Behavior of Alkali Metals in Fly Ash during Waste Heat Recovery for Municipal Solid Waste Incineration

doi:10.1021/acs.energyfuels.7b03001

	Behavior of Alkali Metals in Fly Ash during Waste Heat Recovery for Municipal Solid Waste Incineration
	Zhao J(赵京); Wei XL(魏小林); Li T(李腾); Li HX(李慧鑫); Bin F(宾峰)
发表期刊	ENERGY & FUELS
	2018-04-01
卷号	32 期号:4 页码:4417-4423
ISSN	0887-0624
摘要	Fly ash containing high levels of alkali metals likely causes deleterious effects during municipal solid waste incineration, including fouling, slagging, corrosion, and deterioration of materials. This study aimed to understand the occurrence of alkali metals in fly ash, the attachment phenomenon of fly ash, and the corrosion mechanisms of high-temperature surfaces in heat exchangers. The presence of alkali metals was studied through a three-step extraction. Additionally, scanning electron microscopy energy-dispersive spectrometry was used to analyze the surface microstructure of fly ashes. X-ray fluorescence and X-ray diffraction (XRD) spectroscopies were used for content and crystalline phase analyses of alkali metals. The experimental results indicated that the surfaces of fly ash that contained higher levels of alkali metals were smoother and the content of alkali metals tended to increase with a slight fluctuation with the declining effluent gas temperature. The alkali metals were mainly water-soluble. On the basis of the XRD analyses, the water-soluble alkali metals were primarily alkali chlorides and sulfates, existing as NaCl, KCl, and K3Na(SO4)(2). Moreover, the transformation of alkali metals could accelerate corrosion of the heat exchanger as a result of the formation of a low-temperature eutectic melt.
DOI	10.1021/acs.energyfuels.7b03001
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000430783300037
关键词[WOS]	HIGH-TEMPERATURE CORROSION ; CIRCULATING FLUIDIZED-BED ; VICTORIAN BROWN-COAL ; EARTH METALS ; INORGANIC CONSTITUENTS ; WOOD COMBUSTION ; RELEASE ; TRANSFORMATION ; RESIDUES ; CHLORIDE
WOS研究方向	Energy & Fuels ; Engineering
WOS类目	Energy & Fuels ; Engineering, Chemical
项目资助者	National Key R&D Program of China(2016YFB0600601)
论文分区	二类
力学所作者排名	1
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/77482
专题	高温气体动力学国家重点实验室空天飞行科技中心
推荐引用方式 GB/T 7714	Zhao J,Wei XL,Li T,et al. Behavior of Alkali Metals in Fly Ash during Waste Heat Recovery for Municipal Solid Waste Incineration[J]. ENERGY & FUELS,2018,32,4,:4417-4423.
APA	赵京,魏小林,李腾,李慧鑫,&宾峰.(2018).Behavior of Alkali Metals in Fly Ash during Waste Heat Recovery for Municipal Solid Waste Incineration.ENERGY & FUELS,32(4),4417-4423.
MLA	赵京,et al."Behavior of Alkali Metals in Fly Ash during Waste Heat Recovery for Municipal Solid Waste Incineration".ENERGY & FUELS 32.4(2018):4417-4423.

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