid-washed coal and char combustion are also clearly evidenced with the presence of abundant individual but partially molten quartz ash particles in the PM_(1-10) range. PM_(0.1) contains dominantly volatile elements (e.g., Na, K, P, S, and Cl) and refractory elements (Fe and Si), while PM_(0.1-1) are mainly composed of Al, Fe, and Si. The significant roles of fine included kaolinite and/or Al-silicates particles in the emission of PM_(0.1-1) from char combustion are also observed. The results suggest that liberation and transformation of fine included mineral particles in coal/char during combustion is a key mechanism responsible for PM_(10) formation and/or emission. Experimental evidence further suggests mat the fine included minerals within a burning coal particle clearly experience coalescence to form large agglomerated ash particles.
机译：通过密度分离（1.4-1.6 g / cm〜3）和粒度分离（63-90μm）从西澳大利亚州次烟煤制备煤样品。煤中的矿物质具有包容性，其中约90％是＜10μm的细矿物颗粒。然后将原煤用稀酸洗涤，以制备经酸洗的煤，在石英滴管/固定床反应器中，在氩气气氛下，于1000℃从中生成焦炭样品。然后将酸洗过的煤和焦炭样品在滴管炉中于1400℃的空气中燃烧。收集的PM_（10）样品（主要是PM_（1-10））主要包含难熔物质，包括Si，Al，Fe，Mg和Ca，约占低压冲击器和灰分收集器总灰分的〜19.4％。旋风。这表明最初存在于煤中的丰富的细颗粒矿物质颗粒的重要作用。在酸洗煤和焦炭燃烧过程中，细颗粒的矿物质颗粒在PM_（1-10）排放中的重要作用也清楚地证明了存在大量的个体，但是PM_（1-10）范围内的部分熔融石英灰颗粒。 PM_（0.1）主要含有挥发性元素（例如Na，K，P，S和Cl）和难熔元素（Fe和Si），而PM_（0.1-1）主要由Al，Fe和Si组成。还观察到细粉包括高岭石和/或铝硅酸盐颗粒在焦炭燃烧过程中的PM_（0.1-1）排放中。结果表明，燃烧过程中煤/焦炭中包含的细小矿物颗粒的释放和转化是造成PM_（10）形成和/或排放的关键机制。实验证据进一步表明，燃烧的煤颗粒中包含的细小矿物明显经历了聚结，形成了大块的灰烬颗粒。

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  • 来源
    《Energy & fuels》 |2012年第novaadeca期|6783-6791|共9页
  • 作者

    Xiangpeng Gao; Yi Li; Manuel Garcia-Perez; Hongwei Wu;

  • 作者单位

    Department of Chemical Engineering and Fuels and Energy Technology Institute, Curtin University, GPO Box U1987, Perth WA 6845, Australia;

    Department of Chemical Engineering and Fuels and Energy Technology Institute, Curtin University, GPO Box U1987, Perth WA 6845, Australia;

    Biological Systems Engineering, Washington State University, L. J. Smith 20S, P.O. Box 64120, Pullman, Washington 99164-6120, United States;

    Department of Chemical Engineering and Fuels and Energy Technology Institute, Curtin University, GPO Box U1987, Perth WA 6845, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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