Significant contribution of organically-bound Mg, Ca, and Fe to inorganic PM10 emission during the combustion of pulverized Victorian brown coal
Significant contribution of organically-bound Mg, Ca, and Fe to inorganic PM10 emission during the combustion of pulverized Victorian brown coal
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DOI：
10.1016/j.fuel.2013.09.056
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发表时间：
2014-01-01
期刊：
影响因子：
7.4
通讯作者：
Wu, Hongwei
中科院分区：
文献类型：
--
作者：
Gao, Xiangpeng;Rahim, Muhammad Usman;Wu, Hongwei
本研究以维多利亚褐煤为原料，采用水洗和稀酸洗涤相结合的方法，制备了一套无机物种赋存状态简化的煤样。水洗煤主要含有有机结合态(主要是镁、钙、铁)和离散的矿物颗粒，而酸洗的煤只由离散的矿物颗粒组成。煤样(即原煤、水洗煤和酸洗煤)在1400℃的空气中，在实验室规模的滴管炉中燃烧，产生空气动力学直径小于10微米(PM10)的无机颗粒物(PM)。对三种煤燃烧产生的PM10的产量、粒度分布和化学性质的基准测试清楚地表明，大部分PM10，包括空气动力学直径小于1微米(PM1)和1到10微米(PM1-10)的PM10，都是由有机结合元素(主要是镁、钙和铁)贡献的，而由于褐煤中离散矿物颗粒的含量很低，所以贡献很有限。结果还表明，空气动力学直径小于0.1微米的颗粒物(PM0.1)主要由水溶性盐类(如氯化钠)贡献。(C)2013爱思唯尔有限公司。保留所有权利。
This study deployed water-washing and dilute acid washing of a Victorian brown coal to prepare a set of coal samples with simplified occurrence forms of inorganic species. The resulted water-washed coal contains dominantly organically-bound species (primarily Mg, Ca, and Fe) and discrete mineral particles whereas the acid-washed coal only consists of discrete mineral particles. The coal samples (i.e., the raw, the water-washed and the acid-washed coals) were combusted in a lab-scale drop-tube furnace in air at 1400 degrees C to produce inorganic particulate matter (PM) with aerodynamic diameter less than 10 mu m (PM10). Benchmarking on yields, particle size distribution, and chemical properties of PM10 produced from the combustion of the three coals clearly demonstrates that majority of PM10, including PM with aerodynamic diameter less than 1 mu m (PM1) and between 1 and 10 mu m (PM1-10), is contributed by organically-bound elements (mainly Mg, Ca, and Fe) whereas there is only limited contribution from discrete mineral particles due to their low contents in the brown coal. The results also clearly show that the water-soluble salts (e. g., NaCl) mainly contribute to the emission of PM with aerodynamic diameter less than 0.1 mu m (PM0.1). (C) 2013 Elsevier Ltd. All rights reserved.