Effect of the interaction between sodium and soot on fine particle formation in the early stage of coal combustion
Effect of the interaction between sodium and soot on fine particle formation in the early stage of coal combustion
复制标题
钠与烟灰相互作用对煤燃烧初期细颗粒形成的影响
DOI：
10.1016/j.fuel.2017.06.023
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发表时间：
2017-10
期刊：
影响因子：
7.4
通讯作者：
Yao Qiang
中科院分区：
文献类型：
--
作者：
Xiao Zhenghang;Tang Yong;Zhuo Jiankun;Yao Qiang
矿物转化和碳烟生成是煤燃烧早期形成细小颗粒的两种控制机制。然而，蒸发碱物种与烟尘之间的相互作用对细颗粒的形成具有重要影响，但尚不完全清楚。为了研究煤燃烧初期钠与烟尘的相互作用，我们对四种煤样在热解和氧化气氛下的颗粒物进行了表征，包括酸洗煤样和含钠煤样。结果表明，在热解条件下，Na的加入可以降低煤粉的碳烟产率和颗粒尺寸。掺钠碳烟是由蒸发矿物和碳烟前驱体通过火焰合成形成的，钠含量对碳烟的氧化活性有很大影响。由于掺钠沥青(YK-Na)的钠含量高、积灰倾向强，导致燃烧初期的细颗粒产率较低，因此钠与烟尘的相互作用降低了燃烧初期的细颗粒产率。根据实验结果，提出了Na-烟灰相互作用途径的示意图。催化烟尘氧化和消除超细矿物颗粒是Na-烟尘相互作用影响细颗粒形成和演化的两种主要途径。
Mineral transformation and soot formation are the two governing mechanisms for fine particle formation in the early stage of coal combustion. The interaction between the evaporative alkali species and soot, which can have significant effect on fine particle formation, however, is not fully understood. To investigate the interaction between Na and soot in the early stage of coal combustion, we characterized the particles derived from four coals samples, including acid-washed and Na-loaded samples, under both the pyrolytic and oxidizing atmospheres. It was found that Na can reduce the soot yield and particle size under the pyrolysis condition. The Na-doped soot was formed by flame synthesis of vaporized minerals and soot precursors, and the Na content had a strong effect on soot oxidation activity. The Na-soot interaction was found to reduce the fine particle yield in the early combustion stage, as the high Na concentration and strong sooting tendency of a sodium doped bituminous (YK-Na) resulted in a lower fine particle yield. A schematic of the Na-soot interaction pathways is proposed based on the experimental results. Catalyzing soot oxidation and eliminating ultrafine mineral particles were found to be the two principal ways by which Na-soot interaction affects the formation and evolution of fine particles.
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影响因子：
5.3
作者：
Xiangpeng Gao;Hongwei Wu
通讯作者：
Xiangpeng Gao;Hongwei Wu
DOI：
10.1016/j.proci.2010.09.014
发表时间：
2011
期刊：
--
影响因子：
--
作者：
Minghou Xu;Dunxi Yu;H. Yao;Xiaowei Liu;Y. Qiao
通讯作者：
Minghou Xu;Dunxi Yu;H. Yao;Xiaowei Liu;Y. Qiao
影响因子：
7.4
作者：
Li, Chun-Zhu
通讯作者：
Li, Chun-Zhu
影响因子：
5.2
作者：
Kenny, LC;Gussmann, R;Meyer, M
通讯作者：
Meyer, M
影响因子：
4.5
作者：
D. Kim;Kyeongmi Lee;Y. J. Kim
通讯作者：
D. Kim;Kyeongmi Lee;Y. J. Kim