Effects of Alkali Metals on the Formation of Particulate Matter and Adsorption of Floating Beads during Zhundong Coal Combustion

doi:10.1021/acs.energyfuels.9b00238

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	Effects of Alkali Metals on the Formation of Particulate Matter and Adsorption of Floating Beads during Zhundong Coal Combustion
	Zhang YF(张玉锋); Zhao J(赵京); Wei XL(魏小林); Li T(李腾); Qiao Y(乔宇); Xu MH
刊名	ENERGY & FUELS
	2019-06
卷号	33 期号:6 页码:5422-5429
ISSN号	0887-0624
DOI	10.1021/acs.energyfuels.9b00238
英文摘要	Zhundong coal plays an important role in China's energy utilization. However, due to its high content of alkali metals, it produces a large amount of particulate matter during combustion. In this paper, the coal was first washed with deionized water to remove the influence of alkali-metal salts. Then, different kinds of Na salts (1% NaCl, 1% Na2SO4, and 1% NaAc) were added to the de-alkali coals. The effect of Na salts on the formation of PM10 was studied in a high-temperature drop-tube furnace at 1300 degrees C. After the addition of the Na salts, the amount of particulate matter emission was significantly increased. When 1% NaCl was added to the de-alkali coal, the amount of PM produced was 3.1 times that of the raw coal, while the amount of PM2.5 produced was 3 times that of raw coal. After adding 1% Na2SO4, the amounts of PM1 and PM2.5 produced were twice those of the raw coal. In addition, floating beads exhibit a good adsorption effect on particulate matter for the combustion of the coal with different Na salts added. The yield of ultrafine and submicrometer particles was significantly reduced when 3% floating beads were added to the de-alkali coal with Na salts added. The reductions of PM1 were 47.0% for NaCl, 51.0% for Na2SO4, and 29.4% for NaAc. Additionally, the adsorption process of floating beads on ultrafine and submicrometer particles is mainly through the reaction between alkali-metal vapors and SiO2 and Al2O3 in the sorbents.
分类号	二类
WOS关键词	PULVERIZED COAL ; PARTICLE FORMATION ; ASH DEPOSITION ; EARTH METALS ; EARLY-STAGE ; SODIUM ; PM2.5 ; PYROLYSIS ; EMISSIONS ; TRANSFORMATION
WOS研究方向	Energy & Fuels ; Engineering, Chemical
语种	英语
WOS记录号	WOS:000472800900072
资助机构	National Key R&D Program of China [2016YFB0600601]
其他责任者	Wei, XL
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/81444]
专题	力学研究所_高温气体动力学国家重点实验室
推荐引用方式 GB/T 7714	Zhang YF,Zhao J,Wei XL,et al. Effects of Alkali Metals on the Formation of Particulate Matter and Adsorption of Floating Beads during Zhundong Coal Combustion[J]. ENERGY & FUELS,2019,33(6):5422-5429.
APA	张玉锋,赵京,魏小林,李腾,乔宇,&Xu MH.(2019).Effects of Alkali Metals on the Formation of Particulate Matter and Adsorption of Floating Beads during Zhundong Coal Combustion.ENERGY & FUELS,33(6),5422-5429.
MLA	张玉锋,et al."Effects of Alkali Metals on the Formation of Particulate Matter and Adsorption of Floating Beads during Zhundong Coal Combustion".ENERGY & FUELS 33.6(2019):5422-5429.