IMECH-IR  > 高温气体动力学国家重点实验室
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)
Source PublicationENERGY & FUELS
2018-04-01
Volume32Issue:4Pages:4417-4423
ISSN0887-0624
AbstractFly 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.
DOI10.1021/acs.energyfuels.7b03001
Indexed BySCI ; EI
Language英语
WOS IDWOS:000430783300037
WOS KeywordHIGH-TEMPERATURE CORROSION ; CIRCULATING FLUIDIZED-BED ; VICTORIAN BROWN-COAL ; EARTH METALS ; INORGANIC CONSTITUENTS ; WOOD COMBUSTION ; RELEASE ; TRANSFORMATION ; RESIDUES ; CHLORIDE
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
Funding OrganizationNational Key R&D Program of China(2016YFB0600601)
Classification二类
Ranking1
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/77482
Collection高温气体动力学国家重点实验室
空天飞行科技中心(筹)
Recommended Citation
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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